SOCI 217 Lecture 13: SOCI 217 lecture 13.pdf
Document Summary
How accurately to conclusions from an experiment represent what really happened. How good our experiment is at measuring what it was supposed to. The possibility that experimental conclusions may not accurately reflect what has happened in the experiment itself. The threat is present when anything other than the experimental stimulus affects the dependent variable. Whether something independent from the stimulus affected the dv (internal invalidity) Whether the two groups were comparable to begin with and only the one receiving the stimulus has undergone change in the dv. Pretest may sensitize subjects to reacting to the stimulus receiving the stimulus has undergone change in the dv. How generalizable an experiment/study is to real life. A possible threat to external validity could be the testing situation itself. Pretest may sensitize subjects to reacting to the stimulus. Their change in the level of dv is only replicated under experimental setting.
