RHY.4:4.3 - Compare positions under compatible observations

Use a shared time reference when combining instrumented observations. Account for known recording or delivery delays if they could change the correction. If those delays are unknown and consequential, compare within a setup that cancels them or leave the physical delay unresolved.

For an auditory judgement, a listener may adjust a reference click relative to a repeated sound. A synchronization task instead asks someone to tap with the sound. These tasks answer related but different questions: the tapping result includes the performed response. Preserve the task used; do not label every response timestamp the sound’s P-center.

For movement, use a receiving task suited to the question. A partner can identify when a transfer becomes usable, or respond to it in an agreed simple continuation. That response helps judge the interaction. A claim about a general perceptual center in dance would require its own definition and evidence.

Begin with the available discrimination. If the receiving participant can already distinguish the usable variant from the unusable one, submillisecond instrumentation may add nothing to the rehearsal choice.