Fig. 2
From: Could prenatal sound discrimination predict vocal complexity later in life?
The frequency of dishabituation response patterns in Superb Fairy-wren eggs exposed to incubation calls of a novel female following exposure to repeated calls of the same female. The data are calculated as the difference in average HR during D minus H3 and are shown per egg age (day 11, 12, 13 of incubation). We scored HR from the digital heart rate monitor during experimental trials. A larger negative HR value was interpreted as a stronger dishabituation response (sound discrimination score)