1
|
Karamaouna P, Zouraraki C, Economou E, Kafetsios K, Bitsios P, Giakoumaki SG. Cold executive function processes and their hot analogs in schizotypy. J Int Neuropsychol Soc 2024; 30:285-294. [PMID: 37750805 DOI: 10.1017/s1355617723000590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
OBJECTIVE To examine cold (based on logical reasoning) versus hot (having emotional components) executive function processes in groups with high individual schizotypal traits. METHOD Two-hundred and forty-seven participants were administered the Schizotypal Personality Questionnaire and were allocated into schizotypal (cognitive-perceptual, paranoid, negative, disorganized) or control groups according to pre-specified criteria. Participants were also administered a battery of tasks examining working memory, complex selective attention, response inhibition, decision-making and fluid intelligence and their affective counterparts. The outcome measures of each task were reduced to one composite variable thus formulating five cold and five hot cognitive domains. Between-group differences in the cognitive domains were examined with repeated measures analyses of covariance. RESULTS For working memory, the control and the cognitive-perceptual groups outperformed negative schizotypes, while for affective working memory controls outperformed the disorganized group. Controls also scored higher compared with the disorganized group in complex selective attention, while both the control and the cognitive-perceptual groups outperformed negative schizotypes in complex affective selective attention. Negative schizotypes also had striking difficulties in response inhibition, as they scored lower compared with all other groups. Despite the lack of differences in fluid intelligence, controls scored higher compared with all schizotypal groups (except from cognitive-perceptual schizotypes) in emotional intelligence; the latter group reported higher emotional intelligence compared with negative schizotypes. CONCLUSION Results indicate that there is no categorical association between the different schizotypal dimensions with solely cold or hot executive function processes and support impoverished emotional intelligence as a core feature of schizotypy.
Collapse
Affiliation(s)
- Penny Karamaouna
- Laboratory of Neuropsychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
- University of Crete Research Center for the Humanities, the Social and Education Sciences (UCRC), University of Crete, Rethymno, Crete, Greece
| | - Chrysoula Zouraraki
- Laboratory of Neuropsychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
- University of Crete Research Center for the Humanities, the Social and Education Sciences (UCRC), University of Crete, Rethymno, Crete, Greece
| | - Elias Economou
- Laboratory of Experimental Psychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
| | | | - Panos Bitsios
- Department of Psychiatry and Behavioural Sciences, Faculty of Medicine, University of Crete, Heraklion, Crete, Greece
| | - Stella G Giakoumaki
- Laboratory of Neuropsychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
- University of Crete Research Center for the Humanities, the Social and Education Sciences (UCRC), University of Crete, Rethymno, Crete, Greece
| |
Collapse
|
2
|
Haenschel C, Krupic D, Hoff A, Corr PJ, Gaigg S, Fett AK. Comparing two measures of schizotypy and their relationship with psychological distress in British university students. Early Interv Psychiatry 2023; 17:1095-1106. [PMID: 36669849 DOI: 10.1111/eip.13404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 11/04/2022] [Accepted: 01/01/2023] [Indexed: 01/22/2023]
Abstract
AIMS Schizotypy reflects the vulnerability to schizophrenia in the general population. Different questionnaires have been developed to measure aspects of schizotypy. Higher schizotypy scores have also been linked with depression, anxiety, and stress sensitivity. Here we examine the associations of schizotypy with symptoms of depression and anxiety in a sample of university students, using two different measures (N = 271). METHODS A series of confirmatory factor analyses was used to examine two distinct and frequently employed measures of schizotypy: the Community Assessment of Psychic Experiences (CAPE), and the Schizotypy Personality Questionnaire (SPQ). We assessed their relationship with each other and their predictive validity for anxiety, depression, and stress sensitivity. RESULTS Our results indicated the brief 7-factor SPQ (SPQ-BR) factor solution for the SPQ and the 15-item and 3 factor solution for the CAPE (i.e., CAPE-P15) as best fitting models. Particularly the CAPE dimension of persecutory ideation was a strong predictor of anxiety, depression, and stress sensitivity, whereas the SPQ dimensions of no close friends and social anxiety predicted psychological distress and stress in our student sample. CONCLUSIONS Our findings extend earlier work in general and patient samples and point to the importance of understanding the contribution of particularly positive schizotypy symptoms and different interpersonal aspects to psychological distress.
