1
|
Røsvoll Å, Rusten EH, Westerhausen R. Left-hand preference in visual artists: A pre-registered observational study on Instagram. Laterality 2024; 29:184-198. [PMID: 38415348 DOI: 10.1080/1357650x.2024.2315856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 01/16/2024] [Indexed: 02/29/2024]
Abstract
The notion of an increased incidence of left handers among architects and visual artists has inspired both scientific theory building and popular discussion. However, a systematic exploration of the available publications provides, at best, modest evidence for this claim. The present preregistered observational study was designed to reinvestigate the postulated association by examining hand preference of visual artists who share their artistic activities as short video clips ("reels") on the social media platform Instagram. Determining individual hand preference based on five reels for each of N = 468 artists, we identified 42 (8.97%) left handers, suggesting an incidence which is below but statistical comparable to the 10.6% expected for the general population (χ2 = 1.30; p = .25; Cohen's w = 0.05). Also, we did not find any support for the notion that the art created by left-handed artists is of higher quality than art of right handers, as no difference in public endorsement or interest were observed (reflected by the number of likes per post or account followers). Taken together, we do not find any support for difference in artistic engagement or quality between left and right handers.
Collapse
Affiliation(s)
- Åsne Røsvoll
- Department of Psychology, University of Oslo, Oslo, Norway
| | | | | |
Collapse
|
2
|
Interhemispheric functional connectivity and its relationships with creative problem solving. Neuroreport 2019; 30:415-420. [PMID: 30789389 DOI: 10.1097/wnr.0000000000001217] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Creative problem solving (CPS) is a particular mental process when people solve problems. Findings from previous research, which used functional MRI, showed that CPS could involve specific neural mechanisms. However, few studies have directly explored the changes of interhemispheric resting-state functional connectivity during CPS. Recently, a validated voxel-mirrored homotopic connectivity (VMHC) method has been widely used to calculate the interhemispheric resting-state functional connectivity. In this study, we recruited 60 participants and used a revised chunk decomposing task to estimate participants' individual differences during CPS. Then, the VMHC method was used to explore neural correlates underlying individual differences of CPS. Results showed that altered VMHC in the bilateral middle frontal gyrus/precentral gyrus, bilateral hippocampus/insula/amygdala, and bilateral fusiform gyrus/cerebellum/middle occipital gyrus was related to individual differences of CPS. These brain regions reflect the information integration of both hemispheres might be critical for CPS. Therefore, our results may shed light on the neural correlates of CPS.
Collapse
|
3
|
Tan EJ, Fletcher K, Rossell SL. Exploring the relationship between fantasy proneness and delusional beliefs in psychosis and non-clinical individuals. Psychiatry Res 2019; 272:80-85. [PMID: 30579186 DOI: 10.1016/j.psychres.2018.12.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/19/2018] [Accepted: 12/16/2018] [Indexed: 12/15/2022]
Abstract
Delusions are a core feature of psychopathology while fantasy proneness (FP) is a trait that describes a predisposition towards fantastical thinking, vivid mental imagery and an overactive imagination. The relationship between FP and delusional experiences has not yet been examined in the literature. The current study hypothesised that FP would be significantly associated with and predict delusion severity as well as the associated delusional distress, preoccupation and conviction. Ninety-five patients with current psychosis (schizophrenia and bipolar I disorder) were assessed for overall delusional severity using the PANSS (clinician-rated) and the Peters Delusions Inventory (PDI; self-report). FP was assessed using the Creative Experiences Questionnaire (CEQ). Forty-six healthy control participants also completed the PDI and CEQ. Significant positive correlations were observed between FP and delusion severity in both groups; and distress, preoccupation and conviction in patients only. Linear regression analyses, controlling for manic and depressive symptoms, revealed that greater FP predicted higher levels of severity, distress, preoccupation, and conviction associated with delusions in patients, and higher severity only in healthy controls. The findings highlight the role of specific cognitive biases in delusional experiences, and empirically support models of unusual belief formation and maintenance.
