Joint analysis of the emotional fingerprint in the face and speech: A single subject study

In daily human interaction, speech and gestures are used to express an intended message, enriched with verbal and non-verbal information. Although many communicative goals are simultaneously encoded using the same modalities such as the face or the voice, listeners are generally good at decoding each aspect of the message. This encoding process includes an underlying interplay between communicative goals and channels, which is yet not well understood. In this direction, this paper explores the interplay between linguistic and affective goals in speech and facial expression. We hypothesize that when one modality is constrained by the articulatory speech process, other channels with more degrees of freedom are used to convey the emotions. The results presented here support this hypothesis, since it is observed that facial expression and prosodic speech tend to have a stronger emotional modulation when the vocal tract is physically constrained by the articulation to convey other linguistic communicative goals.