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Emma Barkus
University of Wollongong
68Publications
19H-index
1,352Citations
Publications 68
Newest
#1Thanh P. Le (LSU: Louisiana State University)H-Index: 2
#2Taylor L. Fedechko (LSU: Louisiana State University)H-Index: 1
Last.Emma Barkus (UOW: University of Wollongong)H-Index: 19
view all 7 authors...
Abstract The dysfunctional cognitive and reasoning biases which underpin psychotic symptoms are likely to present prior to the onset of a diagnosable disorder and should therefore be detectable along the psychosis continuum in individuals with schizotypal traits. Two reasoning biases, Bias Against Disconfirmatory Evidence (BADE) and Jumping to Conclusions (JTC), describe how information is selected and weighed under conditions of uncertainty during decision making. It is likely that states such ...
Humans are highly social beings, yet people with social anhedonia experience reduced interest in or reward from social situations. Social anhedonia is a key facet of schizotypal personality, an important symptom of schizophrenia, and increasingly recognized as an important feature in a range of other psychological disorders. However, to date, there has been little examination of the similarities and difference in social anhedonia across diagnostic borders. Here, our goal was to conduct a selecti...
#1Emma Barkus (UOW: University of Wollongong)H-Index: 19
#2Erin Mison (UOW: University of Wollongong)H-Index: 1
Last.Mahime Watanabe (UOW: University of Wollongong)
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#1Eduardo Fonseca-Pedrero (UR: University of La Rioja)H-Index: 20
#2Javier Ortuño (UR: University of La Rioja)H-Index: 2
Last.Thomas Richard Kwapil (UNCG: University of North Carolina at Greensboro)H-Index: 40
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Elucidating schizotypal traits is important if we are to understand the various manifestations of psychosis spectrum liability and to reliably identify individuals at high risk for psychosis. The present study examined the network structures of (1) 9 schizotypal personality domains and (2) 74 individual schizotypal items, and (3) explored whether networks differed across gender and culture (North America vs China). The study was conducted in a sample of 27001 participants from 12 countries and 2...
#1Eduardo Fonseca-Pedrero (UR: University of La Rioja)H-Index: 20
#2Raymond C.K. Chan (CAS: Chinese Academy of Sciences)H-Index: 49
Last.Thomas Richard Kwapil (UNCG: University of North Carolina at Greensboro)H-Index: 40
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Abstract Background Schizotypal traits are expressions of underlying vulnerability to psychotic disorders which have a potential impact on mental health status, neurocognition, quality of life, and daily functioning. To date, little research has examined epidemiologic landscape of schizotypal traits at the cross-national level. Our aim was to study the expression of schizotypal traits by sex, age, and country in a combined sample gathered from 12 countries. Methods A total of 27,001 participants...
#1Eduardo Fonseca-Pedrero (UR: University of La Rioja)H-Index: 20
#2Martin Debbané (UCL: University College London)H-Index: 27
Last.Thomas Richard Kwapil (UNCG: University of North Carolina at Greensboro)H-Index: 40
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BACKGROUND: Schizotypal traits are considered a phenotypic-indicator of schizotypy, a latent personality organization reflecting a putative liability for psychosis. To date, no previous study has examined the comparability of factorial structures across samples originating from different countries and cultures. The main goal was to evaluate the factorial structure and reliability of the Schizotypal Personality Questionnaire (SPQ) scores by amalgamating data from studies conducted in 12 countries...
#1Emma E. Walter (UOW: University of Wollongong)H-Index: 5
#2Francesca Fernandez (Illawarra Health & Medical Research Institute)H-Index: 12
Last.Emma Barkus (UOW: University of Wollongong)H-Index: 19
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Abstract Cortisol is involved in preparing the body’s response for stress. However, in those at risk for mental health problems, abnormal cortisol release following stress has been reported. In particular, we are yet to fully understand how stress leads to an exacerbation of symptoms and progression of risk in those who express psychosis proneness or schizotypy. Using the Trier Social Stress Test, we examined the effect of experimentally induced psychosocial stress on cortisol release in otherwi...
#1Eduardo Fonseca-Pedrero (UR: University of La Rioja)H-Index: 20
#2Javier Ortuño-Sierra (UR: University of La Rioja)H-Index: 11
Last.Richard J. Linscott (University of Otago)H-Index: 14
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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 mea...
#1Catherine Quinn (QUT: Queensland University of Technology)H-Index: 6
#2Hollie Wilson (QUT: Queensland University of Technology)H-Index: 3
Last.Leanne Hides (QUT: Queensland University of Technology)H-Index: 26
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Objective To develop and validate a short form of the Cannabis Experiences Questionnaire - Intoxication Effects (CEQ-I), a 42-item scale which measures the euphoric and paranoid-dysphoric effects of cannabis intoxication. Method Exploratory and confirmatory factor analyses were conducted among 604 past-month cannabis users to develop the short form. The factor structure was replicated in a second sample of 146 past-month cannabis users. The concurrent validity of the scale was also examined. Res...
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