Ies [FIGS]; Maxwell, 1992). Testing Session Procedures Before testing, participants abstained for >3 hr from

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 (apart from contraceptives and medication essential for any stabilized physical condition) starting at midnight. Upon arrival to the laboratory, subjective mood evaluations were carried out. Concurrently, electrodes were applied, following which the experiment commenced. This study was approved by the Royal MedChemExpress Acriflavine Ottawa Wellness Care Group and the University of Ottawa Social Sciences and Humanities Research Ethics Boards and informed consent was obtained from all participants. Participants wereJ Affect Disord. Author manuscript; obtainable in PMC 2013 February 1.Jaworska et al.Pagecompensated 30.00 CDN/session (patients participated in various 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 utilizing a Likert scale on 65 mood adjectives, from which values were aggregated to kind seven mood dimensions (tension-anxiety, depressiondejection, anger-hostility, vigor-activity, fatigue-inertia, confusion-bewilderment and total mood disturbance). Emotional Faces Recognition Activity The faces recognition process was adapted from Krolak-Salmon et al. (2001). Thirty-six photographic faces displaying among 4 expressions (sadness [sad], joy, surprise [sur], neutral) have been presented individually on a screen in front on the seated participant ( 1 m) inside a dim, electrically-shielded and sound-attenuated space. Each emotion was expressed at three intensities (20 , 50 , 100 ) by a single actor. Two males and two females displayed one particular emotion at all intensities (i.e., 16 actors). Expressions at 20 intensity have been regarded “neutral” as they are not reliably distinguished (Orgeta Phillips, 2008) and 0 expressions are a lot more likely to become confused with damaging than with other facial expressions (Palermo Coltheart, 2004). Photographs have been digitized and converted to grey-scale images, matched for luminance and contrast, with all the neck and hair cropped out (Figure 1). Each and every 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 Software, Neurobehavioral Systems, Albany, CA, USA). Participants pressed a button to shocked faces (sur50, sur100) to make sure that they paid focus to expressions. Hits ( right responses to sur50 sur100), false alarms (FA; responses to non-surprised faces) and reaction instances (RT) were recorded. Facial Expression Rating Questionnaire Following the process, participants rated 10 faces (one particular male and a single female expressing each and every of joy50, joy100, sad50, sad100 and neutral) presented during the activity. Faces have been rated working with a Likert scale from 0 (not at all) to 10 (pretty significantly) on two valence inquiries: how 1) “sad” and 2) “happy” does the face look. Participants rated the faces based on their gut reaction, taking 2? min to price all faces. Two questionnaire versions, containing distinctive faces but bearing exactly the same expressions, were administered. No differences existed amongst the versions, hence, ratings were averaged across the questionnaires. Electrophysiological Recordings PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21228935/ Data Reduction EEG activity was recorded (500 Hz) applying a cap embedded.