Collapse
Affiliation(s)
- Eric J Tan
- Centre for Mental Health, Swinburne University of Technology, Hawthorn, VIC, Australia; St Vincent's Mental Health Service, St Vincent's Hospital, Melbourne, VIC, Australia.
| | - Kathryn Fletcher
- Centre for Mental Health, Swinburne University of Technology, Hawthorn, VIC, Australia
| | - Susan L Rossell
- Centre for Mental Health, Swinburne University of Technology, Hawthorn, VIC, Australia; St Vincent's Mental Health Service, St Vincent's Hospital, Melbourne, VIC, Australia
| |
Collapse
|
4
|
Abstract
The association of music with madness is very longstanding. But is it more than myth, and if so what is the nature of this relationship? We tested the hypotheses that musicians possess greater schizotypy and symptoms of bipolar disorder. A total of 102 musicians were found to have greater positive and negative schizotypal traits when compared to matched norms on the shortened Oxford-Liverpool Inventory of Feelings and Experiences. Based on the Mood Disorder Questionnaire, 10.8% of musicians also met criteria for lifetime bipolar disorder. Rock musicians appeared to have greater symptoms than those performing in other musical genres.
Collapse
Affiliation(s)
- Oliver Mason
- School of Psychology,University of Surrey,Stag Hill,Guildford,Surrey
| | - Heidi Daniels
- School of Psychology,University of Surrey,Stag Hill,Guildford,Surrey
| |
Collapse
|
5
|
Iszáj F, Kapitány-Fövény M, Farkas J, Kökönyei G, Urbán R, Griffiths MD, Demetrovics Z. Substance Use and Psychological Disorders Among Art and Non-art University Students: an Empirical Self-Report Survey. Int J Ment Health Addict 2018; 16:125-135. [PMID: 29491769 PMCID: PMC5814514 DOI: 10.1007/s11469-017-9812-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Media stories often suggest that those working in the creative arts appear to use and abuse psychoactive substances. The aim of the present study was to analyze the relationship between the use of psychoactive substances and the presence of psychological disorders among art and non-art students. Questionnaires related to these two areas were completed by 182 art students in higher education and a control group of 704 non-art university students. To assess psychoactive substance use, a structured questionnaire including the Cannabis Abuse Screening Test (CAST) and the Alcohol Use Disorders Identification Test (AUDIT) was administered to participants. Psychological disorders were assessed using the Hungarian version of the Brief Symptom Inventory (BSI) and the Global Severity Index (GSI). After analyzing the data, significant differences were found between the two groups regarding their first use of psychoactive substances. Art students' current substance use was found to be significantly more frequent compared to the control group. In relation to psychological disorders, art students scored significantly higher on three scales of the BSI (i.e., psychoticism, hostility, and phobic anxiety). Overall, a significantly higher proportion of artists were labeled as "problematic" using the GSI. The results suggest that artists have a higher risk of both substance use and experiencing psychological disorders.
Collapse
Affiliation(s)
- Fruzsina Iszáj
- 1Department of Clinical Psychology and Addiction, Institute of Psychology, ELTE Eötvös Loránd University, Izabella utca 46, Budapest, 1064 Hungary
| | - Máté Kapitány-Fövény
- 1Department of Clinical Psychology and Addiction, Institute of Psychology, ELTE Eötvös Loránd University, Izabella utca 46, Budapest, 1064 Hungary.,2Department of Addictology, Faculty of Health Sciences, Semmelweis University, Budapest, Hungary.,Nyírő Gyula Hospital, National Institute of Psychiatry and Addictions, Budapest, Hungary
| | - Judit Farkas
- 1Department of Clinical Psychology and Addiction, Institute of Psychology, ELTE Eötvös Loránd University, Izabella utca 46, Budapest, 1064 Hungary.,Nyírő Gyula Hospital, National Institute of Psychiatry and Addictions, Budapest, Hungary
| | - Gyöngyi Kökönyei
- 1Department of Clinical Psychology and Addiction, Institute of Psychology, ELTE Eötvös Loránd University, Izabella utca 46, Budapest, 1064 Hungary
| | - Róbert Urbán
- 4Department of Personality and Clinical Psychology, Institute of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Mark D Griffiths
