Abstract: This research compared the discrimination ability(A′)and response bias (B″)of preference discrimination (implicit memory) tests and recognition(explicit memory) tests with task dissociation paradigm by manipulating prime duration variable (250ms,500ms, 750ms)and attention variable (cued and uncued characters)of study phase.It was discovered that:(1)A cross over dissociation was found to demonstrate implicit memory with a process-pure assumption, although the criterion of the matched comparison method was not met.(2)In the preference (implicit)tests,a significant positive priming effect was discovered with the 500ms duration and cued characters.Meanwhile,a significant negative priming effect was also found with the 750ms duration and uncued characters.(3)When implicit and recognition memory occurred,a stable mental state accompanied with both forms of memory.However,the bias of preference tests was more liberal and that of the recognition tests was more conservative.

Key words: implicit memory, Chinese characters, preference discrimination tests, task dissociation, response bias