title: An analysis of the cognitive deficit of schizophrenia based on the Piaget developmental theory.
abstract: OBJECTIVE
  The objective of the study was to evaluate from the perspective of the Piaget developmental model the cognitive functioning of a sample of patients diagnosed with schizophrenia.
  
  
  METHODS
  Fifty patients with schizophrenia (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition) and 40 healthy matched controls were evaluated by means of the Longeot Logical Thought Evaluation Scale.
  
  
  RESULTS
  Only 6% of the subjects with schizophrenia reached the "formal period," and 70% remained at the "concrete operations" stage. The corresponding figures for the control sample were 25% and 15%, respectively. These differences were statistically significant. The samples were specifically differentiable on the permutation, probabilities, and pendulum tests of the scale.
  
  
  CONCLUSIONS
  The Longeot Logical Thought Evaluation Scale can discriminate between subjects with schizophrenia and healthy controls.
authors.affiliation: Department of Psychiatry, Hospital Nicolas Peña, Complejo Hospitalario Universitario de Vigo, 36200 Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Torres
authors.forename: Jose M
authors.initials: JM
authors.lastname: Olivares
authors.forename: Angel
authors.initials: A
authors.lastname: Rodriguez
authors.forename: Antonio
authors.initials: A
authors.lastname: Vaamonde
authors.forename: German E
authors.initials: GE
authors.lastname: Berrios
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001921:Brain / Q000254:growth & development; D002648:Child; D002657:Child Development / Q000502:physiology; D003071:Cognition / Q000502:physiology; D003072:Cognition Disorders / Q000175:diagnosis* / Q000523:psychology; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D008960:Models, Psychological; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D011582:Psychological Theory; D011594:Psychometrics; D012559:Schizophrenia / Q000175:diagnosis*; D012565:Schizophrenic Psychology