Direct tests of knowledge :

 free recall (e.g., recall as many of the words from the list as you can)

recognition memory (e.g., which of these words do you remember as being on the list?)

Indirect tests of knowledge:

priming in lexical decision (is this a word in Chinese?) or perceptual identification (try to identify the word)

Reaction time effects (e.g., faster RTs for trained vs untrained sequences in SRT) 

conscious remembering strictly irrelevant to the task. but unconscious feelings of familiarity or perceived perceptual fluency may bias responses (e.g., Kinder & Shanks, 2003) 

Conclusion:  we can't assume that tests of implicit and explicit knowledge are necessarily process pure. 

Dissociations between direct and indirect tests do not necessarily prove that there are distinct underlying knowledge systems.