Rank correlations on latent inhibition learning among internal scorers versus external scorers on Rotter's I-E locus of control scale were compared between trial numbers and speed of correct reactions in a left- and in a right-hemispheric discrimination task. On the basis of previous research and theorizing reviewed by De Brabander, Boone, and Gerits (1992) we expected latent inhibition effects to show mainly on the left-hemisphere task and more clearly among internal scorers on Rotter's I-E locus of control scale. The findings seem to confirm our expectations.