Steve Is Participating in a Research Study and Has Been

Multiple Choice

Steve is participating in a research study and has been told that the focus of the study is on measures of memory.After the experiment begins,Steve notices certain aspects of the experiment and begins making some guesses about what behaviour the researcher might be looking for.In order to be a "good participant," Steve actually modifies his behaviour.This example best demonstrates the problem of:

A) random sampling.
B) the placebo effect.
C) experimenter expectancy effects.
D) demand characteristics.