Psychology 1000 Lecture Notes - Lecture 5: Neuroglia, Monster Study, Myelin

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Ronald R Holden

Document Summary

An experiment may have more than one iv and/or more dv. Multiple ivs allow to measure interactions: interactions : how much one iv affects dv depends on the second iv, low traffic density & cellphone use affects breaking reaction time. Allow us to determine whether differences between groups of levels of the independent variables are real" and big enough" differences. Validity : how well an experiment actually tests what it is supposed to test: internal validity. Degree to which the experiment supports clear causal conclusions. If the experiment is designed carefully, then we have high internal validity: external validity. Degree to which the results can be generalized to other populations, settings, and conditions: confounding variables. Variables that are intertwined with the independent variable. Placebo : substance that has no pharmacological effect. Participants don"t know which group they are in. Placebo effect : people"s health of both groups improves, then the improvement had no effect, but people expected to.