Scientific and social significance of assessing individual differences: "sinking shafts at a few critical points"

Sex/gender differences in general cognitive abilities: an investigation using the Leiter-3

Research has shown that differences between males and females are not in general intelligence, but only in some specific factors and tasks. We used the Italian standardization of the Leiter-3, which is a completely nonverbal cognitive battery, to investigate the nature of sex/gender (we used sex/gender to reflect the awareness that the effects of biological 'sex' and socially constructed 'gender' cannot be easily separated and that most individuals' identities are informed by both sex and gender) differences. In doing so we used a multigroup confirmatory factor analysis approach. Results confirmed that males and females perform similarly in general intelligence, but present with some specificities. Males perform better on some, but not all, tasks requiring the spatial manipulation of the stimuli, but females consistently outperform males in tasks such as the nonverbal Stroop, requiring inhibition and attention control to a larger extent. The clinical and practical implications of our findings are considerable. The identification of specific cognitive strengths and weaknesses in males and females underscores the importance of tailored approaches in clinical assessments and interventions.

Is personality reflected in the gestures of second language speakers?

Previous studies on gestures and personality suggest an ambiguous picture of the effects of the various personality dimensions on the different types of speech-gestures and adaptors. In foreign language learning an additional variable to take into account is proficiency, which some studies have shown to affect gestures. In this study, we explore how various intrinsic variables, including personality, proficiency, gender and age affect the gestures of 61 Cantonese speakers of English as a second language. Participants were asked to narrate a video cartoon. Their proficiency and the frequency of gestures produced was based on those narrations. A functional categorization of gestures was followed, dividing them into semantic and discursive, and that also noted adaptors and micro-gestures, referred to as "flutters." Personality was self-reported using the 44 question Big-Five inventory. Correlations and a series of generalized linear models were developed to explore the interplay between variables. Agreeableness was found to be positively correlated with semantic gestures; and neuroticism and age were negatively correlated with flutter duration. Contrary to the findings from previous studies, no significant relationships were found between neuroticism and adaptors or semantic gestures, nor between extraversion or openness and semantic gestures. Proficiency and gender had little effect on gestures. As personality has been shown to be an important factor in gesture production in mother tongue speakers, we expected to also see a similar result with foreign language speakers, this not being so suggests that other variables, aside from those tested, should be considered. In particular, the results suggest that emotion and emotional constructs, such as anxiety, self-confidence or empathy, might have a greater impact on gesture production than proficiency or personality, a point which should be taken into account especially in language evaluation contexts or professional contexts with second language speakers.

The relation between number line performance and mathematics outcomes: Two meta-analyses

Understanding the magnitudes represented by numerals is a core component of early mathematical development and is often assessed by accuracy in situating numerals and fractions on a number line. Performance on these measures is consistently related to performance in other mathematics domains, but the strength of these relations may be overestimated because general cognitive ability has not been fully controlled in prior studies. The first of two meta-analyses (162 studies, 33,101 participants) confirmed a relation between performance on whole number (r = 0.33) and fractions number (r = 0.41) lines and overall mathematics performance. These relations were generally consistent across content domains (e.g., algebra and computation) and other moderators. The second (71 studies, 14,543 participants) used meta-analytic structural equation modeling to confirm these relations while controlling general cognitive ability (defined by IQ and working memory measures) and, in one analysis, general mathematics competence. The relation between number line performance and general mathematics competence remained significant but reduced (β = 0.13). Controlling general cognitive ability, whole number line performance consistently predicted competence with fractions but not performance on numeracy or computations measures. The results suggest an understanding of the magnitudes represented by whole numbers might be particularly important for students' fractions learning. RESEARCH HIGHLIGHTS: Two meta-analyses examined the link between the number line and mathematics performance. The first revealed significant relations across domains (e.g., algebra and computation). The second controlled for general cognitive ability and resulted in reduced but still significant relations. The relation between number line and fractions performance was stronger than relations to other domains.

