Add new term: induce recursive synchrony BCT

[oleksiikartashovde-glitch]

Module: Behaviour Change Techniques
Suggested parent class: BCIO_050349 (restructure the social environment BCT)
Proposed label: induce recursive synchrony BCT

Definition: A behaviour change technique that organises participants to
simultaneously perform identical physical actions or gestures, creating a condition
in which each participant is simultaneously a source and recipient of the same social
stimulus, thereby amplifying group identity, reducing individual epistemic vigilance,
and concentrating shared attentional focus.

Examples: synchronised applause at a specified moment in a group session;
coordinated physical movement in group intervention sessions; simultaneous gesture
performance in community behaviour change events; chanting or rhythmic vocalisation
in group settings.

Rationale: Recursive synchrony operates through three simultaneous mechanisms:
(1) deictic — each participant's gesture activates deictic processing in all other
participants; (2) motor embodiment — performing the action activates associated
cognitive and motivational states; (3) social bonding — synchronised movement
increases interpersonal trust and group cohesion (Wiltermuth & Heath, 2009).
The magnitude of effect scales with group size and degree of synchrony. This BCT
is distinct from social modelling (where one participant observes another) in that
all participants perform simultaneously, creating a recursive loop in which each
person is both source and recipient. It is also distinct from restructuring the
social environment in that its primary mechanism is neurobiological synchronisation
rather than environmental modification. Currently not codeable in BCIO.

References:

• Wiltermuth, S.S., & Heath, C. (2009). Synchrony and cooperation. Psychological Science, 20(1), 1–5.
• Csibra, G., & Gergely, G. (2009). Natural pedagogy. Trends in Cognitive Sciences, 13(4), 148–153.

Suggested label: new term