While Conducting Research on Intelligence, a Group of Experimenters Was

Multiple Choice

While conducting research on intelligence, a group of experimenters was very careful to control for unwanted variability in such factors as age, gender, ethnic background, socioeconomic status, and so on. They took these precautions in order to avoid or minimize the influence of:

A) extraneous or confounding variables.
B) dependent or outcome variables.
C) demand characteristics.
D) practice effects.