# Lessons from Oz: Design Guidelines for Automotive Conversational User Interfaces

## TL;DR

This paper presents design guidelines for automotive conversational user interfaces derived from Wizard-of-Oz studies, highlighting their positive effects on user experience and safety, and aiming to inform future in-vehicle CUI development.

## Contribution

It introduces a set of human-centered design guidelines for automotive CUIs based on empirical WoZ studies and user behavior analysis.

## Key findings

- In-vehicle CUIs reduce cognitive workload and fatigue.
- CUIs increase trust and acceptance among users.
- Design guidelines improve safety and engagement.

## Abstract

This paper draws from literature and our experience of conducting Wizard-of-Oz (WoZ) studies using natural language, conversational user interfaces (CUIs) in the automotive domain. These studies have revealed positive effects of using in-vehicle CUIs on issues such as: cognitive demand/workload, passive task-related fatigue, trust, acceptance and environment engagement. A nascent set of human-centred design guidelines that have emerged is presented. These are based on the analysis of users' behaviour and the positive benefits observed, and aim to make interactions with an in-vehicle agent interlocutor safe, effective, engaging and enjoyable, while confirming with users' expectations. The guidelines can be used to inform the design of future in-vehicle CUIs or applied experimentally using WoZ methodology, and will be evaluated and refined in ongoing work.

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Source: https://tomesphere.com/paper/1907.11179