The most effective approach to estimate the heritability of a trait is to compare blood relatives within families

Freud's personality theory has ________

a. been completely supported by experimental research b. never been experimentally tested because its basic concepts are untestable c. not been supported by any experimental research findings d. received limited confirmation from experimental research

Your grandfather was diagnosed Alzheimer's disease several years ago. Your mother has been taking care of your grandfather for the past five years, which has been very difficult

As the Alzheimer's disease progressed, she was required to provide more assistance and by the time he died two months ago, he was less and less who he used to be. Your mother's grief for the loss of her father is likely accompanied by ____. a. severe depression b. physical and emotional exhaustion c. regret that she could not have done more d. relief at having her life back