Collapse
Affiliation(s)
| | - Dino Krupic
- Faculty of Humanities and Social Sciences, University in Osijek, Osijek, Croatia
| | - Antonia Hoff
- Department of Psychology, City, University of London, London, UK
| | - Philip J Corr
- Department of Psychology, City, University of London, London, UK
| | - Sebastian Gaigg
- Department of Psychology, City, University of London, London, UK
| | - Anne-Kathrin Fett
- Department of Psychology, City, University of London, London, UK
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| |
Collapse
|
3
|
Fekih-Romdhane F, Hakiri A, Stambouli M, Cherif W, Away R, Amri A, Cheour M, Hallit S. Schizotypal traits in a large sample of high-school and university students from Tunisia: correlates and measurement invariance of the arabic schizotypal personality questionnaire across age and sex. BMC Psychiatry 2023; 23:447. [PMID: 37340441 DOI: 10.1186/s12888-023-04942-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/08/2023] [Indexed: 06/22/2023] Open
Abstract
BACKGROUND The main goal of the present study was to examine the characteristics of schizotypal traits and their correlations with genetic (i.e., family history of mental illness), demographic (i.e., age, sex), environmental (e.g., income, urbanicity, tobacco/alcohol/cannabis use), and psychological (i.e., personal history of mental illness other than psychosis) factors in Tunisian high-school and university students. Our secondary goal was to contribute the literature by examining the factor structure and factorial invariance of the Arabic Schizotypal Personality Questionnaire (SPQ) across sex and age (adolescents [12-18 years] vs. young adults [18-35 years]) groups. METHOD This was a cross-sectional study involving 3166 students: 1160 (36.6%) high-school students (53.0% females, aged 14.9 ± 1.8); and 2006 (63.4%) university students (63.9% females, aged 21.8 ± 2.3). All students were asked to complete a paper-and-pencil self-administered questionnaire containing sociodemographic characteristics as well as the Arabic version of the SPQ. RESULTS The total sample yielded total SPQ scores of 24.1 ± 16.6 out of 74. The SPQ yielded good composite reliability as attested by McDonald's omega values ranging from .68 to .80 for all nine subscales. Confirmatory Factor Analysis indicated that fit of the 9-factor model of SPQ scores was acceptable. This model is invariant (at the configural, metric and structural levels) across sex and age. Except for "Odd or eccentric behavior", all schizotypy features were significantly higher among female students compared to males. Multivariable analyses showed that female sex, being a university student, lowest family incomes, tobacco use, and having a personal history of psychiatric illness were significantly associated with higher positive, negative and disorganized schizotypy subscales scores. CONCLUSION Future research still needs to confirm our findings and investigate the contribution of the identified factors in the development of clinical psychosis. We can also conclude that the Arabic SPQ is appropriate for measuring and comparing schizotypy across age and sex in clinical and research settings. These findings are highly relevant and essential for ensuring the clinical utility and applicability of the SPQ in cross-cultural research.
Collapse
Affiliation(s)
- Feten Fekih-Romdhane
- The Tunisian Center of Early Intervention in Psychosis, Department of Psychiatry "Ibn Omrane", Razi Hospital, 2010, Manouba, Tunisia.
- Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia.
| | - Abir Hakiri
- Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia
| | - Manel Stambouli
- Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia
| | - Wissal Cherif
- The Tunisian Center of Early Intervention in Psychosis, Department of Psychiatry "Ibn Omrane", Razi Hospital, 2010, Manouba, Tunisia
- Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia
| | - Rami Away
- Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia
| | - Amani Amri
- Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia
| | - Majda Cheour
- The Tunisian Center of Early Intervention in Psychosis, Department of Psychiatry "Ibn Omrane", Razi Hospital, 2010, Manouba, Tunisia
- Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia
| | - Souheil Hallit
- School of Medicine and Medical Sciences, Holy Spirit University of Kaslik, P.O. Box 446, Jounieh, Lebanon.
- Psychology Department, College of Humanities, Effat University, Jeddah, 21478, Saudi Arabia.
- Applied Science Research Center, Applied Science Private University, Amman, Jordan.
