Visual Appendix 1: Intuitive enabling. Arthur Hull facilitates a late-stage drum circle

Visual Appendix 2: Intuitive enabling - Bobby McFerrin and the pentatonic scale

World Science Festival 2009: Bobby McFerrin Demonstrates the Power of the Pentatonic Scale from World Science Festival on Vimeo.

Visual appendix 3: mutual musical engagement, demonstrating entrained, improvised, tuned-in dialogue

A convincing example of non-human entrainment?

World Science Festival 2009: Snowball, the Dancing Cockatoo from World Science Festival on Vimeo.