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[Cognitive inhibition and psychopathology: toward a less simplistic conceptualization]
1Ecole de Psychologie, Université Laval, Sainte-Foy, Québec, Canada.
L'Encephale
|June 20, 2000
Summary
Cognitive inhibition, indicated by negative priming, is not an automatic brake but a strategic process. Deficits in pathological subjects may reflect less adaptive strategies rather than a faulty inhibitory mechanism.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Psychopathology
Background:
- Cognitive inhibition, evidenced by negative priming, is crucial for task performance and suppressing distractors.
- Negative priming, where reaction time slows due to inhibiting a previous distractor, is a key indicator.
- This concept has been extended to explain deficits in conditions like depression and schizophrenia.
Purpose of the Study:
- To review experimental evidence on cognitive inhibition in normal subjects.
- To revise the concept of cognitive inhibition based on new findings.
- To re-interpret cognitive deficits in pathological conditions.
Main Methods:
- Review of experimental evidence on negative priming in normal subjects.
- Analysis of how situational factors influence negative priming.
- Re-interpretation of negative priming deficits in depression and schizophrenia.
Main Results:
- Negative priming in normal subjects is context-dependent and strategic, not automatic.
- Pathological deficits in negative priming may stem from maladaptive strategic adjustments.
- Depression shows varied negative priming effects (reduced or exaggerated) linked to cognitive resources or response verification.
- Schizophrenia exhibits a lack of negative priming, possibly due to instruction integration issues.
Conclusions:
- Cognitive inhibition is a strategic executive function, not a simple inhibitory brake.
- Pathological deficits are better understood as altered strategic processing in executive functions.
- This revised model better explains cognitive impairments in depression and schizophrenia.