Discuss field experiments

Discussing field experiments gives you a chance to re-emphasize the importance of independence of observations, standardization, power, random assignment, double-blind procedures, and well-conceived control groups.

Field experiments also lend themselves to introducing or reintroducing ethical issues and discussions of external validity.

Present field experiments and have students critique them in terms of construct validity, power, internal validity (we throw in some field studies to emphasize both the difference between field experiments and field studies and the value of random assignment), external validity (students tend to overestimate the field experiment's external validity), and meeting ethical standards.

Lively discussions often ensue (but discussions tend to be more informed if you assign or go over the Field Experiment Web Appendix).

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