When we look at a white house, we can recognize it as a white house by day or night and from any angle. This is due to perceptual _______

Melissa was mugged seven months ago and appears to have adjusted well. However, recently Melissa has been experiencing extreme fear, nightmares, and flashbacks about the mugging. Melissa would most likely be diagnosed with ____.?

a. ?obsessive-compulsive disorder b. ?posttraumatic stress disorder c. ?a social phobia d. ?a social phobia

For a two-factor study with two levels of factor A, 2 levels of factor B, and a separate sample of n = 10 participants in each treatment condition, what is dfwithin treatments?

A) ?9 B) ?18 C) ?36 D) ?39