SOAN 2120 Lecture Notes - Lecture 12: Random Assignment, Internal Validity, The Techniques
10 Nov 2018
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R o1 x. o2: o3 o4, x. o5, o6. Combines elements of both the post-test only and the pretest-posttest control group designs. Know how to make the various connections. Test program" in one community versus other communities as "control groups . Research designs: aside from the absence of random assignment, these designs "look" much like a regular experiment: = what happens is one group is exposed to an event or a condition and then we observe the group. = slight improvement from the one shot case study. = they know x is coming so they have a plan to prepare for x. = get observed before and after x: internal validity threats which confound pretest-posttest comparisons, selection! Static group comparison: o1 = average income for the group who went to uni. Quant because the data we generate is turned into numerical data. Valuable because we can tap into: behaviour, attitudes/beliefs/opinions, sociodemographic characteristics, intentions, classi cation.
