Natural family planning works best for women who have very regular menstrual cycles

One difficulty of the current system of education in the United States of America is that some students are put into advanced placement (AP) classes, while some students are put into basic classes

Not surprisingly, students who are told that they are expected to excel tend to show better learning and results in their classes, while students who are not told that they are expected to excel tend not to. This result is one example of the __________ confirmation. a. behavioral expectation b. self-serving c. population bias d. dispositional

Human twin studies suggest that aggressiveness is a. heritable, and impulsive aggression is particularly so

b. heritable, and premeditated aggression is particularly so. c. almost entirely the result of learning. d. heritable in males, but not in females.