Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Differential conditioning to facial emotional expressions: Effects of hemispheric asymmetries and CS identification
Autore:
Peper, M; Karcher, S;
Indirizzi:
Univ Freiburg, Dept Psychol, D-79085 Freiburg, Germany Univ Freiburg Freiburg Germany D-79085 sychol, D-79085 Freiburg, Germany
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 6, volume: 38, anno: 2001,
pagine: 936 - 950
SICI:
0048-5772(200111)38:6<936:DCTFEE>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
SKIN-CONDUCTANCE RESPONSES; UNILATERAL TEMPORAL LOBECTOMY; FEAR-RELEVANT STIMULI; HUMAN AMYGDALA; MASKED STIMULI; PREFRONTAL CORTEX; BACKWARD-MASKING; FUNCTIONAL MRI; VISUAL MASKING; MEMORY;
Keywords:
aversive learning; fear conditioning; hemispheric asymmetry; automatic affective response; visual masking;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
102
Recensione:
Indirizzi per estratti:
Indirizzo: Peper, M Univ Freiburg, Dept Psychol, Niemensstr 10, D-79085 Freiburg, Germany Univ Freiburg Niemensstr 10 Freiburg Germany D-79085 rg, Germany
Citazione:
M. Peper e S. Karcher, "Differential conditioning to facial emotional expressions: Effects of hemispheric asymmetries and CS identification", PSYCHOPHYSL, 38(6), 2001, pp. 936-950

Abstract

Previous studies on aversive learning have suggested a right hemispheric advantage for eliciting autonomic reactions to a masked conditioned facial stimulus (CS) depicting anger. The present study investigated the effects ofvisual field (VF), stimulus awareness, and emotional valence of the CSs onindicators of conditioning (bilateral SCRs, HR) using a differential conditioning paradigm (N = 41). In Group 1, four different negatively valenced facial expressions (CS+) but not four positively valenced CS- were associated with an unconditioned stimulus (US, aversive vocalization, 97 dB, 3 s) during acquisition. Group 2 received a treatment reversal with positive CS+ associated with the US. In a repeated measures design, CSs were presented with or without awareness during extinction (two weeks interval, order counterbalanced). SOAs were adapted for each subject and condition prior to the experiment so that identification performance was approaching chance level. The results revealed that both negative and positive facial expressions could be aversively conditioned providing evidence for a generalization of learning in the valence dimension. During extinction, preattentive negative CS presented to the left VF showed a trend towards greater electrodermal andcardiac reactions. However, no such effect emerged under full awareness ofthe CSs. These results confirm and further specify the nature of hemispheric asymmetries in emotional associative learning.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 21:44:31