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Just have a little trust : the less information you have, the better - or not? The effect of HMI information quantity on driver's trust.

Feldkamp, N. (2020) Just have a little trust : the less information you have, the better - or not? The effect of HMI information quantity on driver's trust.

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Abstract:Background. An increased amount of information is implemented in in-vehicle human-machine interface (HMI) designs. Driver's trust towards the amount of information communicated via HMI needs to be considered as the HMI is commonly the means through which communication between system and driver is established. In this real drive study, driver’s trust on varying HMI information quantities was investigated. A limited and rich HMI information quantity (LI-HMI vs. RI-HMI), the driver’s locus of control (LOC) and lastly an interaction effect between HMI information quantity and LOC were modelled to assess their effect on a driver’s trust in the in-vehicle HMI. Method. Overall, 15 employees of Opel Automobile GmbH took part in the 120-minutes real drive study in the area of Rüsselsheim, Germany. A mixed-study design was used, where all participants experienced an HMI with limited and rich information quantity. Results. Results of the Bayesian repeated measures ANOVA revealed that participants’ trust ratings were higher for the LI-HMI compared to the RI-HMI. General trust ratings of participants having an internal LOC did not differ from participants having an external LOC. Finally, no interaction effect between HMI information quantity and LOC on trust was found. Conclusion. Trust constitutes a contributing factor that should be considered in in-vehicle HMI design. An HMI providing a limited information quantity was associated with higher driver trust. This implicates that in HMI design adding information displayed to the driver instead of removing some should be reconsidered and deliberated. Moreover, the relationship between LOC and trust in the context of HMI information quantity seems to be different from the relationship of other domains in the human-human and human-machine interaction, where participants with an external LOC generally showed more trust than internal LOC participants.
Item Type:Essay (Master)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology MSc (66604)
Link to this item:http://purl.utwente.nl/essays/85289
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