KINE 2049 Chapter Notes - Chapter 5: Covariance, Analysis Of Covariance, Dependent And Independent Variables
22 Dec 2016
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A variable is a characteristic (attribute/dimension) that chances under different conditions. In a study, you will have an independent and a dependent variable. Independent and dependent variables are foundation of the research process. Researchers explore the relationships between and among them by selecting, manipulating, and measuring them. The variables that are manipulated by investigator. Central feature of experimental research is identifying a variable then manipulating it (cid:862)cause-and-effe(cid:272)t(cid:863) refers to a(cid:271)ilit(cid:455) to des(cid:272)ri(cid:271)e (cid:272)ha(cid:374)ges i(cid:374) a(cid:374) affe(cid:272)ted (cid:448)aria(cid:271)le when a first variable (the independent variable) is manipulated. Each independent variable has at least 2 levels (so you can compare the changes between them) The variables that are measured in experiment. Formally defines the characteristics of a variable. Within any group there can be several categories. E. g. in one study, menstrual cycle was operationally defined as: premenstrual, 3-5 days before menses; menstrual, days 1-3 of menses; and postmenstrual, 10-12 days after the onset of menses.
