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Psychological Research
Gepubliceerd in:

01-05-2009 | Original Article

Dissociating speed and accuracy in absolute identification: the effect of unequal stimulus spacing

Auteurs: Christopher Donkin, Scott D. Brown, Andrew Heathcote, A. A. J. Marley

Gepubliceerd in: Psychological Research | Uitgave 3/2009

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Abstract

Identification accuracy for sets of perceptually discriminable stimuli ordered on a single dimension (e.g., line length) is remarkably low, indicating a fundamental limit on information processing capacity. This surprising limit has naturally led to a focus on measuring and modeling choice probability in absolute identification research. We show that choice response time (RT) results can enrich our understanding of absolute identification by investigating dissociation between RT and accuracy as a function of stimulus spacing. The dissociation is predicted by the SAMBA model of absolute identification (Brown, Marley, Dockin, & Heathcote, 2008), but cannot easily be accommodated by other theories. We show that SAMBA provides an accurate, parameter free, account of the dissociation that emerges from the architecture of the model and the physical attributes of the stimuli, rather than through numerical adjustment. This violation of the pervasive monotonic relationship between RT and accuracy has implications for model development, which are discussed.
vorige artikel “Octave illusion” or “Deutsch’s illusion”?
volgende artikel Matching of visual input to only one item at any one time
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1
It is elementary to show that responses j and j + 1 have equal response strengths at the point that is midway between the long term referents for stimuli j and j + 1, and this holds for both equally spaced and unequally spaced stimulus sets.
 
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Metagegevens
Titel
Dissociating speed and accuracy in absolute identification: the effect of unequal stimulus spacing
Auteurs
Christopher Donkin
Scott D. Brown
Andrew Heathcote
A. A. J. Marley
Publicatiedatum
01-05-2009
Uitgeverij
Springer-Verlag
Gepubliceerd in
Psychological Research / Uitgave 3/2009
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-008-0158-2

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