A group of educational researchers would like to test the effectiveness of educa

Question

A group of educational researchers would like to test the effectiveness of educational toys geared to help children read. Researchers designed an experiment in which a group of preschool aged children spent 2 hours a day for 6 months in a classroom that had "educational" toys including alphabet blocks, electronic reading games, etc. Where as a control group of children spent 2 hours a day for 6 months in a classroom with "non-educational" toys. To minimize bias the researchers used 5 sets of identical twins. Each set of twins had a twin randomly assigned to either the experimental classroom or control classroom. The researchers than recorded the ages in months when the child began to read at the primary level. The results are as follows: What type of experimental design did the educational researchers use in their study? Matched Pairs Design Completely Randomized Design Simple Random Sampling Stratified Random Sampling

Explanation / Answer

16.

In this case the ability of twins is assumed to be identical and hence they serve as identical units. Thus this is the case of a Matched Pairs Design.

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