Skill acquisition and implicit memory became significant growth areas in cog­ nitive psychology during the last decade. Skill acquisition is dominated by the claim that the impact of practice on performance may be explained by reference to one process or principle over a broad, even universal set of tasks. Implicit memory has also been adopted by scientists with a broad range of interests, ranging from personality theory to advertising as well as mainstream problems concerning face, word, and object recognition. In this chapter we test the propo­ sition that skill acquisition and implicit memory may be subsumed under a single theory or principle, thereby advancing the cause of synthesis and reduction in this otherwise expanding area.