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 ringing of the bell was the ______

The person MOST closely associated with the law of effect is __________

a. Thorndike b. Pavlov c. Watson d. Skinner

A researcher collects data on a group of children age 4 and another group age 6. He then waits three years, and collects similar data on these same groups of children, who now are age 7 and 9. His research design is an example of:

a. a sequential-cohort design b. a cross-sectional design c. a longitudinal design d. a correlational design