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Post-acquisition repetitive thought in fear conditioning: an experimental investigation of the effect of CS-US-rehearsal.

Abstract：

BACKGROUND AND OBJECTIVES:Although repetitive thought (e.g., worry) is generally assumed to be a risk factor for psychopathological disorders such as anxiety disorders, the repetitive thought processes occurring after a conditioning event have not yet received much theoretical attention. However, as repetitive thought can be mimicked by (mental) rehearsal, which is well-known to enhance memory performance, it seems worthwhile to explore the role of rehearsal in conditioning. Therefore, the current study investigates the impact of rehearsing an acquired CS-US-contingency on subsequent conditioned fear responding. METHODS:After acquiring two CS-US-contingencies with either a human scream or a white noise as US, participants were instructed to rehearse one of these CS-US-pairings during an experimental session as well as during the following week. RESULTS:Fear responding to the CS which was previously paired with the scream persisted in the participants who rehearsed the CS-US(scream)-contingency, but decreased in those participants who rehearsed the CS-US(noise)-contingency. The same pattern emerged in the US-expectancy ratings, but the effect failed to reach significance. For the CS which was paired with the noise-US, no rehearsal effect emerged. LIMITATIONS:As acquisition to the noise-US was less pronounced and less robust as compared to the scream-US, claims regarding the rehearsal effect might be hampered for the CS-US(noise)-contingency. CONCLUSIONS:Repetitive post-acquisition activation of a CS-US-contingency impacts CR retention. As the USs were not rated as more intense, aversive or startling after rehearsal compared to post-acquisition, US-inflation is discarded as a possible explanation of this effect.

journal_name

J Behav Ther Exp Psychiatry

journal_title

Journal of behavior therapy and experimental psychiatry

authors

Joos E,Vansteenwegen D,Hermans D

doi

10.1016/j.jbtep.2011.10.011

subject

Has Abstract

pub_date

2012-06-01 00:00:00

pages

737-44

issue

eissn

0005-7916

issn

1873-7943

pii

S0005-7916(11)00119-4

journal_volume

pub_type

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Post-acquisition repetitive thought in fear conditioning: an experimental investigation of the effect of CS-US-rehearsal.