ESSV Konferenz Elektronische Sprachsignalverarbeitung

Title: User Acceptance of Proactive Voice Assistant Behavior

Authors: Maria Schmidt, Wolfgang Minker, Steffen Werner


Using Personal Assistants (PAs) via voice becomes increasingly popular and available in multiple environments, thus we aim to provide proactive PA suggestions to car drivers via speech. Since these suggestions should enhance the user experience while avoiding obtrusiveness and cognitive load, we assess these factors in a usability study. We investigate how 42 participants perceive proactive voice output in a Wizard-of-Oz study in a driving simulator. We varied traffic density during a highway drive and included six in-car-specific use cases. The latter were presented by a proactive voice assistant and in a non-proactive control condition. We assessed the users’ subjective cognitive load in a DALI questionnaire during the interaction with both PA variants. Additionally, the users rated their experiences in a SASSI questionnaire. The results show that proactive assistant behavior is rated similarly positive as non-proactive behavior. In line with previous research, the most driving-relevant use cases receive the best ratings.

Year: 2020
In session: (Speech) Assistents
Pages: 18 to 25