Forming a hypothesis is the second step in a scientific investigation. This step is derived from which goal of psychology?

A researcher is interested in the relationship between brain damage and the ability of humans to plan their behavior. This research is an example of a(n) ________ design

a. placebo control b. experimental c. correlational d. within-subjects

Susan trained her rat to press a bar in a Skinner box in order to get a food pellet. Susan's rat pressed the bar a lot. However, later when Susan ran out of food pellets her rat eventually stopped pressing the bar. What had happened?

a) conditioned aversion b) satiation c) extinction d) withdrawal