For Skinner, the dependent variable is the rate of response.?

Researchers regard probability sampling as being desirable because

a. it is an easy and inexpensive way to generate useful research samples. b. it reduces the chance of obtaining too a diverse sample for the research. c. it gives us confidence that we can generalize from the sample to the population. d. it relies on using people who are readily available at any given time.

A car salesperson offers you a fairly good price on a car, and while you are debating about buying it, offers to add free gasoline for three months. What technique is this?

a. That's not all b. Foot in the door c. Bait and switch d. Reciprocation