S gave informed consent. Data from one participant was excluded because

The word "happy" or "sad" was http://www.tongji.org/members/rifledock1/activity/235547/ displayed above the face to http://www.tongji.org/members/rifledock1/activity/270345/ indicate the individual's existing emotional state. sad) or food selection (i.e., meat vs. vegetables). These trials have been regarded the ``Preference trials, where participants had to rely on information about each person's preference and emotional state to form expectations about their decision. Rick had no unique preference and could choose to eat either meat or vegetables when he was delighted (``H3) or sad (``S3). The description of Rick study, ``This is Rick. He doesn't have a strong preference for either variety of food. When he's delighted, he some occasions chooses to consume meat and he some times chooses to consume vegetables.S gave informed consent. Information from one particular participant was excluded because the timing files had been corrupted, and from a different participant because of excessive artifacts inside the data. Thus, results from nineteen participants are reported.Stimuli and DesignStimuli consisted of colored photos of three male faces with neutral expressions, obtained from the NimStim database (Tottenham et al., 2009), in conjunction with 36 colored photos of meat dishes and 36 colored pictures of vegetable dishes obtained in the World wide web. Stimuli had been presented with employing Psychtoolbox three.0.eight (Brainard, 1997; Pelli, 1997) in MATLAB 7.8 (The MathWorks, Inc., Natick, MA, USA). The stimuli were presented employing an event-related style. In every single trial, among the 3 faces was presented in addition to a text cue above the face indicating the person's emotional state (``happy or ``sad), and images of a meat dish as well as a vegetable dish on the left and ideal of the face (Figure 1). Every single trial was presented for 2 s and trials were separated by a 4?0 s jittered fixation interval. Every run consisted of six trials per condition (i.e., each face paired with every single emotion) to give a total of 36 trials per run, and also a run duration of 5 min. The system ``optseq21 was utilized to generate the optimal sequence and separation of trials for maximal statistical efficiency of rapid-presentation event-related hemodynamic response estimation for every run (Dale, 1999). The position from the meat and vegetable dishes1 http://surfer.nmr.mgh.harvard.edu/optseqFrontiers in Human Neuroscience | www.frontiersin.orgSeptember 2015 | Volume 9 | ArticleLee and McCarthyNeural discrimination of contextual informationFIGURE 1 | Schematic illustration with the experimental paradigm. Throughout every single trial, the neutral face image of one of many three white male folks was displayed. As the NimStim faces utilized can't be published, sample faces generated with FaceGen (Singular Inversions, Toronto, ON, Canada) are shown right here rather. Photos of a meat dish and a vegetable dish have been presented on the left and suitable of the face. The word "happy" or "sad" was displayed above the face to indicate the individual's present emotional state. Participant's process was to indicate, utilizing the left and right button presses, which dish the individual would decide on according to the individual's emotional state. Trials had been presented for 2 s and had been separated by a four?0 s jittered interval through which a fixation cross was displayed (not shown).