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A Method of Matching Groups for Experiment with No Loss of Population
In all good controlled experimentation parallel groups are matched so as to secure equal prospect of progress for the matched groups apart from the differential effect of the experimental factor, soExpand
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Statistical Procedures and Their Mathematical Bases.
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The correlation ratio.
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An Example of Replication of an Experiment for Increased Reliability
In this article findings will be presented from a set of massed ex periments involving seventeen pairs of matched groups, 104 measured group contrasts, all centered on the same hypothesis.1 TheExpand
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Foundations of educational psychology
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Improving Functioning Intelligence by Analytical Training in a Nursery School
T LE contradictory evidence from studies of the question whether attendance of a child at a nursery school improves his intelligence quotient" suggests that the issue is not so much mere attendanceExpand
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