According to Healthy People 2010, among Americans 18 years old and older, the percentage of individuals who engage in no leisure-time physical activity is

A change in performance on a task that is caused by the mere presence of others is called

a. the mere exposure effect. b. social facilitation. c. social influence. d. compliance. e. the bystander effect.

In Ivan Pavlov's initial experiments with dogs the food served as a conditioned stimulus

Indicate whether this statement is true or false.