Related Experiment Video
Updated: Jul 7, 2026
10:32
Development of a Virtual Reality Assessment of Everyday Living Skills
Published on: April 23, 2014
Intellectual capacity measurement in schizophrenia.
L Chamorro1, M V de Felipe, M M Soler
1Psychiatry Department, Universidad de Alcalá, Madrid, Spain. lchamorro@sescam.org
Actas Espanolas De Psiquiatria
|April 4, 2008
Summary
Cattell's intelligence test effectively measured cognitive function in schizophrenia patients. Risperidone treatment significantly improved intelligence quotient (IQ) and psychotic symptoms over one year.
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Science
Background:
- Intellectual capacity (IC) is clinically relevant in schizophrenia patients.
- Cattell's intelligence test offers a user-friendly tool for assessing IC in clinical settings.
Purpose of the Study:
- To evaluate the utility of Cattell's intelligence test for measuring cognitive performance in schizophrenia.
- To assess the impact of risperidone treatment on the intelligence quotient (IQ) of schizophrenic patients.
Main Methods:
- 35 schizophrenic patients were assessed using Cattell's intelligence test.
- IQ was measured before and after one year of risperidone treatment.
- Symptom severity was evaluated using the Positive and Negative Syndrome Scale (PANSS).
Main Results:
- Baseline average IQ was 78.3 (SD: 14.3), indicating low-medium intelligence.
- After one year of risperidone, IQ significantly improved to 84.8 (SD: 17.0; p = 0.028).
- IQ improvement correlated positively with reduced psychotic symptoms (PANSS).
Conclusions:
- Cattell's intelligence test is a valid instrument for assessing cognitive function in schizophrenia.
- Risperidone therapy may improve cognitive functioning in schizophrenia patients.
- Cognitive improvements are linked to reductions in psychotic symptom severity.
Related Concept Videos
01:29Intellectual Disability
Intellectual disability (ID) is a neurodevelopmental condition characterized by deficits in intellectual and adaptive functioning that manifest during the developmental period. This condition encompasses challenges in reasoning, memory, problem-solving, and learning, accompanied by impairments in everyday life skills, such as communication, self-care, and social interactions. Intellectual disability affects approximately 1% of the population in the United States, impacting an estimated 5...
01:23Wechsler's Contribution to Measures of Intelligence
David Wechsler, a psychologist who worked with World War I veterans, developed a significant IQ test in 1939 called the Wechsler-Bellevue Intelligence Scale. This test was innovative because it combined several subtests that measured both verbal and nonverbal skills, reflecting Wechsler's belief that intelligence is a global capacity involving purposeful action, rational thinking, and effective interaction with the environment. This test later evolved into the Wechsler Adult Intelligence Scale...
01:29Measures of Intelligence
Psychologists measure intelligence by using standardized tests that produce a score known as the intelligence quotient or IQ. To understand IQ tests, it's important to recognize the key principles behind their construction: validity, reliability, and standardization.
Validity refers to how well a test measures what it claims to measure. An intelligence test should accurately assess intelligence rather than another characteristic, like anxiety. Criterion validity is one way to evaluate this; it...
Validity refers to how well a test measures what it claims to measure. An intelligence test should accurately assess intelligence rather than another characteristic, like anxiety. Criterion validity is one way to evaluate this; it...
01:23Binet's Contribution to Measures of Intelligence
Alfred Binet, along with his student Théophile Simon, was tasked by the French Ministry of Education in 1904 to create a method for identifying students who struggled to learn through conventional classroom instruction. This initiative aimed to address overcrowding by placing such students in specialized schools. Binet and Simon developed an intelligence test comprising 30 tasks, ranging from simple commands, like touching one's nose or ear, to more complex tasks, such as drawing designs from...
01:24Triarchic Theory of Intelligence
Robert Sternberg's triarchic theory of intelligence posits that intelligence is composed of three distinct but interrelated components: analytical, creative, and practical intelligence.
01:27Intelligence
The term "intelligence" is complex because it refers to both behavior and individuals, and its interpretation varies across cultures. European Americans tend to link intelligence with reasoning and cognitive skills, while in Kenya, it is tied to responsible participation in family and social life. In Uganda, intelligence is seen as the ability to know the right actions and carry them out effectively, while the Iatmul people of Papua New Guinea associate it with the capacity to remember detailed...