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Chastain, Garvin; And Others – 1982
Levels of independent variable(s) are often mixed within each block of trials rather than each level being presented in a separate block in research of various types. Two experiments involving tasks of a visual nature were conducted to demonstrate that such mixing can easily obscure the effects of principal interest. A target circle was projected…
Descriptors: Analysis of Variance, Difficulty Level, Predictor Variables, Research Design