Method considerations for school psychology from longitudinal research on gifted students

This article draws from longitudinal research on gifted students to provide method considerations for school psychology research. First, we provide some background of gifted and talented education in the United States. Then, drawing from multiple longitudinal samples of gifted students, in particular the Study of Mathematically Precocious Youth (SMPY), we illustrate the role of replications, including constructive replications. In the middle two sections, we highlight methodological design features focused first on predictors, and then on outcomes, considering types, magnitude, and breadth. Finally, we provide additional considerations and future directions, including expanding the outcome domain, overcoming the limitations of past gifted and talented research studies, and suggesting possibilities for future research. Our article may help improve school psychology research as well as assist school psychology researchers interested in conducting their own longitudinal studies using gifted samples.

Evidence for an amodal domain-general object recognition ability

A general object recognition ability predicts performance across a variety of high-level visual tests, categories, and performance in haptic recognition. Does this ability extend to auditory recognition? Vision and haptics tap into similar representations of shape and texture. In contrast, features of auditory perception like pitch, timbre, or loudness do not readily translate into shape percepts related to edges, surfaces, or spatial arrangement of parts. We find that an auditory object recognition ability correlates highly with a visual object recognition ability after controlling for general intelligence, perceptual speed, low-level visual ability, and memory ability. Auditory object recognition was a stronger predictor of visual object recognition than all control measures across two experiments, even though those control variables were also tested visually. These results point towards a single high-level ability used in both vision and audition. Much work highlights how the integration of visual and auditory information is important in specific domains (e.g., speech, music), with evidence for some overlap of visual and auditory neural representations. Our results are the first to reveal a domain-general ability, o, that predicts object recognition performance in both visual and auditory tests. Because o is domain-general, it reveals mechanisms that apply across a wide range of situations, independent of experience and knowledge. As o is distinct from general intelligence, it is well positioned to potentially add predictive validity when explaining individual differences in a variety of tasks, above and beyond measures of common cognitive abilities like general intelligence and working memory.

Vocational Interests and Teaching Preferences: Who Prefers Which Teaching Topic in the Nature-Human-Society Subject?

This study focuses on the vocational interests of trainee teachers for kindergarten and primary school, investigating whether the RIASEC-interest dimensions are related to teaching preferences in the Swiss subject of Nature-Human-Society, which is characterized by its multidisciplinarity. Interests are a source of individual differences in people and important to study since they influence intrinsic motivation, and thus, behavior, effort, and occupational decisions. The results of the conducted survey, composed of the Nature-Human-Society questionnaire and the general interest structure test (AIST-R), show, in a sample of 220 participants, that trainee teachers' vocational interests were partly related to their previous experiences in the specific content domains of Nature-Human-Society and slightly differed by gender. The RIASEC interest dimensions of social, investigative, realistic, and partly artistic evidence significant correlations with preferences in the teaching topics of the Nature-Human-Society subject. It became clear that trainee teachers with high realistic and investigative interests and low social and artistic interests tended to prefer thing-related teaching topics, while pronounced social and artistic interests with low realistic and investigative interests were associated with teaching preferences for people-related topics in the subject of Nature-Human-Society. The dominant role of Prediger's people- versus thing-related interest orientation could thus also be confirmed in the choice of favorite teaching topics, signaling that teachers feel comfortable with those topics that match their interest structure.

The Garden of Forking Paths; An Evaluation of Joseph's 'A Reevaluation of the 1990 "Minnesota Study of Twins Reared Apart" IQ Study'

Joseph has written what purports to be a refutation of studies of Twins Reared-Apart (TRAs) with a singular focus on the Minnesota Study of Twins Reared-Apart (MISTRA). I show, in detail, that (a) his criticisms of previous TRA studies depend on sources that were discredited prior to MISTRA, as they all failed the test of replicability, (b) the list of biases he uses to invalidate MISTRA do not support his arguments, (c) the accusations of questionable research practices are unsubstantiated, (d) his claim that MISTRA should be evaluated in the context of psychology's replication crisis is refuted. The TRA studies are constructive replications. Like many other scholars, past and present, he has been misled by the variation introduced by small samples (sampling error) and the distortion created by walking in the garden of forking paths. His endeavor is a concatenation of elision and erroneous statistical/scientific reasoning.

