The median age for walking for full-term infants is ____________________ while the median age for very low birth weight (VLBW) infants is ____________________

What was a key implication of Garcia and Koelling’s classic taste aversion studies?

a. ?The studies demonstrated the common traits of several species. b. ?The studies confirmed the applicability of classical conditioning in species other than canines. c. ?The studies demonstrated the relative interchangeability of stimuli. d. ?The studies highlighted the unique biological predispositions of specific species.

A substance that has no psychological or physical effect of its own, but appears to have an effect because of the beliefs of the people using it is called a(n) ______

a. initiative substance
b. confounding factor
c. placebo
d. neuter