Ear-response side and ear-hand components of lateral stimulus-response (S-R) compatibility were examined as a function of information processing complexity in two experiments. Experiment I investigated the compatibility effect in Bonders' c (two stimuli-one response) and Bonders' b (two stimulitwo responses) choice reaction time (RT) paradigms. A second experiment examined the same effects in a Bonders' a (simple) RT paradigm. Neither earhand nor ear-response location correspondence were evident in the a RT, but both were significant in the b and c. Ear-hand correspondence was not differentially affected by task complexity but ear-response side correspondence significantly increased from c to b and became more symmetrical. The RTs were significantly faster to right ear stimulation in the a task but significantly faster to left ear stimulation in tasks 6 and c. The results are discussed in terms of stage theory of information processing and in terms of their relevance for examination of functional asymmetry.

The purpose of this paper is to recommend a simple iterative process to solve minimization problems in chemistry when the number of parameters is small, as is the case in most empirical laws.

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