1. First-order relatives of schizophrenic patients are not impaired in the Continuous Performance Test
- Author
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Eka Chkonia, Maya Roinishvili, Andreas Brand, and Michael H. Herzog
- Subjects
Nonpsychotic Relatives ,Parents ,Adult ,Male ,medicine.medical_specialty ,Psychosis ,Psychometrics ,Schizotypy ,Neuropsychological Tests ,Audiology ,Neuroleptic-Naive ,Young Adult ,medicine ,Sustained Attention Deficits ,Humans ,Family ,Psychiatry ,Signal-Detection ,medicine.diagnostic_test ,Siblings ,Continuous Performance Test ,Cognition ,Neuropsychological test ,Middle Aged ,First order ,medicine.disease ,Sustained attention ,Cognitive functions ,Cognitive Deficits ,Clinical Psychology ,Neurology ,First-order relatives ,Attention Deficit and Disruptive Behavior Disorders ,Schizophrenia ,Endophenotype ,Endophenotypic Marker ,Female ,Schizophrenic Psychology ,Neurology (clinical) ,1St-Degree Relatives ,Cognition Disorders ,Psychology - Abstract
Sustained attention deficits measured by the Continuous Performance Test (CPT) have been reportedly proposed as an endophenotype of schizophrenia. One requirement for an endophenotype is that unaffected first-order relatives must show deteriorated performance compared to healthy controls. We investigated 56 schizophrenic patients, 33 nonaffected first-order relatives, and 36 healthy controls in a degraded and an undegraded version of the CPT of the AX type. Performance of relatives and controls was roughly identical whereas schizophrenic patients performed worse right from the beginning. These results add further evidence that a deficit in the CPT performance is not an endophenotype of schizophrenia in accordance with previous studies.
- Published
- 2009