Spelling suggestions: "subject:"schizotypy personality""
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Associations Between Neuromotor and Neurocognitive Functioning in Adults with Schizotypal Personality DisorderReynolds, Felicia D. 05 1900 (has links)
Individuals diagnosed with schizotypal personality disorder (SPD) exhibit patterns of cognitive deficits in (1) attention (Lees-Roitman, Cornblatt, Bergman, Obuchowski, Mitropoulou, Keefe, Silverman, & Siever, 1997), (2) memory (Bergman, Harvey, Lees-Roitman, Mohs, Margerm, Silverman, & Siever, 1998), (3) executive functioning (Cadenhead, Perry, Shafer, & Braff, 1999), and recently (4) neuromotor functioning (Neumann & Walker, 1999), similar to individuals with a diagnosis of schizophrenia. Furthermore, recent research suggests a link between neuromotor and cognitive functioning in schizophrenia spectrum disorders (SSDs) (Neumann & Walker, 2003). The current study is an extension of research on non-drug-induced neuromotor disturbances in individuals with SPD and examines how such disturbances covary with neurocognitive measures. Approximately thirty-three adults (18-65) were rated for SPD symptoms. Motor assessments included a computerized motor task and finger tapping test. Cognitive assessments included measures of attention, verbal and visual memory, and executive functioning. Consistent with previous research, the SPD group displayed significant right hand (left hemisphere) motor disturbances (i.e., increased force and force variability) compared to healthy controls after excluding all cases reporting a history of head injury. In addition, results indicate significant associations between motor, cognitive, and symptom variables. Consistent with previous research, neuromotor functioning and the relationships between motor and cognitive functioning varied as a function of Time of Day (TOD) of testing. Understanding the relationship between neuromotor and neurocognitive functioning may help elucidate the neural systems that contribute the symptoms characteristic of SSDs.
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The relationship of dissociation to borderline and schizotypal personality syndromesStockdale, Gary D. January 2001 (has links)
Borderline and schizotypal personality constructs were compared as predictors of dissociation for 971 nonclinical university undergraduates who completed 11 self-report behavior inventories. Structural equation modeling and multiple regression were used to (a) test the hypothesis that the quantitative interaction of borderline and schizotypal constructs would be the strongest predictor of dissociation and (b) evaluate each construct alone as well as their additive effect for prediction of dissociation. The interaction hypothesis was rejected; the quantitative interaction was only a substantively trifling and statistically nonsignificant predictor of dissociation. In a commonality analysis, the additive borderline and schizotypal effect was equivalent to schizotypy alone and marginally larger than the borderline effect alone for the prediction of dissociation. However, all three effects separately were substantial predictors; thus, dissociation is an untenable discriminator for the borderline and schizotypal constructs. Finally, when schizotypy was compared directly to the borderline construct such that the common variance was distributed dependent upon comparative predictive power (i.e., beta weights), schizotypy was greatly superior to the borderline construct for dissociative predictability. Consequently, reconsideration of the existing paradigm that dissociation is more strongly associated with the borderline construct than with schizotypy is warranted. / Department of Psychological Science
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The relationship of social anhedonia and social anxiety with schizotypy and their expression in daily lifeBrown, Leslie H. January 1900 (has links) (PDF)
Thesis (M.A.)--University of North Carolina at Greensboro, 2006. / Title from PDF title page screen. Advisor: Thomas R. Kwapil; submitted to the Dept. of Psychology. Includes bibliographical references (p. 38-46).
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A study of the relationship between psychotic and spiritual experienceJackson, M. C. January 1991 (has links)
No description available.
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Demographic and Psychosocial Contributions to the Expression of Schizotypal Personality Traits.Hernandez, Nikki 12 1900 (has links)
Previous research suggests there are a number of variables that are associated with the expression of schizotypal personality disorder (SPD) symptoms. Such variables include childhood trauma, depression and anxiety, substance use, normal-range personality traits, ethnicity, and gender. However, research to date has not examined all of these variables in a single study to determine how they may be interrelated or differentially related to SPD symptom domains. Of particular interest is the association of these variables as explained by the diathesis-stress model. This study utilized a convenience sample of 298 undergraduate students to examine a continuous range of scores for symptoms of SPD and how the interrelation of biological factors such as gender and ethnicity and psychosocial factors and stressors such as childhood trauma and personality traits, specifically neuroticism and extroversion, influence the expression of SPD symptoms. It was predicted that anxiety, depression, stress, and childhood trauma would positively correlate to SPD symptoms. It was also hypothesized that neuroticism and substance use would positively correlate to schizotypal traits and extroversion would be negatively correlated to schizotypal traits as measured by the Schizotypal Personality Questionnaire-Brief. It was further hypothesized that psychosocial stressors would be moderated by the aforementioned biological factors.
