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Table 2 Results of logistic regression analysis of predatory responses of female Latrodectus hesperus to playbacks of low- or high-amplitude vibrations of house fly prey and conspecific males

From: A meal or a male: the ‘whispers’ of black widow males do not trigger a predatory response in females

Model - LogLikelihood DF χ2 p
Difference 9.381 3 18.762 0.0003
Full 32.959    
Reduced 42.340    
R2 (U) 0.222    
Predictor β SE β χ 2 p Odds ratio
Constant - 0.713 0.325 4.82 0.028 N/A
Amplitude 1.233 0.325 14.41 0.0001 1.308
Waveform - 0.134 0.325 0.17 0.679 0.085
Amplitude*Waveform - 0.134 0.325 0.17 0.679 N/A
  1. (The levels of the factors amplitude and waveform were coded as follows: low = 0, high = 1; male = 0, prey = 1).