Psychology 2032A/B Quiz: The Experiment

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Internal validity = the extent to which the experimental effect can be attributed to the iv: control group = does not receive experimental treatment. Clear definition of the sample being studied e. g. description of diagnoses. Clear description of treatment being offered (in a manual) Large enough sample for statistical tests: randomized controlled trials (rcts) = studies in which clients are randomly assigned to receive active treatment of a comparison. Single-case experiments = experimenter studies how one person responds to manipulations of the iv *high internal validity: lack of external validity, just because treatment works for one person doesn"t mean it will work for another. Reversal design (abab design) = participant"s behaviour must be carefully measured in a specific sequence (baseline, treatment intro, reinstatement of baseline, reintroduction of treatment: no control group, but time period of baseline serves as control aspect.