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The Relative Sensitivity Of An Olfactory Identification Deficit In Individuals With Schizotypal Personality FeaturesKamath, Vidyulata 01 January 2007 (has links)
Olfactory identification deficits have received recent attention as a potentially useful endophenotype for schizophrenia. Examination of this deficit in individuals with schizotypal personality features (SPF) offers an alternative approach to multiple confounds present when examining individuals with schizophrenia. The aim of the current study was to compare the relative sensitivity of performance on measures of olfaction identification and sustained attention to the presence of SPF. Twenty-six undergraduates were defined as having SPF based on scoring in the top 10% of the Abbreviated Schizotypal Personality Questionnaire (SPQ-B; mean age 19.6, SD = 1.1; 62% female). These individuals were compared to twenty-six controls (scoring lower than half a standard deviation above the mean; mean age 19.8, SD = 1.6; 62% female). All participants were administered the Schizotypal Personality Disorder (SPD) section of the Structured Clinical Interview for DSM IV Axis II Personality Disorders (SCID-II). In addition, participants were administered the Brief Smell Identification Test (B-SIT) and a six-minute degraded-stimuli Continuous Performance Test (CPT). Group differences in performance indices of the CPT did not approach statistical significance. Similarly, there were no statistically significant group differences for males or females in performance on the B-SIT. Correlational analyses examined cognitive performance with a dimension score derived by summing quantitative ratings from the SPD items on the SCID-II. The SPD dimension score showed a statistically significant positive correlation with several performance indices of the CPT, including omission errors (rs(52) = .51, p ≤ .001) and commission errors (rs(52) = .38, p ≤ .005). In contrast, the B-SIT scores were not correlated with the SPD dimension score for males or females. Contrary to our hypothesis, results from the current study suggest that olfactory identification deficits may not represent a robust endophenotype consistently found in samples with schizotypal personality features. With regard to sustained attention, our differential findings suggest that schizotypal traits may be more adequately assessed through an interview by trained clinicians who use clinical judgment to determine the presence of phenotypic aspects of SPD (e.g., SCID-II), rather than relying on self-report measures (e.g., SPQ-B). Implications as well as limitations and future directions of these findings are discussed.
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Dissociating Response Prepotency and Response Conflict within Tasks of Action Inhibition among Individuals Scoring High on the Schizotypal Personality QuestionnaireWilson, Carolyn M. January 2010 (has links)
Theories embedded within evolutionary neurobiology offer useful frameworks within which to understand cognitive impairment in schizophrenia (SCZ). The current research invokes the Dual Trends Theory (DTT), an evolutionary model that posits that neural architecture develops along two separate pathways: the dorsal ‘archicortical’ trend and the ventral ‘paleocortical’ trend. Although various lines of research converge to suggest that SCZ is associated with dorsal trend impairment in the context of relative ventral trend sparing, one persistent inconsistency exists. Specifically, individuals with SCZ routinely show impairment on tasks of action inhibition (AI; the ability to inhibit a pre-planned movement), a function routinely shown to be mediated by the inferior frontal gyrus, a key structure of the ventral trend. Here we argue that conventional tasks of AI conflate AI per se with response conflict (CON) demands, a function shown to be mediated by the anterior cingulate cortex, a key structure of the dorsal trend. We define CON as any aspect of a task that increases the difficulty of deciphering or interpreting the meaning of task stimuli (e.g., greater perceptual similarity between imperative task stimuli). The current research administered novel AI tasks in order to independently examine increases in CON and increases in the prepotency to respond to a pre-planned movement (PREP; considered a more fundamental measure of AI). Consistent with study hypotheses, individuals with Schizoprenia-spectrum disorders (specifically schizotypy) failed to show compensatory response time (RT) slowing when confronted with increasing CON demands yet showed proportional RTs, relative to healthy control participants, as PREP demands increased. These findings were interpreted as reflecting impairment in their ability to detect and/or decipher CON. More broadly, these findings suggest that cognitive abnormalities in SCZ may represent disproportionately impaired dorsal trend circuitry.