- Research Department, Psychiatric Hospital of the Cross, Jal Eddib, Lebanon.
| |
Collapse
|
4
|
Asimakidou E, Job X, Kilteni K. The positive dimension of schizotypy is associated with a reduced attenuation and precision of self-generated touch. SCHIZOPHRENIA (HEIDELBERG, GERMANY) 2022; 8:57. [PMID: 35854009 PMCID: PMC9261081 DOI: 10.1038/s41537-022-00264-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 06/08/2022] [Indexed: 02/01/2023]
Abstract
The brain predicts the sensory consequences of our movements and uses these predictions to attenuate the perception of self-generated sensations. Accordingly, self-generated touch feels weaker than an externally generated touch of identical intensity. In schizophrenia, this somatosensory attenuation is substantially reduced, suggesting that patients with positive symptoms fail to accurately predict and process self-generated touch. If an impaired prediction underlies the positive symptoms of schizophrenia, then a similar impairment should exist in healthy nonclinical individuals with high positive schizotypal traits. One hundred healthy participants (53 female), assessed for schizotypal traits, underwent a well-established psychophysics force discrimination task to quantify how they perceived self-generated and externally generated touch. The perceived intensity of tactile stimuli delivered to their left index finger (magnitude) and the ability to discriminate the stimuli (precision) was measured. We observed that higher positive schizotypal traits were associated with reduced somatosensory attenuation and poorer somatosensory precision of self-generated touch, both when treating schizotypy as a continuous or categorical variable. These effects were specific to positive schizotypy and were not observed for the negative or disorganized dimensions of schizotypy. The results suggest that positive schizotypal traits are associated with a reduced ability to predict and process self-generated touch. Given that the positive dimension of schizotypy represents the analogue of positive psychotic symptoms of schizophrenia, deficits in processing self-generated tactile information could indicate increased liability to schizophrenia.
Collapse
Affiliation(s)
- Evridiki Asimakidou
- Department of Neuroscience, Karolinska Institutet, Solnavägen 9, 17165, Stockholm, Sweden
| | - Xavier Job
- Department of Neuroscience, Karolinska Institutet, Solnavägen 9, 17165, Stockholm, Sweden
| | - Konstantina Kilteni
- Department of Neuroscience, Karolinska Institutet, Solnavägen 9, 17165, Stockholm, Sweden.
| |
Collapse
|
5
|
Moussa-Tooks AB, Bailey AJ, Bolbecker AR, Viken RJ, O’Donnell BF, Hetrick WP. Bifactor Structure of the Schizotypal Personality Questionnaire Across the Schizotypy Spectrum. J Pers Disord 2021; 35:513-537. [PMID: 32039649 PMCID: PMC7415588 DOI: 10.1521/pedi_2020_34_466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Despite widespread use in schizophrenia-spectrum research, uncertainty remains around an empirically supported and theoretically meaningful factor structure of the Schizotypal Personality Questionnaire (SPQ). Current identified structures are limited by reliance on exclusively nonclinical samples. The current study compared factor structures of the SPQ in a sample of 335 nonpsychiatric individuals, 292 schizotypy-spectrum individuals (schizophrenia, schizoaffective disorder, or schizotypal personality disorder), and the combined group (N = 627). Unidimensional, correlated, and hierarchical models were assessed in addition to a bifactor model, wherein subscales load simultaneously onto a general factor and a specific factor. The best-fitting model across samples was a two-specific factor bifactor model, consistent with the nine symptom dimensions of schizotypy as primarily a direct manifestation of a unitary construct. Such findings, for the first time demonstrated in a clinical sample, have broad implications for transdiagnostic approaches, including reifying schizotypy as a construct underlying diverse manifestations of phenomenology across a wide range of severity.