- 5Psychology Department, International Gaming Research Unit, Nottingham Trent University, 50 Shakespeare Street, Nottingham, UK
| | - Zsolt Demetrovics
- 1Department of Clinical Psychology and Addiction, Institute of Psychology, ELTE Eötvös Loránd University, Izabella utca 46, Budapest, 1064 Hungary
| |
Collapse
|
6
|
Hatzimanolis A, Avramopoulos D, Arking DE, Moes A, Bhatnagar P, Lencz T, Malhotra AK, Giakoumaki SG, Roussos P, Smyrnis N, Bitsios P, Stefanis NC. Stress-Dependent Association Between Polygenic Risk for Schizophrenia and Schizotypal Traits in Young Army Recruits. Schizophr Bull 2018; 44:338-347. [PMID: 29036523 PMCID: PMC5814832 DOI: 10.1093/schbul/sbx074] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Schizotypal personality traits may increase proneness to psychosis and likely index familial vulnerability to schizophrenia (SZ), implying shared genetic determinants with SZ. Here, we sought to investigate the contribution of common genetic risk variation for SZ on self-reported schizotypy in 2 ethnically homogeneous cohorts of healthy young males during compulsory military service, enrolled in the Athens Study of Proneness and Incidence of Schizophrenia (ASPIS, N = 875) and the Learning on Genetics of Schizophrenia Spectrum study (LOGOS, N = 690). A follow-up psychometric assessment was performed in a sub-sample of the ASPIS (N = 121), 18 months later at military service completion. Polygenic risk scores (PRS) for SZ were derived based on genome-wide association meta-analysis results from the Psychiatric Genomics Consortium. In the ASPIS, higher PRSSZ significantly associated with lower levels of positive (ie, perceptual distortions), disorganization and paranoid facets of schizotypy, whereas no association with negative (ie, interpersonal) facets was noted. Importantly, longitudinal data analysis in the ASPIS subsample revealed that PRSSZ was inversely associated with positive schizotypy at military induction (stressed condition) but not at follow-up (nonstressed condition), providing evidence for environmental rather than SZ-implicated genetic influences. Moreover, consistent with prior reports, PRSSZ was positively correlated with trait anxiety in the LOGOS and additionally the recruits with higher PRSSZ and trait anxiety exhibited attenuated paranoid ideation. Together, these findings do not support an etiological link between increased polygenic liability for SZ and schizotypy, suggesting that psychosocial stress or trait anxiety may impact schizotypal phenotypic expressions among healthy young adults not genetically predisposed to SZ.
Collapse
Affiliation(s)
- Alex Hatzimanolis
- Department of Psychiatry, National and Kapodistrian University of Athens School of Medicine, Eginition Hospital, Athens, Greece,Neurobiology Research Institute, Theodor-Theohari Cozzika Foundation, Athens, Greece
| | - Dimitrios Avramopoulos
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD,McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Dan E Arking
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Anna Moes
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Pallav Bhatnagar
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Todd Lencz
- Division of Psychiatry Research, The Zucker Hillside Hospital, Glen Oaks, NY,Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY,Departments of Psychiatry and Molecular Medicine, Hofstra University School of Medicine, Hempstead, NY
| | - Anil K Malhotra
- Division of Psychiatry Research, The Zucker Hillside Hospital, Glen Oaks, NY,Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY,Departments of Psychiatry and Molecular Medicine, Hofstra University School of Medicine, Hempstead, NY
| | | | - Panos Roussos
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY,Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY,Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY,Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY,James J. Peters Veterans Affairs Medical Center, Mental Illness Research Education and Clinical Center, Bronx, NY
| | - Nikolaos Smyrnis
- Department of Psychiatry, National and Kapodistrian University of Athens School of Medicine, Eginition Hospital, Athens, Greece
| | - Panos Bitsios
- Department of Psychiatry and Behavioral Sciences, University of Crete School of Medicine, Heraklion, Greece
| | - Nicholas C Stefanis
