When Are Laboratory Experiments Desirable

Multiple Choice

When are laboratory experiments desirable?

A) when the sample should be representative of the population to which the results are generalized
B) when the experiment's context and conduct are natural so that the subjects behave realistically
C) when the intent of the experiment is to achieve high levels of external validity
D) when the intent of the experiment is to achieve high levels of internal validity
E) when the intent is to achieve high external validity and moderate internal validity