A principal component analysis of these results for all participants yielded three components, one associated with facial identity tasks, one with non-face object recognition tasks and one with facial expressions tasks.
In study 2 (experimental design), attitude accessibility was manipulated with a repeated attitude expression task.
In the present study, a double-blind placebo-controlled crossover design was used in a dynamic facial expression task, in order to assess the effects of administration of oxytocin on emotion recognition.
The Expression task × in-scanner performance effects on activation were found in the cerebellum.
At the beginning of each task, a 10 s instruction cue informed participants of the relevant dimension to attend to ("Identity task," "Expression task," or "Gaze task").
A similar trend was seen in the Expression task in comparison to the Gaze task [ t(47) = 1.94, p = 0.058].
We used these particular contrasts [for the Identity task for example, the beta weights were [Identity task 2 − (Expression task 1 + Gaze task 1)]] to differentiate the 3 tasks from each other.
In a first step, we contrasted the 3 face tasks with each other (e.g. Identity task minus Expression task and Gaze task) across the entire group, to assess task-specific activation at the whole-brain level.
Subjects were faster to respond during the gender task than during the expression task (anova of correct trials: F1,7 = 23.6, P = 0.001).
At the beginning of each task, a short message (10 s) informed the participants of the relevant dimension to attend to (e.g., "Identity task," "Expression task," "Gaze task").
