Mansell J
J Behav Ther Exp Psychiatry. 1985 Sep;16(3):245-51. doi: 10.1016/0005-7916(85)90070-9.
The accuracy of momentary time-sampling was evaluated for behaviors occurring for different proportions of time, for different momentary time-samples and for sessions of different lengths. For 1-hr sessions, momentary time-samples of 10, 20 or 30 see intervals between observations yielded 90% of estimates within 10% of the comparison standard, for behaviours of 25%, 50% and 70%. Behaviours occurring for 2% of the session were not accurately recorded even at 10-sec momentary time-samples. For a 5-min momentary time-sample, this criterion was only approached when 8 hr data was averaged to give a single score for each individual, for behaviours of 25% or more. The 5-min momentary time-sample was also compared with a 1 in 5-min cluster sample; although less accurate, cluster-sampling might be a useful strategy in some settings.
针对不同时间比例出现的行为、不同的瞬间时间抽样以及不同时长的时段，对瞬间时间抽样的准确性进行了评估。对于1小时的时段，在观察之间间隔10秒、20秒或30秒的瞬间时间抽样，对于出现比例为25%、50%和70%的行为，所得到的估计值有90%在比较标准的10%范围内。即使是在10秒的瞬间时间抽样下，在时段中出现比例为2%的行为也无法被准确记录。对于5分钟的瞬间时间抽样，只有在将8小时的数据进行平均以得出每个个体的单一分数时，对于出现比例为25%或更高的行为，才接近这一标准。还将5分钟的瞬间时间抽样与每5分钟一次的整群抽样进行了比较；尽管准确性较低，但整群抽样在某些情况下可能是一种有用的策略。
