The dimensional structure of the Wisconsin schizotypy scales: Factor identification and construct validity

Kwapil, Thomas R.; Silvia, Paul J.; Barrantes‐Vidal, Neus

doi:10.1016/j.eurpsy.2008.01.746

Cited by 58 publications

(135 citation statements)

References 59 publications

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“…They do not map directly onto DSM-IV-TR symptoms of SPD, but rather follow a characterization of schizotypy proposed by Paul Meehl (1964). Recent factor analyses of these scales showed a two-factor model that emphasizes both positive schizotypy and negative schizotypy (Kwapil et al 2008). …”

Section: Measurement Of Cluster a Personality Disordersmentioning

confidence: 99%

Cluster A Personality Disorders: Schizotypal, Schizoid and Paranoid Personality Disorders in Childhood and Adolescence

Esterberg

Goulding

Walker

2010

J Psychopathol Behav Assess

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Cluster A personality disorders (PD), including schizotypal personality disorder (SPD), paranoid personality disorder (PPD), and schizoid PD, are marked by odd and eccentric behaviors, and are grouped together because of common patterns in symptomatology as well as shared genetic and environmental risk factors. The DSM-IV-TR describes personality disorders as representing stable and enduring patterns of maladaptive traits, and much of what is understood about Cluster A personality disorders in particular stems from research with adult populations. Less in known about these disorders in children and adolescents, and controversy remains regarding diagnosis of personality disorders in general in youth. The current paper reviews the available research on Cluster A personality disorders in childhood and adolescence; specifically, we discuss differentiating between the three disorders and distinguishing them from other syndromes, measuring Cluster A disorders in youth, and the nature and course of these disorders throughout childhood and adolescence. We also present recent longitudinal data from a sample of adolescents diagnosed with Cluster A personality disorders from our research laboratory, and suggest directions for future research in this important but understudied area.

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Section: Measurement Of Cluster a Personality Disordersmentioning

confidence: 99%

Cluster A Personality Disorders: Schizotypal, Schizoid and Paranoid Personality Disorders in Childhood and Adolescence

Esterberg

Goulding

Walker

2010

J Psychopathol Behav Assess

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“…Studies exploring the dimensional structure of the psychosis proneness scales reported a 2-factor model with positive and negative schizotypy dimensions (e.g., Kelley & Coursey, 1992 ;Kwapil, Barrantes-Vidal, & Silvia, 2008 ). The positive dimension is characterized mainly by magical ideation and perceptual aberration, while the negative dimension is characterized by physical and social anhedonia.…”

mentioning

confidence: 99%

Criterion Validity of the Cognitive Slippage and Schizotypal Ambivalence Scales

Loas¹,

Dimassi²,

Monestès³

et al. 2013

Psychol Rep

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This study explored the criterion-validity of the Cognitive Slippage Scale (CSS) and the Schizotypal Ambivalence Scale (SAS). 27 first-degree relatives of individuals with schizophrenia (9 males, 18 females; M age=45.3 yr., SD=13) were compared with 30 first-degree relatives of non-psychotic patients (15 males, 15 females; M age = 44.6 yr., SD = 11.6) on the French versions of the CSS and SAS. The former group, who is at high risk for schizophrenia, had significantly higher scores than the latter group on both scales.

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“…For the analyses in this paper, we combined scores of 1 and 2 into one score, 1 (present). The diagnosticians also assigned scores on each of the six dimensions included in the Chapman Psychosis Rating Scale (CPRS): transmission of ones’ own thoughts, passivity experiences, voice and auditory hallucinations, thought withdrawal, aberrant beliefs, and visual experiences (Chapman and Chapman, 1980; Kwapil et al, 1999; Kwapil et al, 2008). …”

Section: Methodsmentioning

confidence: 99%

Tailoring the definition of the clinical schizophrenia phenotype in linkage studies

Krause

Krastoshevsky

Coleman

et al. 2010

Schizophrenia Research

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The delineation of schizophrenia-related symptomatology is critical to informative clinical phenotyping in linkage studies. A minority of first-degree relatives of schizophrenia and schizoaffective probands (RelSZSA) qualifies for a clinical diagnosis in the schizophrenia spectrum. Schizotypal personality disorder (SPD) is a key component of this spectrum, largely because of its relatively specific familial aggregation in relatives. The criteria for SPD were not developed for the purpose of identifying RelSZSA, however, and SPD is not a homogeneous clinical disorder, potentially introducing false positives and false negatives into affectedness classifications. In this study we used logistic regression (LR) to identify the combination of clinical signs and symptoms that maximized the discrimination between nonpsychotic first-degree RelSZSA (n=241) and controls (n=161). Three variables contributed significantly to optimizing this distinction: no close friends or confidants other than family members, social isolation and irritability. The combination of deviant LR scores and schizophrenia spectrum psychotic disorders had greater sensitivity for identifying RelSZSA, 23.7%, than SPD and schizophrenia spectrum psychotic disorders, 16%. Importantly, the diagnosis of SPD and deviant LR scores were not significantly correlated. Most individuals with deviant LR scores did not meet criteria for a diagnosis of SPD and only a minority of those who were diagnosed with SPD had deviant LR scores. Since misclassification of gene carriers as non-gene carriers in linkage analyses increases the risk of false negatives, it may be advantageous to tailor the definition of the clinical phenotype to those aspects of social-interpersonal dysfunction that optimize the discrimination of RelSZSA from controls.

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The dimensional structure of the Wisconsin schizotypy scales: Factor identification and construct validity

Cited by 58 publications

References 59 publications

Cluster A Personality Disorders: Schizotypal, Schizoid and Paranoid Personality Disorders in Childhood and Adolescence

Cluster A Personality Disorders: Schizotypal, Schizoid and Paranoid Personality Disorders in Childhood and Adolescence

Criterion Validity of the Cognitive Slippage and Schizotypal Ambivalence Scales

Tailoring the definition of the clinical schizophrenia phenotype in linkage studies

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