Collapse
Affiliation(s)
- Alexandra B. Moussa-Tooks
- Psychological & Brain Sciences, Indiana University Bloomington, Bloomington, Indiana,Program in Neuroscience, Indiana University Bloomington
| | - Allen J. Bailey
- Psychological & Brain Sciences, Indiana University Bloomington, Bloomington, Indiana
| | - Amanda R. Bolbecker
- Psychological & Brain Sciences, Indiana University Bloomington, Bloomington, Indiana,Larue D. Carter Memorial Hospital, Indianapolis, Indiana,Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana
| | - Richard J. Viken
- Psychological & Brain Sciences, Indiana University Bloomington, Bloomington, Indiana,Program in Neuroscience, Indiana University Bloomington
| | - Brian F. O’Donnell
- Larue D. Carter Memorial Hospital, Indianapolis, Indiana,Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana,Psychological & Brain Sciences, Indiana University Bloomington, Bloomington, Indiana,Program in Neuroscience, Indiana University Bloomington
| | - William P. Hetrick
- Psychological & Brain Sciences, Indiana University Bloomington, Bloomington, Indiana,Larue D. Carter Memorial Hospital, Indianapolis, Indiana,Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana,Program in Neuroscience, Indiana University Bloomington
| |
Collapse
|
6
|
Dong Y, Dumas D. Are personality measures valid for different populations? A systematic review of measurement invariance across cultures, gender, and age. PERSONALITY AND INDIVIDUAL DIFFERENCES 2020. [DOI: 10.1016/j.paid.2020.109956] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
7
|
Raballo A, Cicero DC, Kerns JG, Sanna S, Pintus M, Agartz I, Pintus E, Corrias I, Lai V, Petretto DR, Carta MG, Preti A. Tracking salience in young people: A psychometric field test of the Aberrant Salience Inventory (ASI). Early Interv Psychiatry 2019; 13:64-72. [PMID: 28719056 DOI: 10.1111/eip.12449] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 01/29/2017] [Accepted: 03/18/2017] [Indexed: 01/25/2023]
Abstract
AIM To explore the prevalence of Aberrant Salience (AS, an alleged experiential feature of psychosis-proneness) in Italian young people and corroborate the transcultural validity of the Aberrant Salience Inventory (ASI). METHODS Young adults attending an Italian university (n = 649) underwent serial evaluations with the ASI together with psychometric proxies for help seeking General Health Questionnaire and attenuated positive and negative symptoms Schizotypal Personality Questionnaire (SPQ). The distribution of ASI scores was explored with latent class analysis (LCA). RESULTS Reliability of the Italian version of the ASI (I-ASI) was acceptable for all subscales (ordinal alpha >.70). Concurrent validity was in the expected direction, with higher correlations with measures of attenuated positive symptoms vs negative symptoms of psychosis (Steigers' z test, P < .005 in all comparisons). LCA identified three classes, with 217 (33.4%) participants in the "high aberrant salience" class. Gender and age were not related to class membership. Compared to the baseline class, SPQ scores in the schizotypy range were more likely in the "high aberrant salience" class (OR = 39.1; 95%confidence interval: 5.30-288.1). CONCLUSION AS is a relatively common experience among Italian young people. The study also confirmed the validity of field-testing ASI as a tool for the real-world characterization of people with vulnerability to psychosis, such as symptomatic help seekers with clinical high-risk states.
Collapse
Affiliation(s)
- Andrea Raballo
- Norwegian Centre for Mental Disorders Research (NORMENT), KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo and Diakonjemmet Hospital, Oslo, Norway.,Department of Mental Health, Reggio Emilia, Reggio Emilia, Italy
| | - David C Cicero
- Department of Psychology, University of Hawai'i at Manoa, Honolulu, Hawaii
| | - John G Kerns
- Department of Psychological Sciences, University of Missouri, Columbia, Missouri
| | - Sara Sanna
- Section on Clinical Psychology, Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy
| | - Mirra Pintus
- Section on Clinical Psychology, Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy.,Center of Liaison Psychiatry and Psychosomatics, University Hospital, University of Cagliari, Cagliari, Italy
| | - Ingrid Agartz
- Norwegian Centre for Mental Disorders Research (NORMENT), KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo and Diakonjemmet Hospital, Oslo, Norway.,Department of Psychiatric Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Elisa Pintus
- Section on Clinical Psychology, Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy.,Center of Liaison Psychiatry and Psychosomatics, University Hospital, University of Cagliari, Cagliari, Italy
| | - Irene Corrias
- Section on Clinical Psychology, Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy.,Center of Liaison Psychiatry and Psychosomatics, University Hospital, University of Cagliari, Cagliari, Italy
| | - Veronica Lai
- Section on Clinical Psychology, Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy
| | - Donatella Rita Petretto
- Section on Clinical Psychology, Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy
| | - Mauro G Carta
