Related Experiment Video
Updated: Aug 20, 2026

A Modified Trier Social Stress Test for Vulnerable Mexican American Adolescents
Published on: July 10, 2017
A forced five-dimensional factor analysis and concurrent validity of the Positive and Negative Syndrome Scale in
A Fresán1, C De la Fuente-Sandoval, C Loyzaga
1Clinical Research Division, National Institute of Psychiatry Ramón de la Fuente, Calz. México-Xochimilco 101. Col. San Lorenzo, Huipulco., CP 14370 Mexico City, Mexico.
Unlabelled:
The heterogeneity of schizophrenic symptomatology is well documented. The positive-negative distinction is limited to cover the entire spectrum of schizophrenic psychopathology in order to describe the various clinical aspects of the disorder.
Method:
We recruited 150 schizophrenic patients between May 2002 and September 2003. Diagnoses were based on a structured clinical interview. The Positive and Negative Syndrome Scale (PANSS) was used to evaluate general psychopathology and symptom severity. For the concurrent validity of the pentagonal model of the PANSS, the BPRS, the CDSS, the OAS and the MMSE were used.
Results:
The forced five-factor principal-component analysis explained 53.4% of the total variance. There were significant correlations between the clinical rating scales and the five components of the PANSS.
Discussion:
Our data support a pentagonal model underlying the multidimensional schizophrenic symptomatology as assessed by the PANSS. The five-factor structure of the PANSS in Mexican schizophrenic patients enables further elucidation of the various clinical aspects of schizophrenia.
Related Concept Videos
Negative and Cognitive Symptoms of Schizophrenia
Negative Symptoms
Negative symptoms of schizophrenia manifest as deficits in normal emotional and behavioral functioning, profoundly impacting daily life. Individuals with schizophrenia often display a flat affect, characterized by a near-total absence of emotional expression,...
Positive Symptoms Schizophrenia: Hallucinations and Delusions
Hallucinations
Hallucinations in...
Psychological and Sociocultural Causes of Schizophrenia
Self-Report Tests of Personality
Personality Disorders: Paranoid and Schizoid
Paranoid Personality Disorder
Paranoid personality disorder is...
Five-Factor Theory of Personality
Openness reflects creativity, curiosity, and openness to new experiences. Individuals scoring high in openness are imaginative, have a wide range of interests, and are independent thinkers. Low...