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Capturing and using emotion-based BCI signals in experiments; how subject’s effort can influence results

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Proceedings of HCI 2011 The 25th BCS Conference on Human Computer Interaction (HCI)

Human Computer Interaction

4 - 8 July 2011

Attention, Stress, BCI, Stroop, Emotional response, Meditation, Concentration

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      Abstract

      This study uses minimally invasive technology to monitor the emotional response of a subject during stress inducing psychological tasks. The goal of these tasks is to investigate the possibility of measuring and subsequently categorising the subject’s level of stress using biosignal devices. If a consistent metric of stress can be determined it may be used for many forms of human-machine interaction in areas such as assessment and training. Two separate psychological tests were conducted, The Stroop Colour Word Interference Test (20 subjects), and The Towers of Hanoi (17 subjects). These tests examine directed attention, and sustained, consistent attention respectively. NeuroSky’s Mindset device was used to record the stress and attention level of each subject. We examined the subject’s attention while undertaking these tasks, and assessed any correlation between this and their level of stress during the task.

      This study shows that for most subjects, the less attent the subject is, the lower their stress level, and the higher the level of attention, the greater the level of stress (increased concentration etc.) As the difficulty of the task increased, some subjects appeared to ‘lose interest’ or reduce their level of attention, and consequently the level of stress measured decreased.

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      Isolation of specific interference processing in the Stroop task: PET activation studies.

      The Stroop task, in which subjects must name the color of letters that spell color words different than the color-to-be-named, provides an important experimental paradigm for the study of selective attention. Cerebral blood flow activation studies have not always demonstrated consistent activation patterns; inconsistent results may reflect nonspecific responses, such as arousal or anticipation, rather than cerebral networks specific to Stroop interference processing. In order to identify regions consistently implicated in Stroop interference processing, we undertook two experiments with a Stroop interference paradigm and contrasting lexical and nonlexical control conditions. In our first experiment, standard Stroop stimuli, e.g., the word "RED" displayed in a green font, were contrasted with color naming of the font of noncolor words and color naming of a false font. In our second experiment, we compared Stroop stimuli with colored symbols and a control condition designed to elicit nonspecific interference-taboo words displayed in color fonts. Only two brain regions showed a consistent CBF change in both experiments. Activation in the left inferior frontal gyrus reflected processing more specific to the Stroop task, while deactivation in the right superior temporal gyrus occurred for the Stroop and the taboo conditions, consistent with more nonspecific processing. Activation in the anterior cingulate cortex occurred in only one comparison in one experiment and may not reflect functions central to overcoming Stroop interference. Copyright 1997 Academic Press.
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        Associations among the Big Five, emotional responses, and coping with acute stress

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          Author and article information

          Affiliations
          Computer Science

          University College Cork
          Contributors
          Conference
          July 2011
          July 2011
          : 132-138
          10.14236/ewic/HCI2011.38
          © Katie Crowley et al. Published by BCS Learning and Development Ltd. Proceedings of HCI 2011 The 25th BCS Conference on Human Computer Interaction, Newcastle Upon Tyne, UK

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Proceedings of HCI 2011 The 25th BCS Conference on Human Computer Interaction
          HCI
          25
          Newcastle Upon Tyne, UK
          4 - 8 July 2011
          Electronic Workshops in Computing (eWiC)
          Human Computer Interaction
          Product
          Product Information: 1477-9358 BCS Learning & Development
          Self URI (journal page): https://ewic.bcs.org/
          Categories
          Electronic Workshops in Computing

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