PSYCH 3325 Lecture Notes - Lecture 2: Dependent And Independent Variables, Informed Consent, Errors And Residuals

• School: Ohio State University
• Department: Psychology
• Course: PSYCH 3325
• Professor: Ian Roberts

Document Summary

Used to see the effect of one variable on another. Independent variable (iv): what is manipulated by the experimenter, the (cid:862)(cid:272)ause(cid:863, multiple levels a. k. a. conditions, ex: tylenol vs. Placebo, strong persuasive argument vs. weak persuasive argument. Random assignment: helps to avoid confounding variables, randomly assign participants to (cid:272)o(cid:374)ditio(cid:374)s, u(cid:374)likely that you"ll ha(cid:448)e (cid:272)o(cid:374)fou(cid:374)di(cid:374)g (cid:448)aria(cid:271)les. In order to be sure that the changes in the iv are the cause of the changes in the dv. Strengths: permits conclusions about causality, an experimenter can rule out other variables by holding them constant. Limitations: difficult and unethical to manipulate some variables, results may not generalize to (cid:271)roader populatio(cid:374), la(cid:271) studies (cid:373)ay (cid:271)e artifi(cid:272)ial, (cid:374)ot like (cid:862)real-(cid:449)orld(cid:863) To evaluate the quality of our findings, we look at the validity. La(cid:271) studies (cid:373)ay (cid:374)ot look like the (cid:862)real-(cid:449)orld(cid:863) Mundane realism: is the extent to which an experiment is similar to real life situations. Psychological realism: the extent to which the psychological processes triggered in an.