Which of the following researchers developed a classification system for infant attachment?

What was one of Mary Whiton Calkins's major accomplishments?

a) offering the definition of psychology used today b) establishing the first school of psychology to offer degrees to women c) developing the statistical methods that made experimental research possible d) being elected the first woman president of the American Psychological Association

Which of the following have studies shown to be an effective way of increasing happiness?

a. doing just 50 jumping jacks each day b. trying to be more optimistic c. being reckless with one's obligations and responsibilities d. engaging in downward social comparisons