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Dissociating Response Prepotency and Response Conflict within Tasks of Action Inhibition among Individuals Scoring High on the Schizotypal Personality QuestionnaireWilson, Carolyn M. January 2010 (has links)
Theories embedded within evolutionary neurobiology offer useful frameworks within which to understand cognitive impairment in schizophrenia (SCZ). The current research invokes the Dual Trends Theory (DTT), an evolutionary model that posits that neural architecture develops along two separate pathways: the dorsal ‘archicortical’ trend and the ventral ‘paleocortical’ trend. Although various lines of research converge to suggest that SCZ is associated with dorsal trend impairment in the context of relative ventral trend sparing, one persistent inconsistency exists. Specifically, individuals with SCZ routinely show impairment on tasks of action inhibition (AI; the ability to inhibit a pre-planned movement), a function routinely shown to be mediated by the inferior frontal gyrus, a key structure of the ventral trend. Here we argue that conventional tasks of AI conflate AI per se with response conflict (CON) demands, a function shown to be mediated by the anterior cingulate cortex, a key structure of the dorsal trend. We define CON as any aspect of a task that increases the difficulty of deciphering or interpreting the meaning of task stimuli (e.g., greater perceptual similarity between imperative task stimuli). The current research administered novel AI tasks in order to independently examine increases in CON and increases in the prepotency to respond to a pre-planned movement (PREP; considered a more fundamental measure of AI). Consistent with study hypotheses, individuals with Schizoprenia-spectrum disorders (specifically schizotypy) failed to show compensatory response time (RT) slowing when confronted with increasing CON demands yet showed proportional RTs, relative to healthy control participants, as PREP demands increased. These findings were interpreted as reflecting impairment in their ability to detect and/or decipher CON. More broadly, these findings suggest that cognitive abnormalities in SCZ may represent disproportionately impaired dorsal trend circuitry.
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Cultural factors influencing content of delusions among schizophrenic patients in Saudi ArabiaAl Nzawi, Fatma Mohammed January 2012 (has links)
The present study aimed to investigate the influences of socio-cultural context on content of delusions within schizophrenic patients among three different geographical areas in Saudi Arabia and to estimate the prevalence of schizotypal personality within the non-clinical Saudi population. Methods: 148 patients meeting DSM-IV criteria of schizophrenia were drawn from in-patient sections of mental health hospitals in three areas of study (Riyadh, Jeddah, and the Eastern Province), and 364 participants were recruited for comparison groups from Saudi universities and general medical practices in the same areas. The study utilized the following instruments: Scale for the Assessment of Positive Symptoms (SAPS), Scale for the Assessment of Negative Symptoms (SANS), the MacArthur-Maudsley Delusions Assessment Schedule (MMDAS), the World Health Organization (WHO) Life Events Schedule, the Aetiological Beliefs Questionnaire (ABQ), and the Schizotypal-Personality Questionnaire (SPQ). Results: Firstly: there were significant main effects of residence and sex on the three dependent SPQ scales, and females and Riyadh area residents scored higher on all dependent SPQ scales especially on the cognitive scale. Secondly: persecutory delusions were the most common delusions among schizophrenic patients followed by delusions of being controlled, and the frequency of persecutory delusions was significantly higher in females and in the Riyadh area. Thirdly: only delusions of jealousy were specifically associated with violent behaviours among schizophrenic patients. Finally: ABQ showed that both supernatural and psychological explanations of illness were common among both control and clinical groups. Qualitative analysis of the content of delusions revealed socio-cultural and gender-related issues that were strongly reflected in the themes and content of delusions. Conclusion: Content analysis of delusions in a Saudi schizophrenic sample showed strong effects of the socio-cultural context and stress points such as racism and gender inequality, and gender and regional culture affected both the frequency with which persecutory delusions were observed, and the mean scores of schizotypal personality in a non-clinical sample.
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A FIVE-FACTOR MEASURE OF SCHIZOTYPAL PERSONALITY DISORDEREdmundson, Maryanne 01 January 2010 (has links)
The current study provides convergent, discriminant, and incremental validity data for a measure of schizotypia from the perspective of the Five-Factor Model (FFM) of general personality structure. Nine schizotypia facet scales were constructed as maladaptive variants of respective facets of the FFM (e.g., Aberrant Ideas as a maladaptive variant of FFM Openness to Ideas). On the basis of data from 143 undergraduates the convergent validity of these nine facet scales was tested with respect to 11 established measures of schizotypia and the respective facets of the FFM. Discriminant validity was tested with respect to other personality disorders and facets from other FFM domains. Incremental validity was tested with respect to the ability of the FFM schizotypia facet scales to account for variance in two established measures of schizotypia, after variance accounted for by respective FFM facets and other established measures of schizotypia were first removed. The findings support the validity of these new facet scales as measures of schizotypia and as maladaptive variants of the FFM.
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