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Publication Tag: Human Factors

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2013
5 citations
Positive Affective Interactions: The Role of Repeated Exposure and Copresence
Shahid, Krahmer, Neerincx, Swerts
We describe and evaluate a new interface to induce positive emotions in users: a digital, interactive adaptive mirror. We study whether the induced affect is repeatable after a fixed interval (Study 1) and how copresence influences the emotion induction (Study 2). Results show that participants systematically feel more positive after an affective mirror session, that this effect is repeatable, and stronger when a friend is copresent.
2017
20 citations
Clusters of Nonverbal Behaviors Differ According to Type of Question and Veracity in Investigative Interviews in a Mock Crime Context
Matsumoto & Hwang
Evaluating truthfulness and detecting deception is a capstone skill of criminal justice professionals, and researchers have long examined nonverbal cues to aid in such determinations. This paper examines the notion that testing clusters of nonverbal behaviors is a more fruitful way of making such determinations than single, specific behaviors. Participants from four ethnic groups participated in a mock crime and either told the truth or lied in an investigative interview. Fourteen nonverbal behaviors of the interviewees were coded from the interviews; differences in the behaviors were tested according to type of question and veracity condition. Different types of questions produced different nonverbal reactions. Clusters of nonverbal behaviors differentiated truth tellers from liars, and the specific clusters were moderated by question. Accuracy rates ranged from 62.6 to 72.5% and were above deception detection accuracy rates for humans and random data. These findings have implications for practitioners as well as future research and theory.
2017
27 citations
Sensory-specific satiety: Added insights from autonomic nervous system responses and facial expressions
He, Boesveldt, Delplanque, de Graaf, de Wijk
As a food is consumed, its perceived pleasantness declines compared to that of other foods. Although this phenomenon, referred to as sensory-specific satiety, is well-established by means of measuring food intake and pleasantness ratings, this study was aimed at gaining more insight into the mechanisms that underlie such cognitive output behavior using two measures used in emotion research, namely Autonomic Nervous System responses and facial expressions. Twenty-four healthy female participants visited four times in a hungry state, in which they received 4 different semi-liquid meals delivered via a time-controlled pump leading to sensory-specific satiety. Before and after the meals they were presented with a sip of all four different test meals where ANS responses and facial expressions were recorded. As expected, pleasantness ratings showed a significant decrease after eating the same meal or a meal similar in taste , and less decrease after eating a meal with a different taste. In general, consumption of the test meals resulted in increased heart rate, reduced skin conductance and skin temperature, as well as intensified anger and disgusted facial expressions . In addition, skin conductance, skin temperature, sad and angry expressions also showed effects reflecting sensory-specific satiety. In conclusion, ANS responses and facial expressions indicate that sensory specific satiety of foods 1) not only reduces the food’s pleasantness but also arousal and 2) are possibly mediated by changes in food emotions.
2012
16 citations
Behavioural and physiological responses to two food odours
He, Boesveldt, de Graaf, de Wijk
Consumer food choice and intake are largely controlled by unconscious processes, which may be reflected better by implicit physiological and behavioural measures than by the more traditional explicit sensory tests. In this study, 26 human participants were exposed to an orange (pleasant) and a fish (unpleasant) odour presented in three different concentrations perceived as weak, medium and strong intensity, and five replications in a semi-random order via an olfactometer (Burghart OM2). Reactions to these odours were measured implicitly by means of facial expressions (automatically analysed with FaceReader), skin conductance responses and heart rate frequency (automatically analysed by Biolab), and explicitly with pleasantness ratings. Facial expressions reflected the odour’s valence (71% explained variance) and ranged from neutral (orange) to sadness/disgust/anger (fish) but showed additional differentiation with respect to odour intensity (15% explained variance). Skin conductance responses were largest for the unpleasant odour (p < 0.05), but showed no intensity effect. The unpleasant odour resulted in increased heart rate whereas the pleasant odour resulted in reduced heart rate (p < 0.05). The heart rate effects increased with intensity (p < 0.05). Different degrees of exposure were reflected in the implicit behavioural and physiological tests but not in the explicit pleasantness test. In summary, implicit physiological and behavioural responses provide detailed information on specific food odours that may not be provided by other more explicit tests.
