When more than one independent variable can account for obtained results, we say that the variables interact

One-year-old Cindy was playing a hiding game with her father. He hid her toy under a blanket and then Cindy would try to find it

Later, he added a second blanket and she watched him hide the toy under it. Interestingly, Cindy still looked under the first blanket. She was _____________. a. engaging in mental representation b. making the A-not-B error c. engaging in deferred imitation d. making an categorization error

The fact that rats running a maze will go directly to a food goal box instead of a previously learned longer route indicates that rats

a. learn a series of responses only. b. learn what turns to take in a maze to get to a reward. c. are smarter than monkeys when it comes to finding food. d. learn the location of the reward.