Prospective Teachers’ Beliefs About Human Intelligence in a Turkish Sample

Research consistently reports a moderate to a strong relationship between intelligence and academic performance. For about a century, the concept of intelligence has often been used in the definition of giftedness and the identification of gifted students along with other data sources, although some experts are against it. An understanding of prospective teachers' beliefs about intelligence is important to unearth how they perceive intelligence and giftedness. We replicated Warne and Burton's (2020) study with 157 prospective Turkish teachers. They were selected using an online convenience sampling method from various departments of a faculty of education. Of the participants, 72.6% were female and 27.4% were male. We adapted Warne and Burton’s (2020) survey, translating it to Turkish and administered it online to understand the prospective teachers’ beliefs about intelligence as well as to examine if these beliefs differ across cultures. We found that the prospective teachers’ understanding was mostly in line with the original study as well as the mainstream views of intelligence. We also found similar results to the original study, regarding the components of intelligence. Like the original study, the Turkish sample showed an understanding of the relationship between education and intelligence; however, the items about biological and genetic influences on intelligence, the plausible causes of group differences, the life outcomes of intelligence, and a cross-cultural comparison of intelligence had a low response uniformity in both studies. Similar findings across samples may be attributed to common, popular views as well as similar textbooks or other resources used in both cultures. The samples (e.g., educational level and age) may be partially responsible for the differences in the findings across both cultures.

Analysing the Impact of Social Media on Students’ Academic Performance: A Comparative Study of Extraversion and Introversion Personality

The advent of technology in education has seen a revolutionary change in the teaching–learning process. Social media is one such invention which has a major impact on students’ academic performance. This research analyzed the impact of social media on the academic performance of extraversion and introversion personality students. Further, the comparative study between these two personalities will be analysed on education level (postgraduate and undergraduate) and gender (male and female). The research was initiated by identifying the factors of social media impacting students’ academic performance. Thereafter, the scale was developed, validated and tested for reliability in the Indian context. Data were collected from 408 students segregated into 202 males and 206 females. Two hundred and thirty-four students are enrolled in postgraduation courses, whereas 174 are registered in the undergraduate programme. One-way ANOVA has been employed to compare the extraversion and introversion students of different education levels and gender. A significant difference is identified between extraversion and introversion students for the impact of social media on their academic performance.

Interest-Ability Profiles: An Integrative Approach to Knowledge Acquisition

Cognitive abilities and interests both play an important role in guiding knowledge acquisition, but most previous studies have examined them separately. The current study used a large and representative dataset to integrate interests and abilities using a person-centered approach that examines how distinct profiles of interests and abilities relate to individual strengths and weaknesses in knowledge. Two key findings emerged. First, eight interest–ability profiles were generated from Latent Profile Analysis (LPA), which replicated and extended the interrelations of interests and abilities found in previous studies using variable-centered approaches. Second, each profile’s strongest knowledge scores corresponded to their strongest abilities and interests, highlighting the importance of interest–ability profiles for guiding the development of knowledge. Importantly, in some domains, the lower ability profiles were actually more knowledgeable than higher ability profiles. Overall, these findings suggest that people learn best when given opportunities to acquire knowledge relevant to both their interests and abilities. We discuss how interest–ability profiles inform integrative theories of psychological development and present implications for education and career development.

Characterizing and comparing adaptive and academic functioning in children with low average and below average intellectual abilities

Objective The recent American Academy of Clinical Neuropsychology (AACN) consensus statement on uniform labeling of performance test scores places children who were previously characterized as having "borderline intellectual functioning" within the low average (LA; full scale intellectual quotient (FSIQ) between 80-89) or below average (BA; FSIQ between 70-79) categories. Given limited research examining functional differences across FSIQ groups using AACN's uniform labeling, this study examined adaptive and academic functioning by FSIQ group in youth referred for (neuro)psychological evaluation. Primary comparisons of interest were between LA and BA groups. MethodParticipants were 2,516 children between 6 to 13 years with standardized measures of intellectual, adaptive, and academic functioning. Participants were included if their FSIQ ranged from average to exceptionally low. Group differences in adaptive functioning and academic achievement were examined. ResultsThe LA group did not differ from the BA group in overall adaptive functioning and several domains of adaptive functioning (i.e. social, practical), but demonstrated slightly stronger adaptive skills in the conceptual domain. While the LA group evidenced slightly better word reading and math computation scores than the BA group, these statistically significant differences were not clinically -meaningful. ConclusionsIn this clinically referred sample, children with LA and BA intellectual abilities demonstrated similar adaptive skills, but slightly different academic achievement. Both groups demonstrated lower adaptive and academic functioning than children with average range FSIQs. These results suggest that adaptive functioning should be assessed during (neuro)psychological evaluations even when children do not have extremely low FSIQs.

