Piaget's stage of cognitive development in which operations are carried out in action, not mentally, is:

In regard to teaching movement skills to the older adult, the following is true:

A.little research exists to assist trained professionals in designing and implementing older adult movement programs B. throughout the 1980s, specially trained individuals initiated numerous older adult movement programs C. most programs are designed by experts specifically trained for teaching movement skills to the older adult D. most programs are directed by experts specifically trained for teaching movement skills to the older adult

Which statement best captures the basic idea underlying the experimental method?

a. Sample participants carefully observe their behavior and report the results. b. One should describe and measure behavior under a wide variety of uncontrolled conditions. c. It is important to manipulate an independent variable to look for an effect on a dependent variable. d. A researcher manipulates a dependent variable to look for an effect on an independent variable.