By pairing the ringing of a bell with the presentation of meat, Pavlov trained dogs to salivate to the sound of a bell even when no meat was presented. In this experiment, the presentation of the meat was the _______

Dr. Rodin is conducting a study on environmental factors that contribute to telomere length. Dr. Rodin can expect to find that telomere shortening

A) predicts longevity. B) is related to slowed disease progression. C) is accelerated by certain health behaviors and psychological states. D) occurs earlier in women than men.

Generalizing from research reported in the text, you would expect that a shy child would be most likely to also be popular if that child were being raised in which of the following countries?

a. China b. the United States c. England d. Canada