Ies [FIGS]; Maxwell, 1992). Testing Session Procedures Before testing, participants abstained for >3 hr from caffeine and/or smoking/nicotine, as well as from alcohol/drugs (apart from contraceptives and medication required for a stabilized physical situation) beginning at midnight. Upon arrival to the laboratory, subjective mood evaluations had been carried out. Concurrently, electrodes have been applied, just after which the experiment commenced. This study was authorized by the Royal Ottawa Overall health Care Group along with the University of Ottawa Social Sciences and Humanities Investigation Ethics Boards and informed consent was obtained from all participants. Participants wereJ Impact Disord. BAY60-4552 web Author manuscript; available in PMC 2013 February 1.Jaworska et al.Pagecompensated 30.00 CDN/session (sufferers participated in various sessions as part of a larger 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 using a Likert scale on 65 mood adjectives, from which values had been aggregated to type 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 activity was adapted from Krolak-Salmon et al. (2001). Thirty-six photographic faces displaying among four expressions (sadness [sad], joy, surprise [sur], neutral) had been presented individually on a screen in front on the seated participant ( 1 m) within a dim, electrically-shielded and sound-attenuated area. Every single emotion was expressed at three intensities (20 , 50 , one hundred ) by one actor. Two males and two females displayed 1 emotion at all intensities (i.e., 16 actors). Expressions at 20 intensity have been viewed as “neutral” as they’re not reliably distinguished (Orgeta Phillips, 2008) and 0 expressions are more likely to be confused with negative than with other facial expressions (Palermo Coltheart, 2004). Photographs had been digitized and converted to grey-scale images, matched for luminance and contrast, together with the neck and hair cropped out (Figure 1). Each 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 Application, Neurobehavioral Systems, Albany, CA, USA). Participants pressed a button to shocked faces (sur50, sur100) to ensure that they paid attention to expressions. Hits ( correct responses to sur50 sur100), false alarms (FA; responses to non-surprised faces) and reaction times (RT) had been recorded. Facial Expression Rating Questionnaire Just after the process, participants rated 10 faces (one male and one female expressing each and every of joy50, joy100, sad50, sad100 and neutral) presented during the task. Faces had been rated employing a Likert scale from 0 (not at all) to 10 (extremely much) on two valence inquiries: how 1) “sad” and 2) “happy” does the face appear. Participants rated the faces depending on their gut reaction, taking 2? min to price all faces. Two questionnaire versions, containing various faces but bearing the exact same expressions, were administered. No variations existed between the versions, therefore, ratings were averaged across the questionnaires. Electrophysiological Recordings PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21228935/ Information Reduction EEG activity was recorded (500 Hz) making use of a cap embedded.