Sex differences in adolescents' occupational aspirations: Variations across time and place

We investigated sex differences in 473,260 adolescents’ aspirations to work in things-oriented (e.g., mechanic), people-oriented (e.g., nurse), and STEM (e.g., mathematician) careers across 80 countries and economic regions using the 2018 Programme for International Student Assessment (PISA). We analyzed student career aspirations in combination with student achievement in mathematics, reading, and science, as well as parental occupations and family wealth. In each country and region, more boys than girls aspired to a things-oriented or STEM occupation and more girls than boys to a people-oriented occupation. These sex differences were larger in countries with a higher level of women’s empowerment. We explain this counter-intuitive finding through the indirect effect of wealth. Women’s empowerment is associated with relatively high levels of national wealth and this wealth allows more students to aspire to occupations they are intrinsically interested in. Implications for better understanding the sources of sex differences in career aspirations and associated policy are discussed.

Personality Changes Predict Early Career Outcomes: Discovery and Replication in 12-Year Longitudinal Studies

In this research, we examined whether personality changes from adolescence to young adulthood predicted five early career outcomes: degree attainment, income, occupational prestige, career satisfaction, and job satisfaction. The study used two representative samples of Icelandic youth (Sample 1: n = 485, Sample 2: n = 1,290) and measured personality traits over 12 years (ages ~17 to 29 years). Results revealed that certain patterns of personality growth predicted career outcomes over and above adolescent trait levels and crystallized ability. Across both samples, the strongest effects were found for growth in emotional stability (income and career satisfaction), conscientiousness (career satisfaction), and extraversion (career satisfaction and job satisfaction). Initial trait levels also predicted career success, highlighting the long-term predictive power of personality. Overall, our findings show that personality has important effects on early career outcomes-both through stable trait levels and how people change over time. We discuss implications for public policy, for theoretical principles of personality development, and for young people making career decisions.

General or Vocational Education? The Role of Vocational Interests in Educational Decisions at the End of Compulsory School in Switzerland

Many educational systems are characterized by segregation between a general and vocational educational track. When adolescents must decide on their postcompulsory education at the end of lower secondary school, the different programs are typically embedded in one of these two main tracks. Prior career choice theories postulate that vocational interests, as structured by the six-dimensional RIASEC model of Holland (1997), play a crucial role in educational and vocational transition processes. However, regarding the question of general versus vocational education, previous studies have mainly focused on the effects of social background. Therefore, this paper examines the impact of vocational interests on the choice of Baccalaureate School (BAC, general track), Vocational Education and Training (VET, vocational track) or the Federal Vocational Baccalaureate (FVB), a hybrid qualification that links elements of both tracks. The sample consists of N = 609 students at the end of lower secondary school in Switzerland. The results of multinomial logistic regression analyses show that all six dimensions of Holland's interest model are significant predictors for the three postcompulsory tracks, even when controlling for school variables (e.g., grades) and variables of social background. While the realistic and social dimensions are positively interrelated with the choice of VET, the artistic, investigative and enterprising dimensions predict the choice of BAC. The conventional dimension is the only one positively linked to the choice of FVB. The results are discussed with special attention to segregation between more practical and more theoretical types of interests.

Individual differences in the Müller-Lyer and Ponzo illusions are stable across different contexts

Vision scientists have attempted to classify visual illusions according to certain aspects, such as brightness or spatial features. For example, Piaget proposed that visual illusion magnitudes either decrease or increase with age. Subsequently, it was suggested that illusions are segregated according to their context: real-world contexts enhance and abstract contexts inhibit illusion magnitudes with age. We tested the effects of context on the Müller-Lyer and Ponzo illusions with a standard condition (no additional context), a line-drawing perspective condition, and a real-world perspective condition. A mixed-effects model analysis, based on data from 76 observers with ages ranging from 6 to 66 years, did not reveal any significant interaction between context and age. Although we found strong intra-illusion correlations for both illusions, we found only weak inter-illusion correlations, suggesting that the structure underlying these two spatial illusions includes several specific factors.

