RUNNING HEAD: Cognitive Processes in Categorical and Associative Priming Cognitive Processes in Associative and Categorical Priming: A Diffusion Model Analysis

Cognitive processes and mechanisms underlying different forms of priming were investigated using a diffusion model approach. In a series of six experiments, effects of prime-target associations and of a semantic and affective categorical match of prime and target were analyzed for different tasks. Significant associative and categorical priming effects were found in standard analyses of RTs and error frequencies. Results of diffusion model analyses revealed that priming effects of associated primes were mapped on the drift rate parameter (v), while priming effects of a categorical match on a task-relevant dimension were mapped on the extra-decisional parameters (t0 and d). These results support a spreading activation account of associative priming and an explanation of categorical priming in terms of response competition. Implications for the interpretation of priming effects and the use of priming paradigms in Cognitive Psychology and Social Cognition are discussed. (141 Words)