Presentation is loading. Please wait.

Presentation is loading. Please wait.

Hybrid Experimental Designs. Hybrid Designs l Variations on randomized designs l Help to address specific threats l Incorporates different design features.

Similar presentations


Presentation on theme: "Hybrid Experimental Designs. Hybrid Designs l Variations on randomized designs l Help to address specific threats l Incorporates different design features."— Presentation transcript:

1 Hybrid Experimental Designs

2 Hybrid Designs l Variations on randomized designs l Help to address specific threats l Incorporates different design features Two will be illustrated here.

3 The Solomon Four-Group Design l Explicitly addresses a testing threat l Assesses the effect of taking a pretest ROXOROORXOROROXOROORXORO

4 Possible Outcomes Treatment Effect -- No Testing Effect

5 Possible Outcomes Treatment Effect and Testing Effect

6 Switching Replications Design l Switching: the groups switch roles over the course of the study. l Replications: the treatment is repeated or replicated. ROXOOROOXOROXOOROOXO

7 Possible Outcomes Short-term Persistent Treatment Effect

8 Possible Outcomes Long-term Continuing Treatment Effect

9 Switching Replications l Very strong in internal validity l Looks at short and longer term effects l Strong ethically because all participants get the treatment l Works well with some institutional structures (for example, semester system in schools)


Download ppt "Hybrid Experimental Designs. Hybrid Designs l Variations on randomized designs l Help to address specific threats l Incorporates different design features."

Similar presentations


Ads by Google