Affiliation:
1. Anacapa Sciences, Incorporated Santa Barbara, California
Abstract
The extra processing time required by incompatible S-R arrays has been explained in two ways: an increased number of processing stages or response competition from the compatible response. The additive factor method was employed, combining an S-R compatibility factor with a known response competition factor (a spatial Stroop task). The relationship between these two factors was shown to be an additive one, indicating that the two variables have their loci in (at least) two separate stages. This outcome is seen as persuasive evidence that longer reaction times for incompatible responses result from extra processing stages, rather than from response competition.