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Schizotypy

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https://www.readbyqxmd.com/read/29113776/brief-assessment-of-schizotypal-traits-a-multinational-study
#1
Eduardo Fonseca-Pedrero, Javier Ortuño-Sierra, Beatriz Lucas-Molina, Martin Debbané, Raymond C K Chan, David C Cicero, Lisa C Zhang, Colleen Brenner, Emma Barkus, Richard J Linscott, Thomas Kwapil, Neus Barrantes-Vidal, Alex Cohen, Adrian Raine, Michael T Compton, Erin B Tone, Julie Suhr, Julio Bobes, Axit Fumero, Stella Giakoumaki, Ioannis Tsaousis, Antonio Preti, Michael Chmielewski, Julien Laloyaux, Anwar Mechri, Mohamed Aymen Lahmar, Viviana Wuthrich, Frank Larøi, Johanna C Badcock, Assen Jablensky, David Barron, Viren Swami, Ulrich S Tran, Martin Voracek
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...
November 4, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/29096131/winter-birth-urbanicity-and-immigrant-status-predict-psychometric-schizotypy-dimensions-in-adolescents
#2
D Mimarakis, T Roumeliotaki, P Roussos, S G Giakoumaki, P Bitsios
BACKGROUND: Urbanicity, immigration and winter-birth are stable epidemiological risk factors for schizophrenia, but their relationship to schizotypy is unknown. This is a first examination of the association of these epidemiological risk factors with positive schizotypy, in nonclinical adolescents, controlling for a range of potential and known confounders. METHODS: We collected socio-demographics, life-style, family and school circumstances, positive schizotypy dimensions and other personality traits from 445 high school pupils (192 males, 158 immigrants) from 9 municipalities in Athens and Heraklion, Greece, which covered a range of host population and migrant densities...
September 18, 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/29036523/stress-dependent-association-between-polygenic-risk-for-schizophrenia-and-schizotypal-traits-in-young-army-recruits
#3
Alex Hatzimanolis, Dimitrios Avramopoulos, Dan E Arking, Anna Moes, Pallav Bhatnagar, Todd Lencz, Anil K Malhotra, Stella G Giakoumaki, Panos Roussos, Nikolaos Smyrnis, Panos Bitsios, Nicholas C Stefanis
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)...
June 13, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29036385/the-latent-taxonicity-of-schizotypy-in-biological-siblings-of-probands-with-schizophrenia
#4
Richard J Linscott, Sarah E Morton
If schizotypy is a taxonic liability for schizophrenia with a general population prevalence of ~10%, it should also be taxonic among biological siblings of probands with schizophrenia. Moreover, assuming this is so, siblings' schizotypy class membership should be predicted by probands' familial load for psychotic disorder and clinical severity, consistent with a multifactorial polygenic threshold model of schizophrenia. We tested these hypotheses in the Genetic Risk and Outcome of Psychosis (GROUP) Study where siblings of probands (n = 792) and unaffected controls (n = 559) provided self-report ratings on the Community Assessment of Psychic Experiences (CAPE)...
October 4, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29028526/semantic-coherence-in-psychometric-schizotypy-an-investigation-using-latent-semantic-analysis
#5
Matthew P Marggraf, Alex S Cohen, Beshaun J Davis, Paula DeCrescenzo, Natasha Bair, Kyle S Minor
Technological advancements have led to the development of automated methods for assessing semantic coherence in psychiatric populations. Latent Semantic Analysis (LSA) is an automated method that has been used to quantify semantic coherence in schizophrenia-spectrum disorders. The current study examined whether: 1) Semantic coherence reductions extended to psychometrically-defined schizotypy and 2) Greater cognitive load further reduces semantic coherence. LSA was applied to responses generated during category fluency tasks in baseline and cognitive load conditions...
