Dr. Birk suggests that because depression is associated with pessimistic thinking, depressed students would be more likely than nondepressed students to perceive themselves as academically incompetent. Dr. Birk's prediction regarding students' self-perceptions is an example of a(n):
A) operational definition.
B) placebo effect.
C) confounding variable.
D) hypothesis.

In what two ways were the tang and song dynasties of china similar? they jointly built the grand canal. they were economically strong. they had weak military forces. they ruled for about 300 years. they discouraged buddhist ideas.

Who won the debate over ratifying the constitution

Nita is the office manager at a service station. two applicants, max and tim, arrive to interview for the open mechanic's position. max's clothes are dirty, his hair is unwashed, and he doesn't make eye contact when he gives nita his name. tim dresses in clean jeans and a nice shirt, is shaved, and shakes nita's hand when he introduces himself. after the interview, keith the head mechanic, asks nita what she thought. both men have the skill set needed for the position. nita recommends tim. she is responding to her perception of