Regarding the frequency with which psychological disorders occur, your authors note that about ________ of all Americans will have symptoms severe enough to meet the criteria for a diagnosis at some point in their lives

Which of the following statements about prevention and treatment of elder suicide is true?

A) Warning signs of suicide in late adulthood rarely include efforts to put personal affairs in order. B) Unlike younger adults, depressed older adults do not generally experience sleep and appetite changes. C) Caregivers must watch for indirect self-destructive acts, such as refusing food or medical treatment. D) Older suicide victims are less likely to have visited their doctors within a month of taking their lives.

A researcher investigating the effect of peer tutoring on reading skills studies two groups of children in remedial reading classes. One group receives peer tutoring three times a week for three months, the other group does not

At the end of the three months, the two groups are tested in reading skills. What is the independent variable in this experiment? a. peer tutoring versus no tutoring b. reading skills level at the beginning of the experiment c. reading skills level at the end of the experiment d. reading skills test itself