- Center of Liaison Psychiatry and Psychosomatics, University Hospital, University of Cagliari, Cagliari, Italy
| | - Antonio Preti
- Section on Clinical Psychology, Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy.,Center of Liaison Psychiatry and Psychosomatics, University Hospital, University of Cagliari, Cagliari, Italy.,Department of Psychiatry, Genneruxi Medical Center, Cagliari, Italy
| |
Collapse
|
8
|
Fonseca-Pedrero E, Ortuño-Sierra J, Lucas-Molina B, Debbané M, Chan RCK, Cicero DC, Zhang LC, Brenner C, Barkus E, Linscott RJ, Kwapil T, Barrantes-Vidal N, Cohen A, Raine A, Compton MT, Tone EB, Suhr J, Bobes J, Fumero A, Giakoumaki S, Tsaousis I, Preti A, Chmielewski M, Laloyaux J, Mechri A, Lahmar MA, Wuthrich V, Larøi F, Badcock JC, Jablensky A, Barron D, Swami V, Tran US, Voracek M. Brief assessment of schizotypal traits: A multinational study. Schizophr Res 2018; 197:182-191. [PMID: 29113776 DOI: 10.1016/j.schres.2017.10.043] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/28/2017] [Accepted: 10/29/2017] [Indexed: 11/27/2022]
Abstract
The Schizotypal Personality Questionnaire-Brief (SPQ-B) was developed with the aim of examining variations in healthy trait schizotypy, as well as latent vulnerability to psychotic-spectrum disorders. No previous study has studied the cross-cultural validity of the SPQ-B in a large cross-national sample. The main goal of the present study was to analyze the reliability and the internal structure of SPQ-B scores in a multinational sample of 28,426 participants recruited from 14 countries. The mean age was 22.63years (SD=7.08; range 16-68years), 37.7% (n=10,711) were men. The omega coefficients were high, ranging from 0.86 to 0.92 for the total sample. Confirmatory factor analysis revealed that SPQ-B items were grouped either in a theoretical structure of three first-order factors (Cognitive-Perceptual, Interpersonal, and Disorganized) or in a bifactor model (three first-order factors plus a general factor of schizotypal personality). In addition, the results supported configural but not strong measurement invariance of SPQ-B scores across samples. These findings provide new information about the factor structure of schizotypal personality, and support the validity and utility of the SPQ-B, a brief and easy tool for assessing self-reported schizotypal traits, in cross-national research. Theoretical and clinical implications for diagnostic systems, psychosis models, and cross-national mental health strategies are derived from these results.
Collapse
Affiliation(s)
- Eduardo Fonseca-Pedrero
- Department of Educational Sciences, University of La Rioja, Logroño, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Oviedo, Spain.
| | | | - Beatriz Lucas-Molina
- Department of Developmental and Educational Psychology, University of Valencia, Valencia, Spain
| | - Martin Debbané
- Faculty of Psychology and Educational Sciences, University of Geneva, Geneva, Switzerland; Department of Clinical, Educational and Health Psychology, University College London, London, UK
| | - Raymond C K Chan
- Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - David C Cicero
- Department of Psychology, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Lisa C Zhang
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
| | - Colleen Brenner
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
| | - Emma Barkus
- School of Psychology, University of Wollongong, Wollongong, Australia
| | | | - Thomas Kwapil
- Department of Psychology, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Neus Barrantes-Vidal
- Department of Clinical and Health Psychology, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Alex Cohen
- Department of Psychology, Louisiana State University, Louisiana, LA, USA
| | - Adrian Raine
- Departments of Criminology, Psychiatry,and Psychology,University of Pennsylvania, Philadelphia, PA, USA
| | | | - Erin B Tone
- Department of Psychology, Georgia State University, Atlanta, GA, USA
| | - Julie Suhr
- Department of Psychology, Ohio University, Athens, OH, USA
| | - Julio Bobes
- Department of Psychiatry, University of Oviedo, Oviedo, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Oviedo, Spain
| | - Axit Fumero
- Department of Psychology, University of La Laguna, Santa Cruz de Tenerife, Spain
| | | | | | | | | | - Julien Laloyaux
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway; Psychology and Neuroscience of Cognition Research Unit, University of Liège, Liège, Belgium; NORMENT - Norwegian Center of Excellence for Mental Disorders Research, University of Oslo, Oslo, Norway
| | - Anwar Mechri
- Psychiatry Department, University Hospital of Monastir, Monastir, Tunisia
| | | | - Viviana Wuthrich
- Centre for Emotional Health, Department of Psychology, Macquarie University, Sydney, Australia
| | - Frank Larøi
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway; Psychology and Neuroscience of Cognition Research Unit, University of Liège, Liège, Belgium; NORMENT - Norwegian Center of Excellence for Mental Disorders Research, University of Oslo, Oslo, Norway
| | - Johanna C Badcock
- Centre for Clinical Research in Neuropsychiatry, Division of Psychiatry, Faculty of Health and Medical Sciences, University of Western Australia, Perth, Australia
