A Researcher Is Interested in Whether Circadian Rhythms Influence Participants

Multiple Choice

A researcher is interested in whether circadian rhythms influence participants' performance on different kinds of memory tests.The researcher first classifies participants according to whether each is a morning person or an evening person.The researcher then randomly assigns participants to receive either an implicit memory test or an explicit memory test.The researcher then tests everyone at 8 a.m.What is(are) the main effect(s) being tested in the study?

A) type of person
B) memory test
C) type of person and performance
D) type of person and memory test