The reliability of eyetracking to assess attentional bias to threatening words in healthy individuals |
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Authors: | Ian W Skinner Markus Hübscher G Lorimer Moseley Hopin Lee Adrian C Traeger Sylvia M Gustin James H McAuley |
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Institution: | 1.Neuroscience Research Australia,Randwick,Australia;2.Prince of Wales Clinical School,University of New South Wales,Sydney,Australia;3.Sansom Institute for Health Research,University of South Australia,Adelaide,Australia;4.School of Physiotherapy,University of Notre Dame Australia,Fremantle,Australia;5.School of Psychology,University of New South Wales,Sydney,Australia;6.School of Medicine and Public Health,University of Newcastle,Newcastle,Australia;7.Centre for Rehabilitation Research, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences,University of Oxford,Oxford,UK;8.Sydney Medical School,University of Sydney,Sydney,Australia |
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Abstract: | Eyetracking is commonly used to investigate attentional bias. Although some studies have investigated the internal consistency of eyetracking, data are scarce on the test–retest reliability and agreement of eyetracking to investigate attentional bias. This study reports the test–retest reliability, measurement error, and internal consistency of 12 commonly used outcome measures thought to reflect the different components of attentional bias: overall attention, early attention, and late attention. Healthy participants completed a preferential-looking eyetracking task that involved the presentation of threatening (sensory words, general threat words, and affective words) and nonthreatening words. We used intraclass correlation coefficients (ICCs) to measure test–retest reliability (ICC > .70 indicates adequate reliability). The ICCs(2, 1) ranged from –.31 to .71. Reliability varied according to the outcome measure and threat word category. Sensory words had a lower mean ICC (.08) than either affective words (.32) or general threat words (.29). A longer exposure time was associated with higher test–retest reliability. All of the outcome measures, except second-run dwell time, demonstrated low measurement error (<6%). Most of the outcome measures reported high internal consistency (α > .93). Recommendations are discussed for improving the reliability of eyetracking tasks in future research. |
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