We Can Do That? Technological Advances in Interest Assessment

Technology holds the promise of greatly altering the conduct of interest assessment. I review five technological advances that currently exist and present how they can be incorporated into our interest measures and procedures: (a) dynamic assessment using item response theory, (b) adapting interpretations to individual users, (c) incorporating response latency, (d) gamification of interest measures, and (e) incorporating big data and machine learning. Using these advances in our assessments and procedures can structurally change what we do and enhance the precision of our measures.

A dual-pathway model of knowledge exchange: linking human and psychosocial capital with prosocial knowledge effectiveness

Purpose

This study aims to examine a dual-pathway model that recognizes two distinct (formal and informal) but complementary mechanisms of knowledge exchanges – knowledge sharing and knowledge helping. It also investigates how team members use their limited human and psychosocial capital for prosocial knowledge effectiveness.

Design/methodology/approach

A survey-based approach was used to examine the hypotheses of the study. A moderated-mediation model was proposed and tested using bootstrap approach.

Findings

Knowledge sharing and knowledge helping were found to be the significant links through which human capital (capability) and psychosocial capital (motivation and efficacy) significantly predict prosocial knowledge effectiveness. Post hoc analysis suggests that human capital through knowledge sharing influences team learning, whereas the psychosocial capital through knowledge helping influences team leadership.

Originality/value

The present study found two distinct but complementary and yet necessary mechanisms of knowledge exchanges to be linked as the important outlay for the human and psychosocial capital to be effective in the prosocial knowledge behaviours.

The factorial structure of individual differences in visual perception

Although at first glance the way we perceive the world is similar for most individuals and resembles a veridical interpretation of the environment, the persistent individual differences found in many perceptual processes continue to inspire and confuse researchers. Despite numerous attempts to map out the reliable factors and correlates of individual variance in perception, the factorial structure of vision has remained elusive. The current article reviews recent developments in the study of individual differences in perception with a focus on work that has applied latent variable techniques for analysing performance across multiple visual paradigms. As this overview reveals, studies that have attempted to answer the question whether one general or several specific factors best describe vision tend to reject the monolithic view. Some general notes are also provided regarding pitfalls that should be taken into account when designing such research in the future.

The cingulum as a marker of individual differences in neurocognitive development

The canonical approach to exploring brain-behaviour relationships is to group individuals according to a phenotype of interest, and then explore the neural correlates of this grouping. A limitation of this approach is that multiple aetiological pathways could result in a similar phenotype, so the role of any one brain mechanism may be substantially underestimated. Building on advances in network analysis, we used a data-driven community-clustering algorithm to identify robust subgroups based on white-matter microstructure in childhood and adolescence (total N = 313, mean age: 11.24 years). The algorithm indicated the presence of two equal-size groups that show a critical difference in fractional anisotropy (FA) of the left and right cingulum. Applying the brain-based grouping in independent samples, we find that these different 'brain types' had profoundly different cognitive abilities with higher performance in the higher FA group. Further, a connectomics analysis indicated reduced structural connectivity in the low FA subgroup that was strongly related to reduced functional activation of the default mode network. These results provide a proof-of-concept that bottom-up brain-based groupings can be identified that relate to cognitive performance. This provides a first demonstration of a complimentary approach for investigating individual differences in brain structure and function, particularly for neurodevelopmental disorders where researchers are often faced with phenotypes that are difficult to define at the cognitive or behavioural level.

Retest effects in working memory capacity tests: A meta-analysis

The repeated administration of working memory capacity tests is common in clinical and research settings. For cognitive ability tests and different neuropsychological tests, meta-analyses have shown that they are prone to retest effects, which have to be accounted for when interpreting retest scores. Using a multilevel approach, this meta-analysis aims at showing the reproducibility of retest effects in working memory capacity tests for up to seven test administrations, and examines the impact of the length of the test-retest interval, test modality, equivalence of test forms and participant age on the size of retest effects. Furthermore, it is assessed whether the size of retest effects depends on the test paradigm. An extensive literature search revealed 234 effect sizes from 95 samples and 68 studies, in which healthy participants between 12 and 70 years repeatedly performed a working memory capacity test. Results yield a weighted average of g = 0.28 for retest effects from the first to the second test administration, and a significant increase in effect sizes was observed up to the fourth test administration. The length of the test-retest interval and publication year were found to moderate the size of retest effects. Retest effects differed between the paradigms of working memory capacity tests. These findings call for the development and use of appropriate experimental or statistical methods to address retest effects in working memory capacity tests.

