Member's in a(n) group normally have a DSM diagnosis.

After graduating from college, you are hired to work in a factory as an industrial psychologist. The workers put together IPODs. They can either be paid by the hour or by the number of IPODs they put together in a day

You decide that you will do the latter (pay by the number of IPODs put together). According to Skinner, you have put the workers on a fixed-ratio schedule. Indicate whether the statement is true or false.

Over time, John, a participant in a longitudinal study, became aware of his own thoughts, feelings, and actions, and consciously revised them when the investigator was present. This is an example of

A) cohort effects. B) practice effects. C) selective attrition. D) biased sampling.