Richard L. Hazlett

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This paper describes the use of facial electromyography (EMG) as a measure of positive and negative emotional valence during interactive experience. Thirteen boys played a car racing video game on an Xbox platform while facial EMG data were collected. Through video review positive and negative events during play were identified. The zygomaticus muscle EMG,(More)
To provide insight into what aspects of the emotional circuit might be affected in high-functioning autism, we measured indices of physiological emotions and of the expression of conscious feelings in 10 children with high-functioning autism or Asperger syndrome and 10 comparison participants. Pleasant, unpleasant, and neutral pictures were presented while(More)
This paper describes the use of facial EMG to provide a continuous measure of the user's emotional state. Facial EMG was recorded while female users performed five tasks to one of two web sites. Frustration index scores were developed from the corrugator EMG data by calculating a percentage score of a pre-task baseline. As predicted, the frustration index(More)
This study used facial electromyographic (EMG) techniques to investigate the effects of perceived physical attractiveness of a target on female viewers’ facial muscle activity and self-reported emotion. Female subjects viewed slides of adult males and females that varied in attractiveness. When these female subjects viewed same-sex stimuli, the highly(More)
Generalized anxiety disorder (GAD) is a common psychiatric disorder characterized by constant worry or anxiety over every day life activities and events. The neurobiology of the disorder is thought to involve a wide cortical and subcortical network that includes but is not limited to the amygdala and the bed nucleus of the stria terminalis (BNST). These two(More)
The purpose of this study was to investigate the association among daily stressors, cognitive rumination, and fibromyalgia symptoms using time-series methodology and to determine whether autocorrelation was present in the self-report data. Twelve female fibromyalgia subjects monitored their daily level of stressors, cognitive rumination, and fibromyalgia(More)
The purpose of this study was to investigate the amplitude characteristics of frontalis and gastrocnemius electromyographic (EMG) activity in clinically anxious and nonanxious populations. Eighteen women with generalized anxiety disorder (GAD) and 19 nonanxious women were compared during baseline, laboratory stressor, and recovery conditions. EMG mean(More)
Three studies were conducted to examine the feasibility, reactive effects of assessment, stability, sampling parameters, and sensitivity of an assessment procedure designed to measure cardiovascular responses to a discrete, naturally occurring, and replicatable stressor—university course examinations. Undergraduate students monitored their blood pressure(More)
Facial electromyography (EMG) has been used in marketing research to measure emotional reaction to brand and advertising. This paper reports on two studies that bring EMG to HCI. We demonstrate the usefulness of measuring involuntary emotional reaction at key product purchase evaluative stages: firstimpression (aesthetic) and during use (interaction).