The potential reactivity of videotaping procedures in the study of conversation behavior was assessed. Four videotaping procedures and eight time segments were cast into a mixed factorial design. No statistically significant differences in behavioral indices of relaxation/anxiety or responsiveness due to obviousness of video recording procedures were found. Anxiety dropped significantly during the first minute and then stabilized. Although a statistically significant difference in responsiveness over time was obtained, there was no meaningful pattern to this difference. Results support the commonly held intuition that behaviors usually out of conscious awareness are not affected by observation procedures. The implication of these results is that participant deception concerning observation procedures is unnecessary when out-of-consciousness behaviors are the subject of study.