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Control Group Design




Please respond to the following questions either by writing the design name or by describing the design using standard notation (X = program, O=observation, R= random assignment). For each design, please discuss all threats to internal validity.;1. a. Design: Single group post-test only;b. Internal validity threats;2. a. Design: (R) O1 X O2;(R) O1 O2;b. Internal validity threats;3. a. Design: Pretest-posttest design with experimental and comparison group;b. Internal validity threats;4. a. Design: O X O;b. Internal validity threats;5. a. Design: Single group with three pretests and four posttests;b. Internal validity threats


Paper#68643 | Written in 18-Jul-2015

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