We Like to Believe That the Only Major Influence on Participant

Multiple Choice

We like to believe that the only major influence on participant performance in an experiment is the manipulation of the independent variable. In fact, some research has shown that

A) performance can be influenced by the participants' perceptions of what the experimenter "wants" them to do.
B) human behavior is relatively uninfluenced by manipulation of environmental conditions.
C) human participants are very good at figuring out the purpose of an experiment, and enjoy subverting the research by giving data that disconfirm the hypothesis.
D) manipulations of environmental conditions are to powerful to test in research.