Maslow- motivated by physiological, safety, belongingness, esteem, and self-actualization. needs arranged low to high
Alderfer- existence, relatedness, and growth. more than one need at a time.can go up or down the heirarchy of needs..
McClellads- Affiliation, achievment, and power.needs are learned. people are motivated by differerent things
lower order needs- concerned with safety, physiological, and existence requirements. need to be met first.
higher-order needs- concerned with relationships, challenges and accomplshments, and influence..
a schedule in which consequences are delivered after a specified or average time has elapsed or after a specified or average number of behaviors has occurred