PY 211 Study Guide - Midterm Guide: Statistical Hypothesis Testing, Dependent And Independent Variables, Mean Absolute Difference
3 Apr 2018
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A hypothesis test for related samples (samples that are not independent) Related samples: participants are either observed in more than one treatment or matched on common characteristics. Two types of research designs for related samples: repeated-measures design, matched pairs design. You can use a pre-post design or a within-subject design. Measure the dependent variable before and after treatment. Observe participants across many treatments but doesn"t have to be before or after a treatment. Participants are selected and then matched based on natural or experimental common characteristics or traits. Can only observe two groups with matched participants. Matching based on experimental manipulation often tests the effect of the traits. Requires the trait/characteristic to be measured before matching the pairs. Matching based on natural occurrence matches participants based on preexisting traits, no need to measure traits as with previous. Variance is unknown for one or both populations.
