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4. Briefly describe the three main features of a true experiment (classic experimental design). (p.135) What is a quasi-experimental design? (p. 139) What are the two types of quasi-experimental designs listed in the text? (nonequivalent control group designs: example from lecture: static group comparison; AND before and after designs: example fromlecture: one group pre-test post-test design). (p.139-142) What is the one-shot case study? How are the static group comparison and one group pre-test post-test designs improvements over one-shot case studies? (book and lecture)5. What is a control group? (p.135) An experimental (treatment) group? (p.135) Why are control groups so important for experimental design? (book and lecture)