PSYB01H3 Lecture Notes - Canon Eos 60D, Latin Square, Observational Error
Document Summary
Experimental method is a vital and versatile tool in the researcher"s toolbox the experimental method controls for extraneous variables. E. g. you want to test hypothesis on crowding on cognitive performance one group put in a crowded room, others in uncrowded room. Confounding variable=> varies along with the iv; confounding occurs when the effects of the iv and an uncontrollable variable are intertwined so that you cannot determine which of the variables is responsible for the observed effect. Planning a basic experiment: the simplest possible experimental design has 2 variables: the independent variable (iv) and dependent variable (dv) Experiments in which there is one iv that has 2 levels: experimental group and control group. Researchers should make sure the only difference b/w the 2 groups is the manipulated variable. Researcher using experimental design must: (1) obtain 2 equivalent groups of participants, (2) introduce the iv, and (3) measure the effect of the iv on the dv.
