[NSG3301] - Final Exam Guide - Everything you need to know! (26 pages long)

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Study begins with dependent variable and looks backward for cause or influence. Study begins with independent variable and looks forward for the effect. Researcher does something to the independent variable to see the effect on dependent variable. Example: study on effect of nutrition on the brain thus gives subjects of one group healthy food to see its effect on the brain. The other group of su(cid:271)je(cid:272)ts does(cid:374)"t re(cid:272)eive the healthy food to (cid:272)o(cid:373)pare the effe(cid:272)ts. (cid:272)o(cid:374)trol group is the (cid:374)a(cid:373)e of the group that does(cid:374)"t re(cid:272)eive the healthy food i(cid:374) the above example and experimental group is the one who receives the treatment (healthy food to see effect on brain). Anyone in the population has a chance to get picked. An increase in sample size will make the sample more homogeneous. The most basic experimental design involves randomizing subjects to different groups and subsequently measuring the dependent variable.

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