An interaction is observed when the effect of one variable changes at different levels of a second variable

________ results from drinking alcohol during pregnancy, and is the leading known preventable environmental cause of mental retardation.

a. Attention deficit disorder b. Oppositional defiant disorder c. Conduct disorder d. Fetal alcohol syndrome

Repeated exposure to particular experiences results in the development of "known" combinations of activities, or expectancies. This describes which of the following?

A) Observational processing B) Schematic learning C) Operant conditioning D) Classical conditioning