_________ refers to the tendency for objects that are near to one another to be grouped

What is most likely the biggest problem with longitudinal research?

changing ages of participants not being able to keep participants over time changing historical context participants becoming aware of the goals of the study and changing their behaviors or answers

Unlike explicit memory, implicit memory

A) involves no deliberate attention or effort. B) keeps track of important events from our lives. C) refers to our factual knowledge. D) requires conscious awareness.