The symbolic content of a dream is called:

External validity is defined as?

a) attempts to maximize efficacy, allowing the researcher to feel confident in identifying causal relationships. b) the extent to which the study design allows conclusions that the intervention (IV) caused changes in the outcome (DV). c) the ability to generalize study findings to situations and people outside the experimental setting. d) attempts to replicate "real" world results.

Hans Eysenck added a third trait to his theory; the trait of

A) conscientiousness B) psychoticism C) patience D) despair