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Advances in film and video technology in recent years have made in increasingly feasible for students of social interaction to record, for fine-grained analyses, sound-image records (SIR). Such records have two principal advantages: density and permanence. Optimal data continues to require that investigators attend to ethnographic grounding and other criteria of data adequacy. The questions of what constitutes naturally occurring interaction and of the objectivity of SIR devices are briefly discussed.
Allen D. Grimshaw (Mon,) studied this question.