Tool Extension in Human-Computer Interaction

Joanna Bergström, Aske Mottelson, Andreea Muresan, Kasper Hornbæk

    Abstract

    Tool use extends people's representations of the immediately actionable space around them. Physical tools thereby become integrated in people's body schemas. We introduce a measure for tool extension in HCI by using a visual-tactile interference paradigm. In this paradigm, an index of tool extension is given by response time differences between crossmodally congruent and incongruent stimuli; tactile on the hand and visual on the tool. We use this measure to examine if and how findings on tool extension apply to interaction with computer-based tools. Our first experiment shows that touchpad and mouse both provide tool extension over a baseline condition without a tool. A second experiment shows a higher degree of tool extension for a realistic avatar hand compared to an abstract pointer for interaction in virtual reality. In sum, our measure can detect tool extension with computer-based tools and differentiate interfaces by their degree of extension. CCS CONCEPTS • Human-centered computing → HCI theory, concepts and models; HCI design and evaluation methods; Laboratory experiments; User studies; Empirical studies in HCI ;
    Original languageDanish
    Publication date2019
    Number of pages11
    DOIs
    Publication statusPublished - 2019

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