You can identify a letter more accurately when it appears in a word than when it does not. This phenomenon is called the

Ted's pediatrician has prescribed Ritalin for the fourth-grader. Which of the following is the most likely prescribed dosage regime?

a. Ted will take a single dose every morning before school. b. Ted will take one dose each day when he feels the need to concentrate. c. Ted will take one dose per week throughout the year and into his adolescent years. d. Ted will take one dose in the morning and another at lunchtime, with a possible third dose after school.

The Pygmies of Central Africa and the Arapesh of New Guinea live in peace and harmony. Formerly peace-loving, the Iroquois became a fierce and aggressive Native American tribe in the seventeenth century. These examples illustrate that

A) humans will always eventually exhibit aggressive tendencies. B) in humans, innate behavioural patterns, including aggression, are infinitely malleable and modifiable. C) there are strong regional differences in the endorsement of aggression as a solution to social problems. D) humans, lacking inhibitory mechanisms, must rely on cultural norms to curb aggression. E) frustration often contributes to aggression in otherwise peaceable societies.