Crocker, who has worked on a series of self-esteem studies, found in her latest research that college students who based their self-worth on external sources--including appearance, approval from others and even their academic performance--reported more stress, anger, academic problems, relationship conflicts, and had higher levels of drug and alcohol use and symptoms of eating disorders.
For the study, Crocker surveyed more than 600 college freshmen three times during the year--before