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Unformatted text preview: C. Multiple time series design 1. O1 O2 O3 O4 X O5 O6 O7 O8 (group1) 2. O1 O2 O3 O4 O5 O6 O7 O8 (group 2) 3. Improves “non-equiv control group” design a. Example: Media Literacy Program Media Literacy Scores X A B 1 2 3 4 5 6 7 8 observations b. Variation: give comparison group treatment and keep measuring. Example Study RQ: What are the effects of listening to music (while studying) on learning? IV? DV? Possible experiment: X (music) O1 (test score) group 1 R (no music) O1 (test score) group 2 Type of design? True experiment (you can make a causal claim) What can you conclude? If you find that group one on average score is significantly higher than group 2, you can conclude that music helps. High internal validity but low external validity. Now, what if we want to test for effects of another IV? I. Factorial Design A. Purpose: 1. To examine the effects of two or more IVs simultaneously B. Factors (IVs) 1....
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- Spring '10
- external validity, internal validity, Ecological validity