PSYC 2360 Lecture Notes - Lecture 7: Observational Error, Analysis Of Variance, Spurious Relationship

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2360
• Professor: Gonzales

Document Summary

The invesigator manipulates the independent variable or variables by arranging diferent experiences for the research paricipants and the assesses the impact of these diferent experiences on one or more measured dependent variables. Manipulaion: experimenter systemaically alters the levels of a variable. Random assignment: every paricipant has an equal chance of being assigned to any speciic condiion in an experiment. Associaion: when cause is present efect is present, when cause is absent efect is absent. Temporal priority: if event a occurs before event b, then a could be causing b, if event a occurs ater event b, then a cannot be causing b. Control of common-causal variables: eliminate confounds (variables that may produce spurious relaionships) Spurious relaionship: relaionship is not due to the manipulaion: diicult unless true experiment: experimental manipulaion. Covariaion of cause and efect: is measured by comparing treated and untreated groups. Temporal priority: is taken care of because you intervene before you measure outcome.