Inaccuracies in energy efficiency perception based on instantaneous consumption displays – Implications for interface design


Art der Publikation: Journal Article

Veröffentlicht auf / in: Applied Ergonomics

Jahr: 2021

Verlag (Publisher): Elsevier


Vivien Moll

Thomas Franke


Instantaneous consumption displays (ICDs) can be used as central information source to perceive the energy efficiency of their manoeuvre-level driving. A key question is whether drivers who use ICDs can accurately derive efficiency value differences across driving strategies based on this information presented by the ICD. There is reason to assume that drivers’ consumption judgements may be biased, similar to related phenomena like the timesaving bias. Therefore, the aim of the present research was to examine drivers’ accuracy in deriving average consumption from dynamic ICD sequences. Participants viewed videos of a schematic ICD in a controlled experiment where the maximum instantaneous consumption systematically varied over time. Participants’ (N = 55) overestimated the average consumption values. The empirical ranking of the sequences also significantly differed from the correct efficiency ranks. The current study incorporated multilevel modelling due to the nested structure of the data. The estimation difference was greater with higher peak height and shorter peak duration. The effect of peak height on estimation difference weakens with longer peak duration. In sum, the results indicate that ICDs can create biased perceptions of energy efficiency. Knowledge and affinity for technology interaction appear to impact estimation biases, whereas experience with consumption displays seems irrelevant. Further studies should test less biased interface designs such as manoeuvre-based aggregation or fadingtrace approaches. Moreover, studies are needed that enable modelling of the effects of more natural temporal-spatial visual attention distribution (e.g., via an occlusion paradigm applied in a driving simulator setting).


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