PSY 340 Lecture Notes - Lecture 3: Case Method, Effect Size
Document Summary
So, (cid:449)e"(cid:448)e talked a(cid:271)out the sour(cid:272)es data (cid:272)a(cid:374) (cid:272)o(cid:373)e fro(cid:373) Can be estimated as the correlation between score on time 1 and score on time 2. Can be estimated as the correlation between score determined by rater 1 and score determined by rater 2. Can be estimated as the average inter-item correlations (correlations between items) and the number of items in the scale. Research designs: case method, correlational study, experimental study. Research designs: representative design: research should be designed to sample across the domains to which the investigator will wish to generalize their results, comes back to designing study so that the results are generalizable. Strength of results: significance testing, probability that the result of your study shows an effect (it looks like something is going on) When there really is no effect (but really there is nothing is going on) Is your result a fluke: effect size, the magnitude of an effect or strength of a relationship.
