1. A researcher wants to evaluate a new treatment for obsessive-compulsive disorder. Describe how she might evaluate the effectiveness of the treatment using a quasi-experiment. Explain how she could...

1. A researcher wants to evaluate a new treatment for obsessive-compulsive disorder. Describe how she might evaluate the effectiveness of the treatment using a quasi-experiment. Explain how she could change the study you describe into an experiment.

2. A researcher wants to evaluate the effect of a new set of teaching standards on 5th grade math scores. Explain how each of the sources of bias listed below could affect his results:

·         testing effects

·         history effects

·         maturation attrition