Guidage attentionnel à base de flou audiovisuel pour la conception d'interfaces multimodales

To improve presentation strategies in multimedia browsing systems, perceptual processes involved in the search of a specific audiovisual object displayed among several distractors were investigated. The aim was to enhance the perceptual salience of the target to facilitate and speed up the search process. As visual blur was previously shown as an effective means for user guidance towards a sharp item in a set of blurred distracters, we propose to extend visual blur to audio and audiovisual blurs to improve multimodal search. A perceptual experiment was performed out to evaluate the effect of audio and visual blurs as well as audiovisual blur combinations. Participants had to retrieve an audio-visual target among six audiovisual concurrent objects. Results showed that both visual and audio blurs rendered distractors less prominent and helped users to focus on a sharp target. Furthermore, search task response times were even faster and accuracy even greater with a redundant combination of audio and visual blurs.