Using Standardized Test Scores to Include General Cognitive Ability in Education Research and Policy

In education research and education policy, much attention is paid to schools, curricula, and teachers, but little attention is paid to the characteristics of students. Differences in general cognitive ability (g) are often overlooked as a source of important variance among schools and in outcomes among students within schools. Standardized test scores such as the SAT and ACT are reasonably good proxies for g and are available for most incoming college students. Though the idea of g being important in education is quite old, we present contemporary evidence that colleges and universities in the United States vary considerably in the average cognitive ability of their students, which correlates strongly with other methods (including international methods) of ranking colleges. We also show that these g differences are reflected in the extent to which graduates of colleges are represented in various high-status and high-income occupations. Finally, we show how including individual-level measures of cognitive ability can substantially increase the statistical power of experiments designed to measure educational treatment effects. We conclude that education policy researchers should give more consideration to the concept of individual differences in cognitive ability as well as other factors.

STEM Interest Complexity Inventory Short Form With IRT and DIF Applications

The 127-item Science, Technology, Engineering, Mathematics (STEM) Interest Complexity Inventory and 15-item General STEM Interests Scale, each of which were previously developed to assess interests toward increasingly complex tasks, were shortened to 37-item and 12-item measures. Item response theory analyses employed on the data of 930 students in STEM majors indicated items with higher discrimination parameters and equivalent functioning across genders. The short form (SF) supported a four-factor structure of interests toward interacting with numerical data, symbolic data, spatial data, and STEM-related ideas. Concurrent criterion–related validation was supported with relevant vocational fit criteria. Hierarchical regression analysis revealed that STEM interest complexity added incremental variance over achievement motivation and test anxiety in predicting fit. Measurement invariance was demonstrated across samples from Turkey and the United States. The STEM Interest Complexity Inventory SF is a valid measure of vocational interests for research at the college level. Validities with high school and working samples are yet to be demonstrated.

A meta-analytic investigation of demographic differences in protean, boundaryless, and proactive career orientations

Purpose

The protean and boundaryless career concepts have dominated recent career research. Demographic groups are posited to differ on these “new career orientations,” with implications for career development and social equity. The purpose of this paper is to test these hypotheses by systematically reviewing research on demographic differences in new career orientations.

Design/methodology/approach

This paper meta-analyzes demographic differences in protean, boundaryless, and proactive career orientations using data from 29,605 individuals (74 samples).

Findings

Demographic differences in new career orientations are generally negligible to small, with organizational mobility preferences showing the largest differences across demographic characteristics. Age showed curvilinear relations with new career orientations. National economic development moderated new career orientation-educational level relations.

Research limitations/implications

Results support the construct validity of “proactive career orientation” as a unifying construct encompassing protean and psychological mobility boundaryless orientations (cf. Wiernik and Kostal, 2017). Future research should continue to explore career development in diverse economic/cultural contexts.

Practical implications

Small demographic differences suggest that potential benefits of new career orientations are not limited to members of particular groups. Age and education relations were large enough to indicate that large population segments may benefit from additional interventions to support career mobility and development.

Originality/value

This paper uses meta-analytic techniques to investigate demographic differences in career orientations with larger samples than possible in a single primary study. The meta-analytic design permitted investigation of a variety of methodological and cultural/economic moderators not previously considered in career orientation research.

