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Choosing an Appropriate Study Design 84 This design is used when the study wants to know the change in characteristics (e.g. knowledge, attitude, practices) of the study population (students, nurses, managers, clients, etc) in a given area. A survey bservation, or testing is conducted before an intervention is introduced (O') After a period of time the survey, observation or testing is repeated (O) and the results of the pretcst (before) and the posttest (after) are compared to determine change/s For example, if a rescarcher wants to know if an information campaign against drug/substance abuse in a certain city has reduced drug use in the area after the campaign, a survey before and after the campaign can be conducted No "control" area (area where no campaign is conducted), however, is surveyed. With the absence of a control area, this design cannot be considered an experimental design. Any reduction in drug use overtime, cannot be solely/conclusively attributed to the intervention (campaign) Static Group Comparison Timc Experimental Group X Control Group o2 In the static group design, there are two groups involved, an experimental group and a control group. The experimental group receives or is exposed to the intervention/treatment (X). This is followed by a meas (O , the result of which is compared to the result of the measurement/observation from a control group (O2) that di intervention. The random process, however, was not used in the assignmert
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  • Fall '18
  • alfredo
  • Experimental Group, static group design

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