"The following hypotheses were confirmed: 1. Prolonged visual exposure of a stimulus word results in a word association response less common than that elicited under brief exposure. 2. Individuals categorized as "permeable" (sensitive, imaginative, extravert) and "impermeable" (less sensitive to stimuli, rigid, withdrawn, introvert) differ with respect to satiation effects. The results are congruent with a response probability theory of conceptual processes.".