PSYC 2230 Lecture Notes - Lecture 8: Statistical Conclusion Validity, Blind Experiment, Smoking Cessation
Document Summary
The research design you choose is based on the questions you ask and ho you define your variables. A casual relationship between the iv and dv can be established. Independent variable manipulated by the researcher ex. Brightness of a lamp, loudness of a tone etc, has at least two different conditions. Can see if your performance increases or decreases in each situation given. Example: two versions of the exam could be interested in seeing if the coloured paper would have an impact on grades. If you had pink, blue and yellow paper that would be 3 independent levels. True experiment we test the effects of a manipulated iv. Sometimes subject variables are used characteristics of a participant themselves (gender, age, intelligence, personality). Cannot make causal statements about the manipulation between variables. Dependent variable measured by the experimenter, used to determine the affect of the iv. If hypothesis is correct different values of iv should produce changes in dv.