| | - Assen Jablensky
- Centre for Clinical Research in Neuropsychiatry, School of Psychiatry and Clinical Neurosciences, University of Western Australia, Perth, Australia
| | - David Barron
- Centre for Psychological Medicine, Perdana University, Serdang, Malaysia
| | - Viren Swami
- Centre for Psychological Medicine, Perdana University, Serdang, Malaysia; Department of Psychology, Anglia Ruskin University, Cambridge, UK
| | - Ulrich S Tran
- Department of Basic Psychological Research and Research Methods, School of Psychology, University of Vienna, Vienna, Austria
| | - Martin Voracek
- Department of Basic Psychological Research and Research Methods, School of Psychology, University of Vienna, Vienna, Austria
| |
Collapse
|
9
|
Vora AK, Fisher AM, New AS, Hazlett EA, McNamara M, Yuan Q, Zhou Z, Hodgkinson C, Goldman D, Siever LJ, Roussos P, Perez-Rodriguez MM. Dimensional Traits of Schizotypy Associated With Glycine Receptor GLRA1 Polymorphism: An Exploratory Candidate-Gene Association Study. J Pers Disord 2018; 32:421-432. [PMID: 28758885 PMCID: PMC5856645 DOI: 10.1521/pedi_2017_31_303] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Schizotypy captures the underlying genetic vulnerability to schizophrenia. However, the genetic underpinnings of schizotypy remain unexplored. The authors examined the relationship between single nucleotide poly-morphisms (SNPs) and schizotypy. A sample of 137 subjects (43 healthy controls, 34 subjects with schizotypal personality disorder [SPD], 32 with borderline personality disorder, and 25 with other personality disorders) completed the Schizotypal Personality Questionnaire (SPQ). Subjects were genotyped using a custom array chip. Principal component analysis was used to cluster SPQ variables. Linear regression tested for associations between dimensional schizotypy and SNPs. Logistic regression tested for associations between SNPs and SPD diagnosis. There were significant associations between the minor alleles of three SNPs within the glycine receptor alpha 1 subunit (GLRA1) and the disorganized schizotypy dimension, even after Bonferroni correction. There were no significant associations between any SNPs and the categorical SPD diagnosis. Glycine receptor pathways may have an impact on dimensional traits of psychosis.
Collapse
Affiliation(s)
- Anvi K. Vora
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - Amanda M. Fisher
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - Antonia S. New
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - Erin A. Hazlett
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - Margaret McNamara
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - Qiaoping Yuan
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD, USA
| | - Zhifeng Zhou
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD, USA
| | - Colin Hodgkinson
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD, USA
| | - David Goldman
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD, USA
| | - Larry J. Siever
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - Panos Roussos
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA,Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA,Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - M. Mercedes Perez-Rodriguez
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA,James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| |
Collapse
|
10
|
Liu S, Mellor D, Ling M, Saiz JL, Vinet EV, Xu X, Renati S, Byrne LK. The Schizotypal Personality Questionnaire-Brief lacks measurement invariance across three countries. Psychiatry Res 2017; 258:544-550. [PMID: 28899612 DOI: 10.1016/j.psychres.2017.08.088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 07/06/2017] [Accepted: 08/25/2017] [Indexed: 10/18/2022]
Abstract
The Schizotypal Personality Questionnaire-Brief (SPQ-B) is a commonly-used tool for measuring schizotypal personality traits and due to its wide application, its cross-cultural validity is of interest. Previous studies suggest that the SPQ-B either has a three- or four-factor structure, but the majority of studies have been conducted in Western contexts and little is known about the psychometric properties of the scale in other populations. In this study factorial invariance testing across three cultural contexts-Australia, China and Chile was conducted. In total, 729 young adults (Mean age = 23.99 years, SD = 9.87 years) participated. Invariance testing did not support the four-factor model across three countries. Confirmatory Factor Analyses revealed that neither the four- nor three-factor model had strong fit in any of the settings. However, in comparison with other competing models, the four-factor model showed the best for the Australian sample, while the three-factor model was the most reasonable for both Chinese and Chilean samples. The reliability of the SPQ-B scores, estimated with Omega, ranged from 0.86 to 0.91. These findings suggest that the SPQ-B factors are not consistent across different cultural groups. We suggest that these differences could be attributed to potential confounding cultural and translation issues.
