Identifying, acquiring, and developing valid and reliable instruments are major problems facing researchers who study psychosocial drug use and abuse. Much time is often devoted to creating a measuring device when an adequate one already exists, resulting in duplication of effort, considerable waste of resources, and loss of uniform comparability…

The Barnum Effect was generated to teach students about the ethics of deception in research and the feelings of subjects who are deceived. The Barnum Effect occurs when individuals are duped into believing invalid results of psychological tests. People are most accepting when given favorable feedback about themselves. They interpret evaluations as…