Ies [FIGS]; Maxwell, 1992). Testing Session Procedures Prior to testing, participants abstained for >3 hr from caffeine and/or smoking/nicotine, as well as from alcohol/drugs (besides contraceptives and medication needed for any stabilized physical situation) beginning at midnight. Upon arrival for the laboratory, subjective mood evaluations were carried out. Concurrently, electrodes were applied, after which the experiment commenced. This study was authorized by the Royal Ottawa Health Care Group and also the University of Ottawa Social Sciences and Humanities Research Ethics Licochalcone A Boards and informed consent was obtained from all participants. Participants wereJ Have an effect on Disord. Author manuscript; offered in PMC 2013 February 1.Jaworska et al.Pagecompensated 30.00 CDN/session (sufferers participated in several sessions as a part of a bigger study).NIH-PA Author Manuscript NIH-PA Author Manuscript NIH-PA Author ManuscriptSubjective Mood Questionnaires Mood was assessed with all the Profile of Mood States (POMS; McNair et al., 1992) on which participants rated their subjective state applying a Likert scale on 65 mood adjectives, from which values were aggregated to type seven mood dimensions (tension-anxiety, depressiondejection, anger-hostility, vigor-activity, fatigue-inertia, confusion-bewilderment and total mood disturbance). Emotional Faces Recognition Process The faces recognition activity was adapted from Krolak-Salmon et al. (2001). Thirty-six photographic faces displaying among four expressions (sadness [sad], joy, surprise [sur], neutral) were presented individually on a screen in front with the seated participant ( 1 m) within a dim, electrically-shielded and sound-attenuated space. Every single emotion was expressed at 3 intensities (20 , 50 , 100 ) by one particular actor. Two males and two females displayed 1 emotion at all intensities (i.e., 16 actors). Expressions at 20 intensity had been regarded “neutral” as they’re not reliably distinguished (Orgeta Phillips, 2008) and 0 expressions are additional likely to be confused with unfavorable than with other facial expressions (Palermo Coltheart, 2004). Photographs were digitized and converted to grey-scale images, matched for luminance and contrast, with the neck and hair cropped out (Figure 1). Each and every expression (neutral, sad50, sad100, joy50, joy100, sur50, sur100) was pseudorandomly presented 80 occasions (no identical faces presented back-to-back) for 400 ms (ISI: 1500 ms; Presentation Computer software, Neurobehavioral Systems, Albany, CA, USA). Participants pressed a button to shocked faces (sur50, sur100) to make sure that they paid interest to expressions. Hits ( correct responses to sur50 sur100), false alarms (FA; responses to non-surprised faces) and reaction instances (RT) had been recorded. Facial Expression Rating Questionnaire Soon after the process, participants rated 10 faces (a single male and one particular female expressing every single of joy50, joy100, sad50, sad100 and neutral) presented in the course of the activity. Faces were rated utilizing a Likert scale from 0 (not at all) to ten (pretty much) on two valence queries: how 1) “sad” and 2) “happy” does the face appear. Participants rated the faces based on their gut reaction, taking 2? min to price all faces. Two questionnaire versions, containing distinct faces but bearing precisely the same expressions, had been administered. No variations existed among the versions, thus, ratings have been averaged across the questionnaires. Electrophysiological Recordings PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21228935/ Information Reduction EEG activity was recorded (500 Hz) using a cap embedded.
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