PSY 310 Lecture Notes - Lecture 3: Ethnocentrism, Demand Characteristics, Emic And Etic

• School: Stony Brook University
• Department: Psychology
• Course: PSY 310
• Professor: christianluhmann

Document Summary

Operational definitions definitions of var in terms of the operations needed to produce them. Extraneous variables (confounders) have unintended influence on results of an experiment by changing diff between group. More damaging to have in experiment can make it seem as though experiment worked (or didn"t work) when it shouldn"t have worked (or worked) Nuisance var unwanted variables tht can cause variability of scores within all groups to incr. Can only make the experiment look like it won"t work when it should have. Produce groups that are equivalent b4 introducing iv, thereby eliminating ev. Reduce the effects of nv as much as possible. Ev: systematic diff b/w groups (other than iv, change diff b/w groups. Nv: incr variability i entire sample, applies to each of your groups equally. Experience: type of training/learning is manip. Stimulus/environmental: an aspect of environment is manipulated. Participant characteristics: not really an iv, classified (i. e. male, female) but not manipulated: ex post facto study.