Table 1. 1 AICc comparisons of the top candidate models explaining variation in rates of plasticity (λE ) in temperature tolerance among different classes of ectothermic animals. ‘Class’ is taxonomic class, ’Slope’ is the slope of the estimated exponential decay function at the final measurement, ‘Measure’ is the measurement type of thermal tolerance (behaviour vs. mortality), and ‘Mass’ is body mass. Species identity, study and observation are included as random intercepts in all models. ΔAICC = 12.8 and 14.6 for the best model among those not listed for the top and bottom data set, respectively.