Volumes were acquired continuously with a repetition time (TR) of 3 s; 117 volumes were collected in each single scanning run (5:51 minutes; 4 scanning runs in total).
Subjects had to complete eight scanning runs with 210 volumes per run.
Participants performed four scanning runs each of the Emotion and Neutral conditions of the AX-CPT (eight runs in total).
Recording was performed using a single scanning run at 512×512 pixel resolution with a scanning speed of typically 166 lines per second.
Four null volumes were included in each scanning run to allow the scanner to ensure equilibrium of longitudinal magnetization, and were discarded prior to analysis.
During the first functional scanning run, subjects performed a simple Vigilance Task.
The first 5 volumes of each scanning run were discarded to allow for T1 equilibration effects.
Thirty stimuli were presented across 2 scanning runs via electrostatic headphones (MR confon GmbH, Magdeburg, Germany).
There were three such sweeps in each scanning run (or quarter) and four runs, so in total 12 learning sweeps.
In the subsequent 3 scanning runs, participants performed alternating blocks of the Fact-Learning thek and the Riser Detection Task.
