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Journal ofExperimentalPsychology: Copyright 1998by theAmerican PsychologicalAssociation, Inc. HumanPerceptionand Performance 0096-1523/98/$3.00
 

Summary: Journal ofExperimentalPsychology: Copyright 1998by theAmerican PsychologicalAssociation, Inc.
HumanPerceptionand Performance 0096-1523/98/$3.00
1998,Vol.24,1"4o.1,301-321
OBSERVATIONS
Selective Attention and the Formation of Linear Decision Boundaries:
Comment on McKinley and Nosofsky (1996)
W. ToddMaddox
Arizona State University
E GregoryAshby
University of California, Santa Barbara
S. C. McKinley and R. M. Nosofsky (1996) compared a linear decision-bound model with the
generalized context model (GCM) in their ability to account for categorization data from
experiments that used integral- or separable-dimensionstimuli and required selective attention
or attention to both dimensions. McKinley and Nosofsky (1996) found support for the GCM
and concluded that decision-bound theory needs to incorporate assumptions about selective
attention. In this commentary it is argued that (a) unlike the GCM, decision-bound theory
provides a framework for independently investigating perceptual and decisional forms of
selective attention; (b) the effect of stimulus integrality on the form of the optimal decision
bound is misinterpreted; (c) averaged data is biased against decision-bound theory and toward
the GCM; (d) many a priori predictions ofthe GCM are violated empirically; and (e) exemplar

  

Source: Ashby, F. Gregory - Department of Psychology, University of California at Santa Barbara

 

Collections: Biology and Medicine; Computer Technologies and Information Sciences