Collapse
Affiliation(s)
- Shujuan Liu
- Deakin University, Geelong, School of Psychology, Australia
| | - David Mellor
- Deakin University, Geelong, School of Psychology, Australia
| | - Mathew Ling
- Deakin University, Geelong, School of Psychology, Australia
| | - José L Saiz
- Departamento de Psicologia, Universidad de La Frontera, Francisco Salazar 1145, Temuco, Chile
| | - Eugenia V Vinet
- Departamento de Psicologia, Universidad de La Frontera, Francisco Salazar 1145, Temuco, Chile
| | - Xiaoyan Xu
- Sichuan Normal University, 5 Jing'an Rd, Jinjiang, Chengdu, People's Republic of China
| | - Solomon Renati
- Karmaveer Bhaurao Patil College, Vashi, Thane, Navi Mumbai, Maharashtra 400703, India
| | - Linda K Byrne
- Deakin University, Geelong, School of Psychology, Australia.
| |
Collapse
|
11
|
Fonseca-Pedrero E, Cohen A, Ortuño-Sierra J, de Álbeniz AP, Muñiz J. Dimensional Structure and Measurement Invariance of the Schizotypal Personality Questionnaire - Brief Revised (SPQ-BR) Scores Across American and Spanish Samples. J Pers Disord 2017; 31:522-541. [PMID: 27749189 DOI: 10.1521/pedi_2016_30_266] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The main goal of the present study was to test the measurement equivalence of the Schizotypal Personality Questionnaire - Brief Revised (SPQ-BR) scores in a large sample of Spanish and American non-clinical young adults. The sample was made up of 5,625 young adults (M = 19.65 years; SD = 2.53; 38.5% males). Study of the internal structure, using confirmatory factor analysis (CFA), revealed that SPQ-BR items were grouped in a theoretical internal structure of nine first-order factors. Moreover, three or four second-order factor and bifactor models showed adequate goodness-of-fit indices. Multigroup CFA showed that the nine lower-order factor models of the SPQ-BR had configural and weak measurement invariance and partial strong measurement invariance across country. The reliability of the SPQ-BR scores, estimated with omega, ranged from 0.67 to 0.91. Using the item response theory framework, the SPQ-BR provides more accurate information at the medium and high end of the latent trait. Statistically significant differences were found in the raw scores of the SPQ-BR subscales and dimensions across samples. The American group scored higher than the Spanish group in all SPQ-BR domains except Ideas of Reference and Suspiciousness. The finding of comparable factor structure in cross-cultural samples would lend further support to the continuum model of psychosis spectrum disorders. In addition, these results provide new information about the factor structure of schizotypal traits and support the validity and utility of this measure in cross-cultural research.
Collapse
Affiliation(s)
- Eduardo Fonseca-Pedrero
- Department of Educational Sciences, University of La Rioja, La Rioja, Spain.,Prevention Program for Psychosis (P3), Oviedo, Spain.,Center for Biomedical Research in the Mental Health Network (CIBERSAM), Oviedo, Spain
| | - Alex Cohen
- Department of Psychology, Louisiana State University, Baton Rouge, Louisiana
| | - Javier Ortuño-Sierra
- Department of Educational Sciences, University of La Rioja, La Rioja, Spain.,Center for Biomedical Research in the Mental Health Network (CIBERSAM), Oviedo, Spain
| | | | - José Muñiz
- Department of Psychology, University of Oviedo, Spain
| |
Collapse
|
12
|
Giakoumaki SG. Emotion processing deficits in the different dimensions of psychometric schizotypy. Scand J Psychol 2017; 57:256-70. [PMID: 27119257 DOI: 10.1111/sjop.12287] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 03/04/2016] [Indexed: 01/07/2023]
Abstract
Schizotypy refers to a personality structure indicating "proneness" to schizophrenia. Around 10% of the general population has increased schizotypal traits, they also share other core features with schizophrenia and are thus at heightened risk for developing schizophrenia and spectrum disorders. A key aspect in schizophrenia-spectrum pathology is the impairment observed in emotion-related processes. This review summarizes findings on impairments related to central aspects of emotional processes, such as emotional disposition, alexithymia, facial affect recognition and speech prosody, in high schizotypal individuals in the general population. Although the studies in the field are not numerous, the current findings indicate that all these aspects of emotional processing are deficient in psychometric schizotypy, in accordance to the schizophrenia-spectrum literature. A disturbed frontotemporal neural network seems to be the critical link between these impairments, schizotypy and schizophrenia. The limitations of the current studies and suggestions for future research are discussed.