September 30, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29024855/the-relationship-between-schizotypal-facets-and-conspiracist-beliefs-via-cognitive-processes
#6
David Barron, Adrian Furnham, Laura Weis, Kevin D Morgan, Tony Towell, Viren Swami
This study sought to replicate previous work showing relationships between components of schizotypy and conspiracist beliefs, and extend it by examining the mediating role of cognitive processes. An international online sample of 411 women and men (mean age = 35.41 years) completed measures of the schizotypal facets of Odd Beliefs or Magical Thinking and Ideas of Reference, conspiracist beliefs, and cognitive processes related to need for cognition, analytic thinking, and cognitive insight. Path analysis confirmed the associations between both schizotypal facets and conspiracist beliefs in the present sample...
October 2, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29024192/association-of-schizotypy-with-striatocortical-functional-connectivity-and-its-asymmetry-in-healthy-adults
#7
Yi Wang, Ulrich Ettinger, Thomas Meindl, Raymond C K Chan
Altered striatocortical functional connectivity has been suggested to be a trait marker of schizophrenia spectrum disorders, including schizotypal personality. In the present study, we examined the association between schizotypal personality traits and striatocortical functional connectivity in a sample of healthy adults. The German version of the Schizotypal Personality Questionnaire was obtained from N = 111 participants recruited from the general public. Resting-state functional magnetic resonance imaging scans were acquired at 3T...
October 11, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28958455/schizotypal-traits-and-cognitive-performance-in-siblings-of-patients-with-psychosis
#8
L Moreno-Samaniego, Ana M Gaviria, E Vilella, J Valero, A Labad
INTRODUCTION: Schizotypy has been proposed to be the expression of genetic vulnerability to schizophrenia. The available literature shows cognitive similarities between schizotypy and schizophrenia, with mildly impaired performance being associated with schizotypy. This study aims to determine the relationship between schizotypy and cognitive performance in siblings of patients with psychosis. METHODS: Schizotypal features and cognitive performance on a neuropsychological battery were compared between 48 siblings of patients with psychosis and 44 healthy controls...
December 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28957793/cannabis-use-in-early-adolescence-is-associated-with-higher-negative-schizotypy-in-females
#9
L Albertella, M E Le Pelley, J Copeland
The current study examined the relationship between early onset cannabis use (before age 16) and different schizotypy dimensions, and whether gender moderates these associations. Participants were 162 cannabis users, aged 15-24 years, who completed an online assessment examining alcohol and other drug use, psychological distress, and schizotypy. Participants were divided according to whether or not they had started using cannabis before the age of 16 (early onset=47; later onset=115) and gender (males=66; females=96)...
September 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28955212/classifying-schizotypy-using-an-audiovisual-emotion-perception-test-and-scalp-electroencephalography
#10
Ji Woon Jeong, Tariku W Wendimagegn, Eunhee Chang, Yeseul Chun, Joon Hyuk Park, Hyoung Joong Kim, Hyun Taek Kim
Schizotypy refers to the personality trait of experiencing "psychotic" symptoms and can be regarded as a predisposition of schizophrenia-spectrum psychopathology (Raine, 1991). Cumulative evidence has revealed that individuals with schizotypy, as well as schizophrenia patients, have emotional processing deficits. In the present study, we investigated multimodal emotion perception in schizotypy and implemented the machine learning technique to find out whether a schizotypy group (ST) is distinguishable from a control group (NC), using electroencephalogram (EEG) signals...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28931092/the-genome-wide-associated-candidate-gene-znf804a-and-psychosis-proneness-evidence-of-sex-modulated-association
#11
Marta de Castro-Catala, Aurea Mora-Solano, Thomas R Kwapil, Paula Cristóbal-Narváez, Tamara Sheinbaum, Anna Racioppi, Neus Barrantes-Vidal, Araceli Rosa
BACKGROUND: The Zinc finger protein 804A (ZNF804A) is a promising candidate gene for schizophrenia and the broader psychosis phenotype that emerged from genome-wide association studies. It is related to neurodevelopment and associated to severe symptoms of schizophrenia and alterations in brain structure, as well as positive schizotypal personality traits in non-clinical samples. Moreover, a female-specific association has been observed between ZNF804A and schizophrenia. AIM: The present study examined the association of two ZNF804A polymorphisms (rs1344706 and rs7597593) with the positive dimension of schizotypy and psychotic-like experiences in a sample of 808 non-clinical subjects...
