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16 Cards in this Set

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What is the probability of rejecting the null when it's true?
Type I error
What is the probability of accepting the null when it's false?
Type II error
What organizees what is already known?
Deductive reasoning
What is used to establish a general conclusion on the basis of facts gathered through direction observation?
Inductive reasoning
Consists of only 1 group
Nonexperimental
Consists of 2 more or groups
experimental
What is the degree to which data in a study reflects a true cause-effect relationship?
Internal validity
What are some threats to internal validity?
Instrumentaion, history, statistical regression, maturation, attrition, testing, subject selection biases, interaction of factors
What is statistical regression?
Behavior that goes from an extreme high or low point to an average level
What is external validity?
Regers to generalizability to what settings, populations, treatment variables, measurement variable the effect can be generalized.
What are the threats to external validity?
Hawthorne effect, multiple treatment interference, and reactive or interactive effects of pretesting
What is the Hawthorne effect?
Extent to which a study's results are effected by participants' knowledge that are taking part in an experiment.
What is subject selection biases?
Subjective factors that influence the selection of who partiipants in a study.
What is considered Class I evidence?
Randomized group exp. design. Best evidence supporting a procedure.
What is considered Class II evidence?
Based on well designed studies that compare the performance of groups that are not randomly selected.
What is considered Class III evidence?
Based on expert opinion and case studies.