Du véhicule thermique au véhicule électrique : pratiques instrumentées et vécus de l'autonomie modifiée

Abstract : This research aims to study the electric vehicle range management and to explore the behavior and the lived experience of users of thermal vehicle (TV) and electric vehicle (EV). It has allowed the acquisition of knowledge about the situated use of electric vehicle and associated informational needs. In the first phase of our study, a framework has been established through the study of the thermal vehicle range management. We identified four styles of "range management" on the basis of interviews and quantified using a questionnaire. These styles fit the cognitive-affective relationship and the behavior related to the risk of breakdown: some drivers are worried and anticipate their recharge to control uncertainty and risk, while others does not care and expect to reload much later. Three classes of determinants (individual, artefactual and contextual), influencing the adoption of a proactive or reactive practice, were identified. The second phase of our study was dedicated to the identification of the range management practices through a two weeks EV loan to nine drivers. The results, based on diaries and resituated interviews, highlighted the transfer of range management styles from TV to EV and their influence on risk-taking. The results also revealed the establishment of an almost daily refueling frequency for most drivers, a greater anticipation to control the electric vehicle range, the context in which some problematic routes appear, and sources of emotional comfort and discomfort. The study of artefacts proposed for range management resulted in a typology of instruments: they were classified in prospective, reflective, reflective synthetic and pragmatic instruments. Their roles and appropriation have been specified according to the context of use and styles. The development of “instruments system” by drivers and practical tests allow them to control their autonomy. The study of temporal evolution of practices and experiences showed an evolution of the risks taken with the VE which coincides with range management styles and an overall feeling of control. With both TV and EV, we note that styles may evolve to a lower anticipation with time. The tests and appropriation of instruments contribute to reduce this anticipation. The third phase of our study was based on the experience of the nine drivers who participated individually in sessions of projective creativity, based on two prototypes and allowing the expression of expectations in terms of instruments and services development. Participants expressed more expectations for prospective instruments and the results showed a positive influence of prototypes models for the requirements expressed. These methods and results were finally discussed in terms of theoretical and practical contributions and research opportunities they foreshadow.
Keywords : User expectation
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Theses
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Claudine Nguyen. Du véhicule thermique au véhicule électrique : pratiques instrumentées et vécus de l'autonomie modifiée. Psychologie. Télécom ParisTech, 2013. Français. ⟨NNT : 2013ENST0069⟩. ⟨tel-01195723⟩

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