PSYC 1010 Lecture Notes - Lecture 3: Confounding, Blind Experiment, Central Tendency

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Rebecca Jubis

Document Summary

When using control group with no variable, groups don"t have similar expectations. When using placebo control group, all groups have similar expectations. Lecture 3: how strong the effect of expectation can be. Placebo control group usually used in drug related studies where people might have strong expectations about drug effects. Is a special type of control group that is used to control for subjects expectations that could affect results. Closer to 1, indicates close correlation; closer to 0, indicates weak correlation; 0. 5, indicates close mid relation/moderate: +: the value of both variables are changing in the same direction. : the value of bother variable are changing in opposite direction. Interpret the number (weak vs. strong) and the sign (same vs. opposite: +0. 59: moderate relationship between variables, and corresponding variables (as fatigue increases, test scores are increasing) 3rd variable problem: underlying variable causing both first variables.