PSY 250 Lecture Notes - Lecture 25: Convenience Sampling, Dishabituation, Habituation
Document Summary
Participants don"t just unlearn what you"ve taught them in a previous condition. Participating in repeated trials can result in poorer performance in later conditions. Repeated exposure to a stimulus may decrease responsiveness to that stimulus. Habituation to one stimulus may increase responsiveness to a different stimulus. Exposure to one stimulus may increase responsiveness to a different stimulus. Do so before the trial so that it is not part of the trial. Avoid presenting conditions in a fixed order to all participants. Think of all the different orders in which conditions can be presented. Interested in the cumulative effects of the conditions. Volunteers may be different and not representative of the true population. May affect the internal and external validity of research. Sample made up of volunteers is an imbalanced sample. Volunteers and non-volunteers may differ in important ways. Have a generally higher intelligence except for volunteers for atypical research. Except when the research involves physical or emotional stress.
