Exploring the perception of expressivity and interaction within musical dyads
visual representations of biological motion using the point light technique has been demonstrated that provide adequate information in order to recognize different activities, such as running, walking, or playing a musical instrument (Johansson, 1973) Visual cues have primary importance for the perception of expressive intentions (Davidson, 1993) Davidson studied solo pianists and showed that the visual channel dominates our music perception. Visual information seems adequate to recognize nominal emotional qualities, such as happy, sad, anger (Dahl Friberg, 2007) and it has been used to recognize expressive conductors' gestures (Luck, Toiviainen, Thompson, 2010) Furthermore, the importance of appreciation of music is enhanced using audio visual stimuli (Platz Kopiez, 2012) and several reports have shown crossmodal interactions between vision and sound (Chapados Levitin, 2008; Vuoskoski et al. 2016) 2.3 Music Interaction Representation is how we conceptualize phenomena in order to facilitate our understanding, whereas interaction is the way that our experience is being shaped by them. Interaction in musical terms is multifaceted and it may refer to different aspects of the musical realm, from instrument performer and human computer interaction, to performeraudience, performer performer and teacher learner interaction. As we have noted in the section 2.1.3 the current study explored the aspect of social interaction within dyadic performance. In that respect we investigated music interaction in the context of performerperformer interaction. It is prerequisite that both individuals are aware that they are sharing a common experience in order to achieve a collaborative action (Tomasello Carpenter, 2007) Gestures are considered as having a primitive role compared to that of concepts (Gill, 2015) and it has been noted that they may served as a prelinguistic form of communication (Sebanz et al. 2006) The evolution of language is of particular importance in the human evolution, as it enabled the flourish of art and science (Daniels Bright, 1996, p. 265) 2.4 Musical Gestures Music and movement are tightly bind with each other. Nonverbal cues have a catalytic role in music performance. We move our bodies in response to music, and we are being moved from musicians expressive intentions. In that respect musical gestures play an important role in the perception and appreciation of music by the audience. Musical