Multimodal Affect: Perceptually Evaluating an Affective Talking Head

摘要

Many tasks such as driving or rapidly sorting items can be best achieved by direct actions. Other tasks such as giving directions, being guided through a museum, or organizing a meeting are more easily solved verbally. Since computers are increasingly being used in all aspects of daily life, it would be of great advantage if we could communicate verbally with them. Although advanced interactions with computers are possible, a vast majority of interactions are still based on the WIMP (Window, Icon, Menu, Point) metaphor [Hevner and Chatterjee 2010] and are, therefore, via simple text and gesture commands. The field of affective interfaces is working toward making computers more accessible by giving them (rudimentary) natural-language abilities, including using synthesized speech, facial expressions, and virtual body motions. Once the computer is granted a virtual body, however, it must be given the ability to use it to nonverbally convey socio-emotional information (such as emotions, intentions, mental state, and expectations) or it will likely be misunderstood. Here, we present a simple affective talking head along with the results of an experiment on the multimodal expression of emotion. The results show that although people can sometimes recognize the intended emotion from the semantic content of the text even when the face does not convey affect, they are considerably better at it when the face also shows emotion. Moreover, when both face and text convey emotion, people can detect different levels of emotional intensity.