Ies [FIGS]; Maxwell, 1992). Testing Session Procedures Before testing, participants abstained for >3 hr from caffeine and/or smoking/nicotine, also as from alcohol/drugs (other than contraceptives and medication essential for a stabilized physical condition) starting at midnight. Upon arrival to the laboratory, subjective mood evaluations had been carried out. Concurrently, electrodes were applied, right after which the experiment commenced. This study was authorized by the Royal Ottawa Well being Care Group as well as the University of Ottawa Social Sciences and Humanities Study Ethics Boards and informed consent was obtained from all participants. Participants wereJ Influence Disord. Author manuscript; readily available in PMC 2013 February 1.Jaworska et al.Pagecompensated 30.00 CDN/session (patients participated in a number of sessions as part of a bigger study).NIH-PA Author Manuscript NIH-PA Author Manuscript NIH-PA Author ManuscriptSubjective Mood Questionnaires Mood was assessed together with the Profile of Mood States (POMS; McNair et al., 1992) on which participants rated their subjective state using a Likert scale on 65 mood adjectives, from which values had been aggregated to kind seven mood dimensions (tension-anxiety, depressiondejection, anger-hostility, vigor-activity, fatigue-inertia, confusion-bewilderment and total mood disturbance). Emotional Faces Recognition Task The faces recognition process was adapted from Krolak-Salmon et al. (2001). Thirty-six photographic faces displaying one of four expressions (sadness [sad], joy, surprise [sur], neutral) had been presented individually on a screen in front of your seated participant ( 1 m) within a dim, electrically-shielded and sound-attenuated space. Each emotion was expressed at three intensities (20 , 50 , 100 ) by one actor. Two males and two females displayed a single emotion at all intensities (i.e., 16 actors). Expressions at 20 intensity have been thought of “neutral” as they may be not reliably distinguished (Orgeta Phillips, 2008) and 0 expressions are extra most likely to be confused with damaging than with other facial expressions (Palermo Coltheart, 2004). Photographs were digitized and converted to grey-scale pictures, Ro 67-7476 chemical information matched for luminance and contrast, using the neck and hair cropped out (Figure 1). Every single expression (neutral, sad50, sad100, joy50, joy100, sur50, sur100) was pseudorandomly presented 80 instances (no identical faces presented back-to-back) for 400 ms (ISI: 1500 ms; Presentation Application, Neurobehavioral Systems, Albany, CA, USA). Participants pressed a button to shocked faces (sur50, sur100) to ensure that they paid interest to expressions. Hits ( right responses to sur50 sur100), false alarms (FA; responses to non-surprised faces) and reaction times (RT) have been recorded. Facial Expression Rating Questionnaire Immediately after the task, participants rated ten faces (one particular male and one female expressing every single of joy50, joy100, sad50, sad100 and neutral) presented for the duration of the process. Faces had been rated making use of a Likert scale from 0 (not at all) to ten (very a lot) on two valence inquiries: how 1) “sad” and 2) “happy” does the face appear. Participants rated the faces according to their gut reaction, taking two? min to rate all faces. Two questionnaire versions, containing diverse faces but bearing the exact same expressions, have been administered. No differences existed amongst the versions, thus, ratings have been averaged across the questionnaires. Electrophysiological Recordings PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21228935/ Data Reduction EEG activity was recorded (500 Hz) utilizing a cap embedded.
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