However, because the chi-square test based on likelihood ratios is anti-conservative and the rule-of-thumb is to halve the p -values (Pinheiro and Bates, 2000 ), this improvement can only be considered marginally significant; the variable Age marginally improves the model, but not significantly ( χ ( 7 ) 2 = 12.99, p = 0.072) however Gender ( χ ( 7 ) 2 = 11.81, p = 0.107) does not significantly add to the overall prediction of the model.
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A Complex Story: Universal Preference vs. Individual Differences Shaping Aesthetic Response to Fractals Patterns.
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