Examlex
Explain and give examples of positive symptoms of schizophrenia.
Pretest
An initial test or assessment conducted before the main test or experiment to evaluate participants' baseline abilities, knowledge, or attitudes.
Pretest-Posttest
A research design that measures the effect of an intervention by comparing conditions before and after the intervention is applied.
Posttest-Only
A research design where measures are taken only after the experimental manipulation, without a pretest comparison.
Mortality
The loss of subjects who decide to leave an experiment. Mortality is a threat to internal validity when the mortality rate is related to the nature of the experimental manipulation.
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