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Purpose of Evaluation Research:
- To scientifically determine the impact of a specific program, intervention, new method, or social policy.
- Form of Applied vs. Theoretical Research
Issues of Measurement (Evaluation Research):
1. Outcomes Measures
2. Experimental Context
3. Specifying Interventions
4. Specifying the Population
5. Operationalizing Success vs. Failure
Outcome Measures:
- Must be able to reliably and validly measure your outcome variable(s).
Experimental Context:
- Must measure aspects of the context on an experiment that possibly may affect the outcome variable.
Specifying Interventions:
- Need to accurately measure the program intervention or the experimental stimulus.
Specifying the Population:
- Must define the population of possible subjects for whom the program is appropriate.
- Also, need to control for other variables such as age, race, etc.
Operationalizing Success vs. Failure:
- Defining Success vs. Failure.
- Measuring success and Failure is NOT clear cut.
- Often, it comes down to Cost-Benefit Analysis.
Types of Evaluation Research Designs:
1. Experimental Designs
2. Quasi-Experimental Designs
3. Qualitative Evaluations
Experimental Designs:
- Randomly assign subject to Control and Experimental Groups, then measure before/after the experimental effect in both groups.
- Deals with all the potential problems of Internal Validity.
2 Quasi-Experimental Designs:
1. Time-Series Designs: Involves measurements taken over time with an intervention during the time series.
2. Multiple Time-Series Designs: Measurement of variable(s) over time in different locations or among different groups, ones which received the experimental stimulus (or program) and which did not
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