CRCJ 3001 Lecture Notes - Lecture 5: Dependent And Independent Variables, Confounding, Repeated Measures Design

• School: Carleton University
• Department: Criminology and Criminal Justice
• Course: CRCJ 3001
• Professor: Donna Mailloux

Document Summary

E(cid:454)peri(cid:373)e(cid:374)tal resear(cid:272)h strateg(cid:455) : cause and effect relationships, elements of an experiment, dealing w/ extraneous variables, control groups, manipulation checks. Experiment specific criteria cause and effect. Cause and effect relationships causation and the third-variable problem. Changes in one variable are directly responsible for changes in a second variable. Extraneous variable: factors or variables that are constantly changing and taking on different values in the experiment. An extraneous variable becomes a confound (cid:449)he(cid:374) . It influences the dv do(cid:374)"t take steps to (cid:272)o(cid:374)trol (cid:448)aria(cid:271)les that are u(cid:374)related: varies systematically with the iv do(cid:374)"t (cid:272)o(cid:374)trol (cid:448)aria(cid:271)les that (cid:272)ha(cid:374)ge ra(cid:374)do(cid:373)l(cid:455) Identifying e(cid:454)tra(cid:374)eous (cid:448)aria(cid:271)les (cid:271)ased pri(cid:373)aril(cid:455) o(cid:374) : common sense, simple logical reasoning, past experience, past research. Iq, date of birth: use restricted range (e. g. between 18 and 21, *limits external validity/generalizability, matching values across the treatment conditions, balanced across conditions (e. g. gender, average value the same for all treatments, matching rooms across conditions, disadva(cid:374)tage .