Glynnis is 14 months old. She is trying out new things, playing with her toys, and manipulating objects in new ways—experimenting with her environment. Glynnis is in which substage of Piaget's first cognitive stage?

Studies using the Social Readjustment Rating Scale have found that

a. stress causes illness. b. being married leads to more stress in one's life. c. having few LCUs almost always leads to health problems. d. students score lower than most people. e. there is a relationship between life changes and health changes.

Which of the following disorders occurs only when the gene involved is inherited from the mother and not the father?

a. Prader-Willi syndrome b. Angelman syndrome c. Fragile X syndrome d. Down syndrome