%0 Journal Article %@ 1754-8853 %A Gnecco, Giorgio %A Glowinski, Donald %A Camurri, Antonio %A Sanguineti, Marcello %D 2014 %F eprints:2613 %I Inderscience %J International Journal of Arts and Technology %K automated analysis; behavioural analysis; non-verbal behaviour; head ancillary gestures; levels of attention; orchestral behaviour; head movements; orchestras; non-verbal social signals; non-verbal communication; social groups; music conductors; musicians. %N 4 %P 316-338 %T On the detection of the level of attention in an orchestra through head movements %U http://eprints.imtlucca.it/2613/ %V 7 %X Results from a study of non-verbal social signals in an orchestra are presented. Music is chosen as an example of interactive and social activity, where non-verbal communication plays a fundamental role. The orchestra is adopted as a social group with a clear leader (the conductor) of two groups of musicians (the first and second violin sections). It is shown how a reduced set of simple movement features - head movements - can be used to measure the levels of attention of the musicians with respect to the conductor and the music stand under various conditions (different conductors/pieces/sections of the same piece).