Collapse
|
13
|
Zhang LC, Brenner CA. The Factor Structure of the Schizotypal Personality Questionnaire in Undergraduate and Community Samples. J Pers Disord 2017; 31:1-15. [PMID: 26845533 DOI: 10.1521/pedi_2016_30_233] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The prevailing theoretical model of the Schizotypal Personality Questionnaire (SPQ) is a three-factor model based on subscale-level analyses. However, recent item-level factor analyses of the SPQ suggest a four- or five-factor model. To examine the factor structure of the SPQ and how this structure may differ between undergraduate and community samples, the authors conducted exploratory and confirmatory item-level factor analyses of this measure on undergraduate (N = 1,850) and community participants (N = 1,464). A clear three-factor solution was found in the community sample, whereas a somewhat equivocal four-factor solution was found in the undergraduate sample. Both structures displayed gender invariance. This is the first study to address the issues of undergraduate sample generalizability and gender invariance in an item-level exploratory factor analysis of the SPQ. Given the disparate findings in the samples, this study indicates the importance of using both community and undergraduate samples when examining the factor structure of the SPQ.
Collapse
Affiliation(s)
| | - Colleen A Brenner
- Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
| |
Collapse
|
14
|
Karagiannopoulou L, Karamaouna P, Zouraraki C, Roussos P, Bitsios P, Giakoumaki SG. Cognitive profiles of schizotypal dimensions in a community cohort: Common properties of differential manifestations. J Clin Exp Neuropsychol 2016; 38:1050-63. [DOI: 10.1080/13803395.2016.1188890] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
15
|
Fonseca-Pedrero E, Ortuño-Sierra J, Sierro G, Daniel C, Cella M, Preti A, Mohr C, Mason OJ. The measurement invariance of schizotypy in Europe. Eur Psychiatry 2015; 30:837-44. [PMID: 26443051 DOI: 10.1016/j.eurpsy.2015.07.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 07/08/2015] [Accepted: 07/10/2015] [Indexed: 10/23/2022] Open
Abstract
The short version of the Oxford-Liverpool Inventory of Feelings and Experiences (sO-LIFE) is a widely used measure assessing schizotypy. There is limited information, however, on how sO-LIFE scores compare across different countries. The main goal of the present study is to test the measurement invariance of the sO-LIFE scores in a large sample of non-clinical adolescents and young adults from four European countries (UK, Switzerland, Italy, and Spain). The scores were obtained from validated versions of the sO-LIFE in their respective languages. The sample comprised 4190 participants (M=20.87 years; SD=3.71 years). The study of the internal structure, using confirmatory factor analysis, revealed that both three (i.e., positive schizotypy, cognitive disorganisation, and introvertive anhedonia) and four-factor (i.e., positive schizotypy, cognitive disorganisation, introvertive anhedonia, and impulsive nonconformity) models fitted the data moderately well. Multi-group confirmatory factor analysis showed that the three-factor model had partial strong measurement invariance across countries. Eight items were non-invariant across samples. Significant statistical differences in the mean scores of the s-OLIFE were found by country. Reliability scores, estimated with Ordinal alpha ranged from 0.75 to 0.87. Using the Item Response Theory framework, the sO-LIFE provides more accuracy information at the medium and high end of the latent trait. The current results show further evidence in support of the psychometric proprieties of the sO-LIFE, provide new information about the cross-cultural equivalence of schizotypy and support the use of this measure to screen for psychotic-like features and liability to psychosis in general population samples from different European countries.
Collapse
Affiliation(s)
- E Fonseca-Pedrero
- Department of Educational Sciences, University of La Rioja, Spain; Prevention Program for Psychosis (P3), Spain.
| | - J Ortuño-Sierra
- Department of Educational Sciences, University of La Rioja, Spain
| | - G Sierro
- Institute of Psychology, University of Lausanne, Switzerland
| | - C Daniel
- Research Department of Clinical, Educational and Health Psychology, University College London, UK
| | - M Cella
- Department of Psychology, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK
| | - A Preti
- Center of Liaison Psychiatry and Psychosomatics, University Hospital, University of Cagliari, Italy, and Centro Medico Genneruxi, Cagliari, Italy
| | - C Mohr
- Institute of Psychology, University of Lausanne, Switzerland
| | - O J Mason
- Research Department of Clinical, Educational and Health Psychology, University College London, UK
| |
Collapse
|