A researcher posts advertisements for a student play. To determine the effectiveness of the advertisement, he compares the number of patrons attending on the day that was advertised and on a second day for which he did not advertise. What type of quasi-experimental research design is described in this example?

The beauty of birthday presents is that you get them once a year. No matter how much you beg, you generally will not get them until the full year has passed. This is an example of a __________ schedule of partial reinforcement

a. fixed interval b. variable interval c. variable ratio d. fixed ratio

Sexual behavior in a female rodent would be reduced or prevented by

a. an ovariectomy. b. targeted mutations of androgen receptors. c. targeted mutations (deletions) of aldosterone receptors. d. damage to the medial preoptic hypothalamus. e. damage to the prefrontal cortex.