K.R. Scherer

Publications (4)5.89 Total impact

• Source

  Available from: unige.ch

  Article: Thermal Analysis of Facial Muscles Contractions

  S. Jarlier, D. Grandjean, S. Delplanque, K. N'Diaye, I. Cayeux, M.I. Velazco, D. Sander, P. Vuilleumier, K.R. Scherer
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  ABSTRACT: Facial expressions can be systematically coded using the Facial Action Coding System (FACS) that describes the specific action unit (AU) or combination of AUs elicited during different kinds of expressions. This study investigated the thermal patterns concomitant to specific action units performance. As thermal imaging can track dynamic patterns in facial temperature at any distance (>; 0.4 m), with high temporal (<; 20 m) and thermal (<; 20 mK@300 K) resolutions, this noninvasive technique was tested as a method to assess fluctuations of facial heat patterns induced by facial muscles contractions. Four FACS-trained coders produced nine different AUs or combination of AUs at various speeds and intensities. Using a spatial pattern approach based on PCA decomposition of the thermal signal, we showed that thermal fluctuations are specific to the activated AUs and are sensitive to the kinetics and intensities of AU production. These results open new avenues for studying patterns of facial muscle activity related to emotion or other cognitively induced activities, in a noninvasive manner, avoiding potential lighting issues.
  IEEE Transactions on Affective Computing 07/2011;
• Article: Emotion and attention interactions in social cognition: brain regions involved in decoding anger prosody

  D. Sander, D. Grandjean, G. Pourtois, S. Schwartz, M. L. Seghier, K. R. Scherer, P. Vuilleumier
  NeuroImage 28(4):848-858. · 5.89 Impact Factor
• Source

  Available from: unige.ch

  Article: Prosodie de l'émotion: étude de l'encodage et du décodage

  T Bänziger, D Grandjean, P J Bernard, G Klasmeyer, K R Scherer
• Source

  Available from: Tom Johnstone

  Article: Acoustic correlates of task load and stress

  K R Scherer, D Grandjean, T Johnstone, G Klasmeyer, T Bänziger
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  ABSTRACT: It is argued that reliable acoustic profiles of speech under stress can only be found if different types of stress are clearly distinguished and experimentally induced. We report first results of a study with 100 speakers from three language groups, using a computer-based induction procedure that allows distinguishing cognitive load due to task engagement from psychological stress. Findings show significant effects of load, and partly of stress, for speech rate, energy contour, F0, and spectral parameters. It is further suggested that the mean results for the complete sample of speakers do not reflect the amplitude of stress effects on the voice. Future research should isolate and focus on speakers for whom the psychological stress induction has been successful.