Document Detail

The influence of trial-to-trial recalibration on sequential effects in cross-modality matching.
MedLine Citation:
PMID:  17106705     Owner:  NLM     Status:  MEDLINE    
Sequential effects are examined in a cross-modality matching experiment where observers adjusted the loudness of a tone in response to presented lengths of a metal tape. In one condition, the initial level of the tone to be adjusted was the same as the final adjusted level of the previous trial, whereas in another condition, the tone to be adjusted was reset to a different level before each trial. A fit of the DeCarlo-Cross dynamic model shows that the primary effect of the manipulation was on a judgmental factor, with little or no effect on a perceptual factor. We suggest that starting a trial with the tone at the final adjusted level of the previous trial induced the observer to rely more heavily on the loudness-length pair of the previous trial as a frame of reference for relative judgment; we call this reliance trial-to-trial recalibration. In contrast, when the tone is set to a level independent of its value on the previous trial, there is virtually no effect of one trial on the next trial's performance, a result consistent with the observer maintaining a stable frame of reference. We argue that sequential effects are not unavoidable and that the technique described here adds to a growing list of methods for reducing or eliminating them.
Martha Teghtsoonian; Robert Teghtsoonian; Lawrence T DeCarlo
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Publication Detail:
Type:  Journal Article     Date:  2006-11-15
Journal Detail:
Title:  Psychological research     Volume:  72     ISSN:  0340-0727     ISO Abbreviation:  Psychol Res     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-01-22     Completed Date:  2008-06-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0435062     Medline TA:  Psychol Res     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  115-22     Citation Subset:  IM    
Department of Psychology, Smith College, Northampton, MA 01063, USA.
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MeSH Terms
Discrimination Learning*
Distance Perception*
Knowledge of Results (Psychology)*
Loudness Perception*
Models, Statistical
Practice (Psychology)*

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