“…Researchers have used different approaches to investigate this issue, by focusing, for example, on how the synchronization between multiple signals has a facilitation effect in the interaction between mothers and children (Gogate, Bahrick, & Watson, 2000) and on the relative contribution of each modality when they provide conflicting (Massaro & Egan, 1996) or congruent emotional information (Bänziger, Grandjean, & Scherer, 2009;Martinez, Falvello, Aviezer, & Todorov, 2015;Wallbott & Scherer, 1986). While it seems clear and reasonable that multimodal expressions would be better recognized than unimodal expressions, the specific role of each modality remains to be determined (Martinez et al, 2015;Paulmann & Pell, 2011). …”