If every increase of one point on a test-anxiety scale is associated with a decrease of 2 points on predicted performance on a test, 2 represents the slope, which is also the

Gil describes his son as calm and cautious. He describes his daughter as cheerful and energetic. Gil's descriptions refer to

A) effortful control. B) categorical self. C) temperament. D) level of reactivity.

One of the characteristics of Lesch-Nyhan syndrome is that

A) it only occurs in girls because it is a recessive trait requiring two X chromosomes. B) it only affects boys since the genetic mutation is found on the Y chromosome. C) nearly all children who develop the disorder have severe, chronic self-injurious behavior. D) as with phenylketonuria, children require a strict dietary regimen until age 8 to prevent intellectual disability.