title: A novel perceptual discrimination training task: Reducing fear overgeneralization in the context of fear learning.
abstract: Generalization is an adaptive learning mechanism, but it can be maladaptive when it occurs in excess. A novel perceptual discrimination training task was therefore designed to moderate fear overgeneralization. We hypothesized that improvement in basic perceptual discrimination would translate into lower fear overgeneralization in affective cues. Seventy adults completed a fear-conditioning task prior to being allocated into training or placebo groups. Predesignated geometric shape pairs were constructed for the training task. A target shape from each pair was presented. Thereafter, participants in the training group were shown both shapes and asked to identify the image that differed from the target. Placebo task participants only indicated the location of each shape on the screen. All participants then viewed new geometric pairs and indicated whether they were identical or different. Finally, participants completed a fear generalization test consisting of perceptual morphs ranging from the CS + to the CS-. Fear-conditioning was observed through physiological and behavioural measures. Furthermore, the training group performed better than the placebo group on the assessment task and exhibited decreased fear generalization in response to threat/safety cues. The findings offer evidence for the effectiveness of the novel discrimination training task, setting the stage for future research with clinical populations.
authors.affiliation: Department of Psychology, University of Haifa, Abba Hushi 199, Mt Carmel, Haifa, Israel.
authors.forename: Rivkah
authors.initials: R
authors.lastname: Ginat-Frolich
authors.affiliation: Department of Psychology, University of Haifa, Abba Hushi 199, Mt Carmel, Haifa, Israel.
authors.forename: Zohar
authors.initials: Z
authors.lastname: Klein
authors.affiliation: Department of Psychology, University of Haifa, Abba Hushi 199, Mt Carmel, Haifa, Israel.
authors.forename: Omer
authors.initials: O
authors.lastname: Katz
authors.affiliation: Department of Psychology, University of Haifa, Abba Hushi 199, Mt Carmel, Haifa, Israel. Electronic address: tshechner@psy.haifa.ac.il.
authors.forename: Tomer
authors.initials: T
authors.lastname: Shechner
mesh_terms: D000328:Adult; D003214:Conditioning, Classical / Q000502:physiology; D004193:Discrimination Learning / Q000502:physiology*; D005239:Fear / Q000523:psychology*; D005260:Female; D005793:Generalization, Psychological / Q000502:physiology*; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D055815:Young Adult
keywords: Fear conditioning; Fear learning; Fear overgeneralization; Generalization