University students' cognitive performance under temperature cycles induced by direct load control events

As one of the most common strategies for managing peak electricity demand, direct load control (DLC) of air-conditioners involves cycling the compressors on and off at predetermined intervals. In university lecture theaters, the implementation of DLC induces temperature cycles which might compromise university students' learning performance. In these experiments, university students' learning performance, represented by four cognitive skills of memory, concentration, reasoning, and planning, was closely monitored under DLC-induced temperature cycles and control conditions simulated in a climate chamber. In Experiment 1 with a cooling set point temperature of 22°C, subjects' cognitive performance was relatively stable or even slightly promoted by the mild heat intensity and short heat exposure resulting from temperature cycles; in Experiment 2 with a cooling set point of 24°C, subjects' reasoning and planning performance observed a trend of decline at the higher heat intensity and longer heat exposure. Results confirm that simpler cognitive tasks are less susceptible to temperature effects than more complex tasks; the effect of thermal variations on cognitive performance follows an extended-U relationship with performance being relatively stable across a range of temperatures. DLC appears to be feasible in university lecture theaters if DLC algorithms are implemented judiciously.

Culture and the Individual

In this paper, I want to suggest a framework for the study of action that does notturn ‘culture’ and ‘psychological phenomena’ into two sides ofa dichotomy, but which is sensitive to the context of action. This is called for in view of what seem to be genuinely interesting developments in our thinking about ourselves: for example,theoretical and empirical attempts to re-unite brain, body, words and world in such a way thatit is no longer interesting to speculate merely about what is ‘in’, and opposed towhat is ‘outside’, the individual. Briefly, I propose a definition of culture thatseems to offer productive empirical possibilities. After this I suggest an empirical focus on task, participant(s) and situation, by way of explicating the resources and constraints operating during action-in-context.

Integrating Abilities and Interests in Career Choice: Maximal versus Typical Assessment

The present article focuses on ways in which structural information from the ability and interest domains can be usefully integrated to inform career development and choice processes as well as allied research. Examining the structural models in these two domains, in addition to the distinction between maximal and typical assessment, the authors suggest that self-assessments of ability/self-efficacy have greater utility than assessments of maximal ability for informing career exploration and choice. Given this, they note several ways that self-ratings of ability can be integrated with interest information in clinical settings. In the second section, they focus on the definition of the general factor in vocational interest data. The authors hypothesize that this factor can be interpreted as interest flexibility and is particularly salient as a moderator in the person-environment fit-career outcome relation. They then propose a number of testable hypotheses relevant to this relation.

Countries with Higher Levels of Gender Equality Show Larger National Sex Differences in Mathematics Anxiety and Relatively Lower Parental Mathematics Valuation for Girls

Despite international advancements in gender equality across a variety of societal domains, the underrepresentation of girls and women in Science, Technology, Engineering, and Mathematics (STEM) related fields persists. In this study, we explored the possibility that the sex difference in mathematics anxiety contributes to this disparity. More specifically, we tested a number of predictions from the prominent gender stratification model, which is the leading psychological theory of cross-national patterns of sex differences in mathematics anxiety and performance. To this end, we analyzed data from 761,655 15-year old students across 68 nations who participated in the Programme for International Student Assessment (PISA). Most importantly and contra predictions, we showed that economically developed and more gender equal countries have a lower overall level of mathematics anxiety, and yet a larger national sex difference in mathematics anxiety relative to less developed countries. Further, although relatively more mothers work in STEM fields in more developed countries, these parents valued, on average, mathematical competence more in their sons than their daughters. The proportion of mothers working in STEM was unrelated to sex differences in mathematics anxiety or performance. We propose that the gender stratification model fails to account for these national patterns and that an alternative model is needed. In the discussion, we suggest how an interaction between socio-cultural values and sex-specific psychological traits can better explain these patterns. We also discuss implications for policies aiming to increase girls' STEM participation.

Individual difference predictors of perceived organizational change fairness

Purpose

– The purpose of this paper is to examine how individual differences influence employees’ attitude toward organizational change. Specifically, the present study examined how and why proactive personality, dispositional resistance to change, and change self-efficacy influence employees’ perceived fairness about the organizational change.

Design/methodology/approach

– Structural equation modeling was utilized to analyze the survey data obtained from a sample of 140 food service employees after some organizational changes in leadership, menu offerings, and facilities.

Findings

– The results revealed support for two micromediational chains predicting change fairness: first, change self-efficacy leads to less uncertainty and second, dispositional resistance to change leads to less communication regarding change resulting in employees perceiving they have fewer opportunities to voice concerns about the changes.

