Prefixes, suffixes, and words are examples of ________

Which of the following athletes' skills will probably peak latest in life?

A) Rod, a sprinter B) Reba, a tennis player C) Rolf, a long-distance runner D) Rita, a high-jumper

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

To conduct this study, he brings into his laboratory a group of 5-year-old children, measures the subjects' ability to solve a number of word problems, and asks these same subjects to return to his laboratory once every 5 years for the next 20 years so that he can remeasure their performance on similar tasks. 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.