Chapter 12* Flashcards
Quasi experiment
A type of research design where a comparison is made, as in an experiment, but no random assignment of participants to groups occur.
Pre test post test design
A type of research design (often a quasi experiment) where behavior is measured both before and after each treatment or condition is implemented
History affect
Events that occurred during the course of a study to all or individual participants that can result in bias
Nonequivalent group
Groups compared in a study where participants are not randomly assigned
Regression towards the mean
Can occur when participants score higher or lower than their personal average. The next time they are tested, they are more likely to score near their personal average making scores unreliable
Testing effects
Occur when participants are tested more than once In a study with early testing affecting later testing
Solomon four group design
Pretest posttest design with two sets of non-equivalent groups, One set that takes the pretest and post test and one set that takes only post tests
Time series design
A research design where patterns of scores over time are compared from before a treatment is implemented and after a treatment is implemented.
Interrupted time series design
The timeseries design where the treatment is an independent event, such as a historical event
Non interrupted time series design
A time series design where the treatment is implemented by the researcher
History effect
Events that occurred during the course of a study to all participants or to individual participants that can result in a bias
Maturation
Natural changes that occur to the participants during the course of a study that can result in a bias
Attrition/mortality
Occurs when participants chose not to complete the study
Random assignment
Participants are randomly assigned to levels of the independent variable in an experiment control for individual differences as an extraneous variable