2017
5 citations
Multimodal Observation and Interpretation of Subjects Engaged in Problem Solving
Guntz, Balzarini, Vaufreydaz, Crowley
In this paper, the authors present initial findings from a pilot experiment aimed at capturing and interpreting multimodal signals from human experts solving challenging chess problems. The study investigates how observations of eye-gaze, posture, emotion, and other physiological signals can model the cognitive state of subjects. It also explores integrating multiple sensor modalities to enhance the reliability of detecting human displays of awareness and emotion. Chess players were observed tackling problems of increasing difficulty while their behavior was recorded. These recordings help estimate a participant’s situational awareness and predict their ability to respond effectively to challenging situations. The results indicate that a multimodal approach is more accurate than a unimodal one. By combining body posture, visual attention, and emotion, the multimodal approach achieved up to 93% accuracy in determining a player’s chess expertise, compared to 86% with a unimodal approach. The experiment also validates the use of the equipment as a general and reproducible tool for studying participants engaged in screen-based interaction and problem-solving.
2017
6 citations
Memory Effect in Expressed Emotions During Long Term Group Interactions
Gorbunov, R. , Barakova, E., Rauterberg, M.
Long-term group interactions can be assessed through games where participants choose between cooperative or egoistic strategies. This study analyzed facial expressions of astronauts during repeated game interactions in the Mars-500 isolation experiment. Using FaceReader software, the researchers identified a memory effect in collective emotional expressions between experiments separated by two weeks. This suggests the potential to predict the development of interpersonal relationships in isolated groups, informing the design of long-term interaction behaviors in artificial agents.
2014
117 citations
Facial expressions and autonomous nervous system responses elicited by tasting different juices
Danner, Haindl, Joechl, Duerrschmid
The study aimed to understand reactions elicited by tasting different juices by examining self-reported liking, autonomic nervous system responses, and both implicit and explicit facial expressions. Eighty-one participants tasted banana, grapefruit, mixed vegetable, orange, and sauerkraut juices. Measurements included skin conductance level , skin temperature , heart rate , pulse volume amplitude , and facial expressions. Results showed significant differences in SCL and PVA responses, as well as in the intensity of several facial expressions across the juices. A moderate correlation was found between these physiological responses and self-reported liking, allowing differentiation between liked, disliked, and neutral samples. Notably, in the implicit approach, participants displayed minimal positive emotions for liked samples, whereas in the explicit approach, they exhibited strong positive emotions. Negative emotions were more pronounced for disliked samples in both approaches. The findings suggest that self-reported liking, ANS responses, and facial expressions provide distinct information about taste experiences. The article was accepted on 4 June 2014.
2017
66 citations
The Effect of Parental Modeling on Child Pain Responses: The Role of Parent and Child Sex
Boerner, Christine, McGrath, LoLordo, Uher
Social modeling is a process by which pain behaviors are learned, and research has found parents act as models for their children’s behavior. Despite social learning theory predicting that same-sex models have greater effect, no experimental investigation to date has examined the role of sex of the model or observer in social learning of pediatric pain. The present study recruited 168 parent-child dyads in which children were generally healthy and 6 to 8 years old. Unbeknownst to their child, parents were randomly assigned to exaggerate their expression of pain, minimize their expression of pain, or act naturally during the cold pressor task . Parents completed the CPT while their child observed, then children completed the CPT themselves. Children whose parents were in the exaggerate condition reported higher anxiety than children of parents in the minimize condition. Additionally, girls in the exaggerate condition rated their overall pain intensity during the CPT significantly higher than boys in the same condition. No child sex differences were observed in pain intensity for the control or minimize conditions. Parent expressions of pain affects children’s anxiety, and sex-specific effects of parental exaggerated pain expression on children’s own subsequent pain experience are present. Perspective: This article describes how parental expressions of pain influence children’s pain and anxiety, specifically examining the relevance of parent and child sex in this process. These findings have implications for children of parents with chronic pain, or situations in which parents experience pain in the presence of their child .

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