2017: PloS One
https://www.readbyqxmd.com/read/28923963/mistiming-of-thought-and-perception-predicts-delusionality
#12
Adam Bear, Rebecca G Fortgang, Michael V Bronstein, Tyrone D Cannon
The timing of thoughts and perceptions plays an essential role in belief formation. Just as people can experience in-the-moment perceptual illusions, however, they can also be deceived about how events unfold in time. Here, we consider how a particular type of temporal distortion, in which the apparent future influences "earlier" events in conscious awareness, might affect people's most fundamental beliefs about themselves and the world. Making use of a task that has been shown to elicit such reversals in the temporal experience of prediction and observation, we find that people who are more prone to think that they predicted an event that they actually already observed are also more likely to report holding delusion-like beliefs...
October 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28913387/personality-traits-and-theory-of-mind-performance-data-of-a-spanish-sample-of-university-students
#13
José M Gavilán, Juan Haro
This article allows consulting the performance data of 96 Spanish university students in two personality questionnaires and two theory of mind (ToM) tasks. Personality dimensions were evaluated through the OPERAS questionnaire (Vigil-Colet et al., 2013) [1], which evaluates global personality through 5 scales: extraversion, agreeableness, conscientiousness, emotional stability, openness to experience, and the ESQUIZO-Q questionnaire (Fonseca-Pedrero et al., 2010) [2], which assesses schizotypy by means of 10 subscales: ideas of reference, magical thinking, unusual perceptual experiences, odd thinking and language, paranoid ideation, physical anhedonia, social anhedonia, odd behavior, lack of close friends, and excessive social anxiety...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28889074/interaction-between-fkbp5-gene-and-childhood-trauma-on-psychosis-depression-and-anxiety-symptoms-in-a-non-clinical-sample
#14
Marta de Castro-Catala, Elionora Peña, Thomas R Kwapil, Sergi Papiol, Tamara Sheinbaum, Paula Cristóbal-Narváez, Sergi Ballespí, Neus Barrantes-Vidal, Araceli Rosa
BACKGROUND: Childhood trauma has been associated with a heightened risk for presenting clinical and non-clinical psychopathology in adulthood. Genes related with the stress response, such as the FK506 binding protein 51 (FKBP5), are plausible candidates moderating the effects of childhood trauma on the emergence of such symptoms later on. The present study aimed to explore the moderating role of FKBP5 genetic variability on the association of different types of childhood trauma with subclinical psychosis, depression and anxiety in a non-clinical sample...
August 26, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28878159/connecting-the-dots-between-schizotypal-symptoms-and-social-anxiety-in-youth-with-an-extra-x-chromosome-a-mediating-role-for-catastrophizing
#15
Anne C Miers, Tim Ziermans, Sophie van Rijn
Youth with an extra X chromosome (47, XXY & 47, XXX) display higher levels of schizotypal symptoms and social anxiety as compared to typically developing youth. It is likely that the extra X chromosome group is at-risk for clinical levels of schizotypy and social anxiety. Hence, this study investigated how schizotypal and social anxiety symptoms are related and mechanisms that may explain their association in a group of 38 children and adolescents with an extra X chromosome and a comparison group of 109 typically developing peers (8-19 years)...
