Barely Significant

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highly significantp<0.0010.0× alphaqualifiedgold
In contrast, species differences in the proportion of aphids that fell from the host plant as a result of chill coma were highly significant (χ 2 2 = 20.80 p<0.001), with significantly more M. dirhodum falling from the plant as a result of chill coma, and significantly less R. padi than expected (relative proportions for M. dirhodum , R. padi and S. avenae are 0.45, 0.02 and 0.21 respectively).
highly significantp < 0.0010.0× alphaqualifiedgold
Crucially, however, when adding the dummy variable (with D = 1 if the observation was a response to a non-symbolic stimulus, and D = 0 if it was a response to a symbolic stimulus) the weight of the dummy x logarithmic interaction was highly significant ( B D x log = 0.029, st. error = 0.006, t ratio = 4.727, df = 22, p < 0.001), confirming that significant differences in logarithmic compression do exist between fast responses to non-symbolic and symbolic stimuli.