- Department of Psychiatry, National and Kapodistrian University of Athens School of Medicine, Eginition Hospital, Athens, Greece,Neurobiology Research Institute, Theodor-Theohari Cozzika Foundation, Athens, Greece,University Mental Health Research Institute, Athens, Greece,To whom correspondence should be addressed; Department of Psychiatry, National and Kapodistrian University of Athens School of Medicine, Eginition Hospital, 72 Vas. Sophias Avenue, 11528 Athens, Greece; tel: +30-210-7289128; fax: +30-210-7242020, e-mail:
| |
Collapse
|
7
|
Vellante F, Sarchione F, Ebisch SJH, Salone A, Orsolini L, Marini S, Valchera A, Fornaro M, Carano A, Iasevoli F, Martinotti G, De Berardis D, Di Giannantonio M. Creativity and psychiatric illness: A functional perspective beyond chaos. Prog Neuropsychopharmacol Biol Psychiatry 2018; 80:91-100. [PMID: 28689007 DOI: 10.1016/j.pnpbp.2017.06.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 06/14/2017] [Accepted: 06/29/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Federica Vellante
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy; Institute of Advanced Biomedical Technologies, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy; NHS, Department of Mental Health, Psychiatric Service of Diagnosis and Treatment, Hospital "G. Mazzini", Asl 4, Teramo, Italy
| | - Fabiola Sarchione
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Sjoerd J H Ebisch
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Anatolia Salone
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Laura Orsolini
- Polyedra Research Group, 64100 Teramo, Italy.; Villa S. Giuseppe Hospital, Hermanas Hospitalarias, Ascoli Piceno, Italy; School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK
| | - Stefano Marini
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | | | - Michele Fornaro
- New York State Psychiatric Institute (NYPSI), Columbia University, NYC, NY, USA
| | - Alessandro Carano
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy; NHS, Department of Mental Health, Psychiatric Service of Diagnosis and Treatment, Hospital "Maria SS del Soccorso", San Benedetto del Tronto, Italy
| | - Felice Iasevoli
- Polyedra Research Group, 64100 Teramo, Italy.; Laboratory of Molecular and Translational Psychiatry, Department of Neuroscience, Reproductive and Odontostomatogical Sciences, University of Naples "Federico II", Napoli, Italy
| | - Giovanni Martinotti
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Domenico De Berardis
- NHS, Department of Mental Health, Psychiatric Service of Diagnosis and Treatment, Hospital "G. Mazzini", Asl 4, Teramo, Italy; Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy.
| | - Massimo Di Giannantonio
- Department of Neurosciences Clinical Imaging, Chair of Psychiatry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| |
Collapse
|
8
|
Sala G, Signorelli M, Barsuola G, Bolognese M, Gobet F. The Relationship between Handedness and Mathematics Is Non-linear and Is Moderated by Gender, Age, and Type of Task. Front Psychol 2017. [PMID: 28649210 PMCID: PMC5465301 DOI: 10.3389/fpsyg.2017.00948] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The relationship between handedness and mathematical ability is still highly controversial. While some researchers have claimed that left-handers are gifted in mathematics and strong right-handers perform the worst in mathematical tasks, others have more recently proposed that mixed-handers are the most disadvantaged group. However, the studies in the field differ with regard to the ages and the gender of the participants, and the type of mathematical ability assessed. To disentangle these discrepancies, we conducted five studies in several Italian schools (total participants: N = 2,314), involving students of different ages (six to seventeen) and a range of mathematical tasks (e.g., arithmetic and reasoning). The results show that (a) linear and quadratic functions are insufficient for capturing the link between handedness and mathematical ability; (b) the percentage of variance in mathematics scores explained by handedness was larger than in previous studies (between 3 and 10% vs. 1%), and (c) the effect of handedness on mathematical ability depended on age, type of mathematical tasks, and gender. In accordance with previous research, handedness does represent a correlate of achievement in mathematics, but the shape of this relationship is more complicated than has been argued so far.
