Between and Within Subjects Research Designs 2.24

Between and Within Subjects Research Designs 2.24 - Click...

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Unformatted text preview: Click to edit Master subtitle style Between and Within Subjects Research Designs Research Methods PSYC E226 2/24/2010 Learning Objectives  Know what between-subject and within- subject design are  Identify strengths and weaknesses of between subject design  Be familiar with how individual differences can affect between subjects design  Identify major threats to the validity of within- subjects design Between and within designs  Between-Subjects design: Obtaining scores from two groups, each representing one level of the independent variable Group one does a memory task with one-syllable words; Group two does a memory task with five- syllable words Non-experimental Design is a type of this  Within-Subjects design: Obtaining scores Between-subject design  In this design, each group represents one level of the independent variable. 1. IV is manipulated between groups to create different treatment levels 2. The dependent variable is then measured for each person in each group 3. The results of the groups are compared, with the hypothesis that there is a difference Between-subject design  The researcher may have several levels of the variable, with one group experiencing each Children complete a tooth brushing course, a tooth brushing + general hygiene course, or a hygiene only course, then are tested on frequency of tooth brushing  This design can also be used for observational data: groups are established based on already existing characteristics Benefits of...
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Between and Within Subjects Research Designs 2.24 - Click...

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