marginally non-significantP = 0.071
The latter interaction was due to two marginally non-significant ( P = 0.071–0.072) effects: a decrease in the probability of zygodactyly for small object sizes relative to large when grasping fish compared to the “other substrate” reference condition of perching, and an increase in the probability of zygodactyly for medium object sizes relative to large, when perched in trees compared to “other substrates.” However, because these parameters were not significant, we felt justified in excluding the object size × contact condition within grasping scenario interaction effect in subsequent analyses (below).