Collapse
Affiliation(s)
- Giovanni Sala
- Department of Psychological Sciences, University of LiverpoolLiverpool, United Kingdom
| | - Michela Signorelli
- Department of Oncology and Hemato-Oncology, University of MilanMilan, Italy
| | | | - Martina Bolognese
- Department of Oncology and Hemato-Oncology, University of MilanMilan, Italy
| | - Fernand Gobet
- Department of Psychological Sciences, University of LiverpoolLiverpool, United Kingdom
| |
Collapse
|
9
|
Iszáj F, Griffiths MD, Demetrovics Z. Creativity and Psychoactive Substance Use: A Systematic Review. Int J Ment Health Addict 2016. [DOI: 10.1007/s11469-016-9709-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
10
|
Life on the Left. Laterality 2016. [DOI: 10.1016/b978-0-12-801239-0.00010-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
11
|
Shobe E, Desimone K. Inconsistent handers show higher psychopathy than consistent handers. Laterality 2015; 21:143-60. [DOI: 10.1080/1357650x.2015.1089879] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
12
|
Thys E, Sabbe B, De Hert M. The assessment of creativity in creativity/psychopathology research - a systematic review. Cogn Neuropsychiatry 2014; 19:359-77. [PMID: 24512614 DOI: 10.1080/13546805.2013.877384] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
INTRODUCTION The possible link between creativity and psychopathology has been a long time focus of research up to the present day. However, this research is hampered by methodological problems, especially the definition and assessment of creativity. This makes interpretation and comparison of studies difficult and possibly accounts for the contradictory results of this research. METHODS In this systematic review of the literature, research articles in the field of creativity and psychopathology were searched for creativity assessment tools. The tools used in the collected articles are presented and discussed. RESULTS The results indicate that a multitude of creativity assessment tools were used, that many studies only used one tool to assess creativity and that most of these tools were only used in a limited number of studies. A few assessment tools stand out by a more frequent use, also outside psychopathological research, and more solid psychometric properties. CONCLUSION Most scales used to evaluate creativity have poor psychometric properties. The scattered methodology to assess creativity compromises the generalizability and validity of this research. The field should creatively develop new validated instruments.
Collapse
Affiliation(s)
- E Thys
- a University Psychiatric Centre KU Leuven , Kortenberg , Belgium
| | | | | |
Collapse
|
13
|
Lindell AK. On the interrelation between reduced lateralization, schizotypy, and creativity. Front Psychol 2014; 5:813. [PMID: 25120516 PMCID: PMC4112911 DOI: 10.3389/fpsyg.2014.00813] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/09/2014] [Indexed: 11/13/2022] Open
Affiliation(s)
- Annukka K Lindell
- School of Psychological Science, La Trobe University Melbourne, VIC, Australia
| |
Collapse
|
14
|
The relation between handedness indices and reproductive success in a non-industrial society. PLoS One 2013; 8:e63114. [PMID: 23704893 PMCID: PMC3660345 DOI: 10.1371/journal.pone.0063114] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Accepted: 04/02/2013] [Indexed: 11/19/2022] Open
Abstract
The evolution of handedness in human populations has intrigued scientists for decades. However, whether handedness really affects Darwinian fitness is unclear and not yet studied in a non-industrial society where selection pressures on health and handedness are likely to be similar to the situation in which handedness has evolved. We measured both hand preference and asymmetry of hand skill (speed of fine motor control, measured by a pegboard task, and accuracy of throwing), as they measure different aspects of handedness. We investigated the associations between both the direction (left versus right) and strength (the degree to which a certain preference or asymmetry in skill is manifested, independent of the direction) of handedness. We analyzed to what extent these measures predict the number of offspring and self-reported illness in a non-industrial society in Papua, Indonesia. As it is known that body height and fitness are correlated, data on body height was also collected. Due to low numbers of left-handers we could not investigate the associations between direction of hand preference and measures of Darwinian fitness. We found a positive association between strength of asymmetry of hand skill (pegboard) and the number of children men sired. We also found a positive association for men between strength of hand preference and number of children who died within the first three years of life. For women we found no such effects. Our results may indicate that strength of handedness, independent of direction, has fitness implications and that the persistence of the polymorphism in handedness may be ascribed to either balancing selection on strength of asymmetry of hand skill versus strength of hand preference, or sexual antagonistic selection. No relationships between health and handedness were found, perhaps due to disease related selective disappearance of subjects with a specific handedness.
