![]() These measurements can also be synchronized with recordings of galvanic skin response, which provides a measure of arousal. The FACS is also graded on a scale of intensity, which gives a measure of how strongly the emotion is displayed. When measuring facial expressions within iMotions, the stimuli are paired automatically to the FACS analysis, allowing you to pinpoint the exact moment that the stimulus triggered a certain emotion. Nose Wrinkler, Lip Corner Depressor, Lower Lip Depressor Inner Brow Raiser, Outer Brow Raiser, Brow Lowerer, Upper Lid Raiser, Lid Tightener, Lip Stretcher, Jaw Dropīrow Lowerer, Upper Lid Raiser, Lid Tightener, Lip Tightener Inner Brow Raiser, Outer Brow Raiser, Upper Lid Raiser, Jaw Drop Inner Brow Raiser, Brow Lowerer, Lip Corner Depressor The gifs on the right are shown in the same order that the action units listed. A complete list of these combinations and the emotion that they relate to is shown below. Emotion recognition is completed in iMotions using Affectiva, which uses the collection of certain action units to provide information about which emotion is being displayed. For example, happiness is calculated from the combination of action unit 6 (cheek raiser) and 12 (lip corner puller). Certain combined movements of these facial muscles pertain to a displayed emotion. ![]() The Action Units described above show the different movements of facial muscles. Sign up now Eye Movement Action Units Action Unit Levator palpebrae superioris Orbicularis oculi, pars palpebralis Relaxation of Levator Palpebrae and Contraction of Orbicularis Oculi, Pars Palpebralis. Relaxation of Levator Palpebrae Superioris Masetter Temporal and Internal Pterygoid relaxed Incisivii labii superioris and Incisivii labii inferiorisĭepressor Labii, Relaxation of Mentalis (AU17), Orbicularis Oris Levator Labii Superioris, Caput infraorbitalis Outer Brow Raiser (unilateral, right side)ĭepressor Glabellae, Depressor Supercilli, Currugator
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