________ in quasi-experimental designs is more difficult than in true experiments because quasi-experimental designs lack the important features of true experiments such as random assignment to conditions.

Dr. Rowan is seeing a client who is afraid of dogs. If Dr. Rowan uses participant modeling therapy, how long is it likely to take for the client's phobia to be extinguished?

a) 15-20 minutes b) 3 or 4 hours c) 2 days d) 7-12 sessions

The Necker's cube and the Rorschach inkblots are good examples of

a. discontinuous figures. b. ambiguous stimuli. c. retinal disparity. d. motion parallax.