Further evidence for "hyper-priming" in thought-disordered schizophrenic patients using repeated masked category priming.
BACKGROUND
Previous research has yielded evidence for enhanced semantic priming in formal thought-disordered schizophrenia patients, a result that fits well with the hypothesis of disinhibited processes of spreading activation in this population.


METHODS
The present study tested this hypothesis by using masked repetition priming, which yields reversed semantic priming effects in healthy participants. Assuming that performance in this paradigm relies on a balance between activation and inhibition processes in healthy participants, we compared formal thought-disordered schizophrenia patients, non-thought disordered schizophrenia patients, and healthy controls.


RESULTS
For thought-disordered schizophrenia patients, we found a large positive semantic priming effect for dominant category exemplars (primed by the category name), whereas healthy controls had a small negative effect. For non-thought disordered patients, we found a non-significant, numerically positive effect.


CONCLUSIONS
This result yields further evidence for the lack of inhibitory processes in thought-disordered patients.
Wentura
Dirk
D
Saarland University, Department of Psychology, Saarbrücken, Germany. wentura@mx.uni-saarland.de
Moritz
Steffen
S
Frings
Christian
C
D000328:Adult; D003072:Cognition Disorders / Q000175:diagnosis* / Q000523:psychology; D035061:Control Groups; D005260:Female; D006801:Humans; D007806:Language Disorders / Q000175:diagnosis / Q000523:psychology; D008297:Male; D008569:Memory Disorders / Q000175:diagnosis / Q000523:psychology; D009483:Neuropsychological Tests; D010153:Paired-Associate Learning / Q000502:physiology; D010470:Perceptual Masking / Q000502:physiology; D011569:Psychiatric Status Rating Scales; D011578:Psycholinguistics; D011930:Reaction Time / Q000502:physiology; D012559:Schizophrenia / Q000175:diagnosis*; D012565:Schizophrenic Psychology; D012660:Semantics; D014705:Verbal Behavior / Q000502:physiology; D014825:Vocabulary; D014936:Word Association Tests