Research limitations/implications

– The cross-sectional design prevents causal inferences and the generalizability of the present findings beyond similar samples experiencing similar changes is unknown. However, the predictions were based on theories that apply to all employees regardless of the changes or the employees’ occupations or workplace.

Social implications

– Employees with particular personality traits are more receptive to change, suggesting that organizations should consider the impact of individual differences when facing large-scale change. To ensure the success of organizational change, organizations should communicate with employees and encourage employee input before implementing change which in turn improves the chances that employees will have favorable reactions to the change.

Originality/value

– This is the first study to examine how and why individual difference variables influence employees’ perceptions about organizational change fairness.

Individual differences and potential absorptive capacity in joint project teams in the Nigerian upstream oil industry

Purpose

– The purpose of this study is to elucidate the factors that underlie the differences in individual absorptive capacity (ACAP) within the context of joint project teams, following the individual-level perspective on potential ACAP.

Design/methodology/approach

– The model was empirically validated through structural equation modeling conducted on a cross-sectional survey of 248 local team members of joint projects in the Nigerian upstream oil industry.

Findings

– Prior experience and learning goal orientation are positively associated with the ability to assimilate knowledge, whereas performance approach goal orientation and need for cognition are positively associated with the ability to recognize the value of knowledge. Surprisingly, no significant relationship exists between prior experience and ability to recognize the value of knowledge. In addition, the positive relationship between ability to recognize the value of knowledge and ability to assimilate knowledge is supported.

Originality/value

– This study contributes to the empirical justification of the role of individuals in acquiring and assimilating external knowledge, and extends classroom-based constructs (i.e. need for cognition and goal orientation) to the project domain.

Sex Differences in Variability in Vocational Interests: Evidence from Two Large Samples

Greater male variability has been established in cognitive abilities and physical attributes. This study investigated sex differences in variability in vocational interests with two large samples (N > 40 000 and N > 70 000). The results show that although men varied more in Realistic and Enterprising interests, women varied more in Artistic and Conventional interests. These differences in variability had considerable influence on the female–male tail ratios in vocational interests that have been found to contribute to reported gender disparities in certain fields of work and academic disciplines. Moreover, differences in means and variability interacted non–linearly in shaping tail–ratio imbalances. An age–specific analysis additionally revealed that differences in variability diminished with age: Older samples showed smaller differences in variance in Realistic, Artistic, and Social interests than younger samples. Thus, I found no evidence that greater male variability applies for vocational interests in general. Copyright © 2015 European Association of Personality Psychology

Study of Mathematically Precocious Youth After 35 Years: Uncovering Antecedents for the Development of Math-Science Expertise

This review provides an account of the Study of Mathematically Precocious Youth (SMPY) after 35 years of longitudinal research. Findings from recent 20-year follow-ups from three cohorts, plus 5- or 10-year findings from all five SMPY cohorts (totaling more than 5,000 participants), are presented. SMPY has devoted particular attention to uncovering personal antecedents necessary for the development of exceptional math-science careers and to developing educational interventions to facilitate learning among intellectually precocious youth. Along with mathematical gifts, high levels of spatial ability, investigative interests, and theoretical values form a particularly promising aptitude complex indicative of potential for developing scientific expertise and of sustained commitment to scientific pursuits. Special educational opportunities, however, can markedly enhance the development of talent. Moreover, extraordinary scientific accomplishments require extraordinary commitment both in and outside of school. The theory of work adjustment (TWA) is useful in conceptualizing talent identification and development and bridging interconnections among educational, counseling, and industrial psychology. The lens of TWA can clarify how some sex differences emerge in educational settings and the world of work. For example, in the SMPY cohorts, although more mathematically precocious males than females entered math-science careers, this does not necessarily imply a loss of talent because the women secured similar proportions of advanced degrees and high-level careers in areas more correspondent with the multidimensionality of their ability-preference pattern (e.g., administration, law, medicine, and the social sciences). By their mid-30s, the men and women appeared to be happy with their life choices and viewed themselves as equally successful (and objective measures support these subjective impressions). Given the ever-increasing importance of quantitative and scientific reasoning skills in modern cultures, when mathematically gifted individuals choose to pursue careers outside engineering and the physical sciences, it should be seen as a contribution to society, not a loss of talent.