Effects of Comparison to a Random Sample from the General Population
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چکیده
a. Experimental designs are characterized by the use of randomized assignment to research groups to control for the effects of influences, other than the program’s, that would confound one’s understanding of the program effects. Practical and ethical problems with the use of experimental designs in the evaluation of the effectiveness of programs with human subjects. i. It isn’t always possible to randomly assign subjects to research groups because individuals ultimately can decide whether they want to participate or not. ii. In many instances it may not be fair to randomly allocate subjects to research groups without consideration of the individuals interests and needs.
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