KINE 2049 Chapter Notes - Chapter 5: Observer-Expectancy Effect, Confounding, Dependent And Independent Variables
22 Dec 2016
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Variable that is unintentionally allowed to vary. Confounding variables can negate the results of an experiment by providing alternate explanations for the findings. Researchers must pay special attention to identifying potential confounding variables. One of the most common criticisms of research. Quantifies the variable nature of measurement and is made up of several parts. Primary variance: a. k. a. systemic variance is expected/desired variance in measurement of dependent variable. Is caused party by effect of independent variable: this variance is wanted and consistent. Secondary variance: a. k. a. extraneous variance is consistent but unwanted, e. g. an inaccurately calibrated scale that adds 2 pounds to every weight measurement; (cid:272)onsistent sin(cid:272)e it"s always 2 l(cid:271)s (cid:271)ut you don"t want those extra 2lbs. Inconsistent and unwanted: can account for imprecise measurement but also for certain variability in measurement that is present for unknown/unexplained reason. Researcher must fix independent variables at levels far enough apart that an effect may be observed.
