A _______________ is an experiment in which neither the participants nor the individuals running the experiment know if a given participant is in the experimental or the control group until after the results are tallied

The newspaper contains a report of a research team in Europe that has found a brain area in a group of schizophrenic patients that is smaller than the same area in normal individuals. The article was written by a well-known science writer who has a keen

keen understanding of schizophrenia. What is he likely to conclude? a. Dietary factors account for most differences in brain size. b. A complex disorder such as schizophrenia is not likely to be traced to a single brain site. c. The differences are probably the result of differences in the size of the individuals that made up the respective groups. d. Most such differences have been found to be the result of drug treatments for the disorder and not reflections of some underlying cause.

Elias believes that gun control is necessary. Which of the following would cause Elias to change his attitude the most?

a. He hears a speech against gun control, then gives a speech that takes a similar position. b. He anticipates giving a speech against gun control, and then gives the speech. c. He anticipates giving a speech for gun control, and then must give a speech against it. d. He gives a speech for gun control, followed by a speech against it.

The main difference between live and symbolic models has to do with

a. how they are observed. b. the likelihood of acceptance. c. what behaviors they change. d. the types of imitation elicited.

The term statistical significance implies that the results are ________________

A) important B) extremely meaningful C) valid D) not likely due to chance