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Fig. 3 | Behavioral and Brain Functions

Fig. 3

From: Mothers’ pupillary responses to infant facial expressions

Fig. 3

Single-trial pupil response. Pupil diameter as a function of time is shown from both eyes separately (blue = left, green = right) and from data combined across eyes (red). Valid data frames are indicated by cyan points. Pupil size during invalid data frames were replaced by interpolation in the pupil size combined across eyes (red). The first 2 s of each trial displayed a random visual pattern followed by a face stimulus (2–7 s). Pupil dilation was extracted as the mean pupil size during the time-window ranging from 4000 to 5000 ms after face onset (6000–7000 ms after trial onset, yellow background). Pupil constriction was extracted as the minimum pupil size from time window spanning 300–1200 ms after face onset (blue background). A baseline for pupil size was calculated from −300 to 0 ms relative to face onset (gray background)

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