____ entails sexual arousal as a result of watching unsuspecting people undress or have sex.

The five kinds of play identified by Mildred Parten (1932), including solitary, onlooker, parallel, associative, and cooperative, are sequential, such that each subsequent one is more interactive than the previous one

Indicate whether this statement is true or false.

Dr. Falcone is working on a study where she is interested in measuring age differences in problem-solving behavior across the lifespan

To conduct this study, she brings into her laboratory a group of 5-year-old, 10-year-old, 20-year-old, and 50-year-old subjects at one time, and measures the subjects' ability to solve a number of word problems. It appears as though Dr. Falcone is carrying out a a. longitudinal design. b. cross-sectional design. c. a "true" laboratory experiment with a high degree of internal validity. d. naturalistic observational design.