PSYC 203 Lecture Notes - Lecture 6: Statistical Conclusion Validity, Internal Validity, Peer Pressure
15 Feb 2017
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No guest speaker questions (only for the final exam) Try to keep all other factors constant. Measure the impact on some behaviour of interest. Should have some additional features: control group (doors with no signs, replicate the study & make sure you have enough data (big enough sample size, lab environment more sterile, random assignment, follow-up questions (introspective report) What is our dependent measure: percentage of people that conform to going through their assigned door. Prediction: people are more likely to go through their assigned door. If x, then y: ex. increase in alertness is an outcome of drinking coffee. Drinking coffee is sufficient to increase alertness. If not x, then not y: e(cid:454). whe(cid:374) (cid:374)ot dri(cid:374)ki(cid:374)g (cid:272)offee, (cid:271)e(cid:272)o(cid:373)e tired, heart rate does(cid:374)"t i(cid:374)(cid:272)rease, drowsi(cid:374)ess. Drinking coffee is necessary to increase alertness. Together x is necessary & sufficient for producing y. Agreement analogous to experimental group: ex. experimental treatment is related to the behaviour outcome.