September 6, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28867517/schizophrenia-and-creativity-a-meta-analytic-review
#16
Selcuk Acar, Xiao Chen, Nur Cayirdag
The present study investigated the relationship between creativity and schizophrenia with a 3-level multilevel meta-analytic approach. Analyses with 200 effect sizes obtained from 42 studies found a mean effect size of r=-0.324, 95%CI [-0.42, -0.23]. Further analyses focused on moderators and indicated that the relationship between schizophrenia and creativity is moderated by type of creativity measure, the content of creativity measure, the severity of schizophrenia, and patient status. The negative mean effect size was stronger with semantic-category or verbal-letter fluency tasks than the divergent thinking or associational measures...
August 31, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28853332/cognitive-functioning-in-schizotypy-through-the-lens-of-the-accessibility-model
#17
Kyle R Mitchell, Alex S Cohen
INTRODUCTION: Individuals with schizotypy self-report subjective cognitive complaints commensurate with deficits reported by individuals with schizophrenia. In contrast to schizophrenia, objective deficits in memory are modest in individuals with schizotypy, as compared to their self-reported cognitive complaints. It has been proposed that abnormalities in semantic memory systems may underlie this dysjunction. METHODS: This study employed a modified verbal memory paradigm in a sample of 87 individuals with psychometrically defined schizotypy...
August 30, 2017: Cognitive Neuropsychiatry
https://www.readbyqxmd.com/read/28843155/do-complaints-of-everyday-cognitive-failures-in-high-schizotypy-relate-to-emotional-working-memory-deficits-in-the-lab
#18
Nicole Carrigan, Emma Barkus, Adriel Ong, Maryann Wei
BACKGROUND: Individuals high on schizotypy complain of increased cognitive failures in everyday life. However, the neuropsychological performance of this group does not consistently indicate underlying ability deficits. It is possible that current neuropsychological tests lack ecological validity. Given the increased affective reactivity of high schizotypes, they may be more sensitive to emotional content interfering with cognitive ability. This study sought to explore whether an affective n-back working memory task would elicit impaired performance in schizotypy, echoing complaints concerning real world cognition...
October 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28832672/white-noise-speech-illusion-and-psychosis-expression-an-experimental-investigation-of-psychosis-liability
#19
Lotta-Katrin Pries, Sinan Guloksuz, Claudia Menne-Lothmann, Jeroen Decoster, Ruud van Winkel, Dina Collip, Philippe Delespaul, Marc De Hert, Catherine Derom, Evert Thiery, Nele Jacobs, Marieke Wichers, Claudia J P Simons, Bart P F Rutten, Jim van Os
BACKGROUND: An association between white noise speech illusion and psychotic symptoms has been reported in patients and their relatives. This supports the theory that bottom-up and top-down perceptual processes are involved in the mechanisms underlying perceptual abnormalities. However, findings in nonclinical populations have been conflicting. OBJECTIVES: The aim of this study was to examine the association between white noise speech illusion and subclinical expression of psychotic symptoms in a nonclinical sample...
2017: PloS One
https://www.readbyqxmd.com/read/28761988/neurological-soft-signs-precede-the-onset-of-schizophrenia-a-study-of-individuals-with-schizotypy-ultra-high-risk-individuals-and-first-onset-schizophrenia
#20
Raymond C K Chan, Hui-Ru Cui, Min-Yi Chu, Tian-Hong Zhang, Ya Wang, Yi Wang, Zhi Li, Simon S Y Lui, Ji-Jun Wang, Eric F C Cheung
Neurological soft signs (NSS) are one of the biomarkers for schizophrenia spectrum disorders. However, a few studies have examined the prevalence of NSS across the schizophrenia spectrum. The present study adopted a quasi-longitudinal study design and examined the prevalence of NSS and their associations with clinical and behavioural manifestations in participants in different stages of the illness. The abridged version of the Cambridge Neurological Inventory was administered to 39 patients with the first-episode schizophrenia, 39 individuals with ultra-high risk (UHR) for psychosis, 39 individuals with schizotypy, and 39 healthy controls...
July 31, 2017: European Archives of Psychiatry and Clinical Neuroscience
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