Collapse
|
15
|
Shen W, Liu C, Zhang X, Zhao X, Zhang J, Yuan Y, Chen Y. Right Hemispheric Dominance of Creative Insight: An Event-Related Potential Study. CREATIVITY RESEARCH JOURNAL 2013. [DOI: 10.1080/10400419.2013.752195] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Michel GF, Nelson EL, Babik I, Campbell JM, Marcinowski EC. Multiple trajectories in the developmental psychobiology of human handedness. ADVANCES IN CHILD DEVELOPMENT AND BEHAVIOR 2013; 45:227-60. [PMID: 23865118 DOI: 10.1016/b978-0-12-397946-9.00009-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We show that handedness is a product of a multifaceted biosocial developmental process that begins prenatally and continues into adulthood. Although right-handedness predominates, handedness varies continuously across the population. Therefore, our phrase "multiple trajectories"refers to both differences in developmental pathways that can lead to similarities in handedness and similarities in pathways that can lead to differences in handedness. The task for the researcher is to identify how, when, and for what actions the trajectory of handedness development can be maintained or changed for an individual. Given the complexity of these developmental pathways, it is likely that the asymmetric sensorimotor activity that occurs during the development of handedness influences other hemispheric variations in neural processing. Indeed, researchers have investigated how handedness relates to cognitive, social, and emotional functioning because handedness represents different patterns of hemispheric specialization. Although the story of handedness development is not complete, it is well worth pursuing because it makes the development of brain-behavior relations more transparent, especially for hemispheric differences in function.
Collapse
Affiliation(s)
- George F Michel
- Psychology Department, University of North Carolina, Greensboro, NC, USA.
| | | | | | | | | |
Collapse
|
17
|
Alipour A, Akhondy N, Aerab-sheybani K. Relationship between handedness and thinking styles in female and male students. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.sbspro.2012.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
18
|
Sontam V, Christman SD. Semantic organisation and handedness: mixed-handedness is associated with more diffuse activation of ambiguous word associates. Laterality 2011; 17:38-50. [PMID: 21598173 DOI: 10.1080/1357650x.2010.529450] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Research indicates that there are individual differences in the flexibility and ease with which one retrieves and uses concepts stored in memory. Based on prior research suggesting that mixed-handedness is associated with greater cognitive flexibility, it was hypothesised that mixed-handers have access to a relatively diffuse associative network, where link strengths for closely related and distantly related concepts are not as disparate as in the case of strong-handers. This idea was explored using ambiguous words for stimuli, as ambiguous words are known to have both strong (concepts related via dominant meaning) and weak associates (concepts related via subordinate meaning). Consistent with the prediction, mixed-handers showed equal ease in accessing both strongly and weakly related concepts. In Experiment 1 mixed-handers exhibited equivalent priming for dominant and subordinate associates, while strong-handers exhibited priming for dominant associates only. In Experiment 2 ratings of strength of association for dominant versus subordinate associates were examined. Mixed-handedness was associated with lesser disparity of dominant and subordinate association ratings.
Collapse
|
19
|
Lindell AK. Lateral thinkers are not so laterally minded: Hemispheric asymmetry, interaction, and creativity. Laterality 2010; 16:479-98. [DOI: 10.1080/1357650x.2010.497813] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
20
|
Christman SD. The poetry of handedness. Laterality 2010; 15:651-8. [DOI: 10.1080/13576500903107817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
21
|
Abstract
The idea that handedness indicates something about a person's cognitive ability and personality is a perennial issue. A variety of models have been put forward to explain this relationship and predict a range of outcomes from higher levels of cognitive ability in left-handers or moderate right-handers to lower levels of achievement in left- or mixed-handers. We tested these models using a sample (n = 895) drawn from the BRAINnet database (www.brainnet.net). Participants completed a general cognitive ability (GCA) scale and a test of hand preference/performance. Moderate right-handers, as indexed by their performance measures, had higher GCA scores compared with strong left- or right-handers. The performance measure also showed lower levels of GCA for left-handers compared with right-handers. The hand preference data showed little or no association with cognitive ability-perhaps because this measure clusters individuals toward the extremes of the handedness distribution. While adding support to Annett's heterozygous advantage model, which predicts a cognitive disadvantage for strong left- or right-handers, the data also confirm recent research showing a GCA disadvantage for left-handers. Although this study demonstrates that handedness is related to cognitive ability, the effects are subtle and might only be identified in large-scale studies with sensitive measures of hand performance.
Collapse
|
22
|
Mihov KM, Denzler M, Förster J. Hemispheric specialization and creative thinking: a meta-analytic review of lateralization of creativity. Brain Cogn 2010; 72:442-8. [PMID: 20097463 DOI: 10.1016/j.bandc.2009.12.007] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Revised: 12/20/2009] [Accepted: 12/22/2009] [Indexed: 12/01/2022]
Abstract
In the last two decades research on the neurophysiological processes of creativity has found contradicting results. Whereas most research suggests right hemisphere dominance in creative thinking, left-hemisphere dominance has also been reported. The present research is a meta-analytic review of the literature to establish how creative thinking relates to relative hemispheric dominance. The analysis was performed on the basis of a non-parametric vote-counting approach and effect-size calculations of Cramer's phi suggest relative dominance of the right hemisphere during creative thinking. Moderator analyses revealed no difference in predominant right-hemispheric activation for verbal vs. figural tasks, holistic vs. analytical tasks, and context-dependent vs. context-independent tasks. Suggestions for further investigations with the meta-analytic and neuroscience methodologies to answer the questions of left hemispheric activation and further moderation of the effects are discussed.
Collapse
|
23
|
Influence of handedness and bilateral eye movements on creativity. Brain Cogn 2009; 71:204-14. [DOI: 10.1016/j.bandc.2009.08.017] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Revised: 08/10/2009] [Accepted: 08/27/2009] [Indexed: 11/21/2022]
|
24
|
Johnston DW, Nicholls MER, Shah M, Shields MA. Nature's experiment? Handedness and early childhood development. Demography 2009; 46:281-301. [PMID: 21305394 PMCID: PMC2831280 DOI: 10.1353/dem.0.0053] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In recent years, a large body of research has investigated the various factors affecting child development and the consequent impact of child development on future educational and labor market outcomes. In this article, we contribute to this literature by investigating the effect of handedness on child development. This is an important issue given that around 10% of the world's population is left-handed and given recent research demonstrating that child development strongly affects adult outcomes. Using a large, nationally representative sample of young children, we find that the probability of a child being left-handed is not significantly related to child health at birth, family composition, parental employment, or household income. We also find robust evidence that left-handed (and mixed-handed) children perform significantly worse in nearly all measures of development than right-handed children, with the relative disadvantage being larger for boys than girls. Importantly, these differentials cannot be explained by different socioeconomic characteristics of the household, parental attitudes, or investments in learning resources.
Collapse
Affiliation(s)
- David W Johnston
- School of Economics and Finance, Queensland University of Technology, Australia
| | | | | | | |
Collapse
|
25
|
Rubinstein G. Are schizophrenic patients necessarily creative? A comparative study between three groups of psychiatric inpatients. PERSONALITY AND INDIVIDUAL DIFFERENCES 2008. [DOI: 10.1016/j.paid.2008.08.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
26
|
Abstract
BACKGROUND Environmental risk during fetal development for non-right-handedness, an index of brain asymmetry, and its relevance for child mental health is not fully understood. METHODS A Swedish population-based prospective pregnancy-offspring cohort was followed-up when children were five years old (N = 1714). Prenatal environmental risk exposures were the number of ultrasound examinations and maternal distress during pregnancy. Child mental health, including symptoms of attention deficit hyperactivity disorder (ADHD), language difficulties, and care-seeking for child behavior problems, was assessed via maternal and/or kindergarten teacher's ratings. RESULTS Prenatal exposure to maternal depressive symptoms and critical life events were associated with increased risk of child non-right-handedness and mixed handedness, after adjustment for parity, maternal age, birth outcomes, infant sex, and parental handedness. No association was found between handedness and number of ultrasound examinations. Non-right and mixed-handedness, rather than left-handedness, were associated with increased risk of language difficulties and particularly with ADHD symptoms, after adjustment for current parental ADHD symptoms, current maternal depressive symptoms, birth outcomes, smoking during pregnancy, depressive symptoms and critical life events. Problems were significant enough to prompt mothers to seek care for children's behavioral problems, and parents were more likely to have received advice from the children's kindergarten teachers to seek care. CONCLUSIONS This study suggests that mixed-handedness, i.e., reflecting atypical brain laterality, can be a marker of both severity of prenatal exposure to maternal distress and of increased risk of ADHD symptoms in childhood. Our results support the idea that the fetal environment plays a role in subsequent child mental health.
Collapse
Affiliation(s)
- Alina Rodriguez
- Department of Psychology, Uppsala University, Uppsala, Sweden.
| | | |
Collapse
|