Gardenier Nicole Ciotti, MacDonald Rebecca, Green Gina
New England Center for Children, 33 Turnpike Road, Southborough, MA 01772-2108, USA.
Res Dev Disabil. 2004 Mar-Apr;25(2):99-118. doi: 10.1016/j.ridd.2003.05.004.
We compared partial-interval recording (PIR) and momentary time sampling (MTS) estimates against continuous measures of the actual durations of stereotypic behavior in young children with autism or pervasive developmental disorder-not otherwise specified. Twenty-two videotaped samples of stereotypy were scored using a low-tech duration recording method, and relative durations (i.e., proportions of observation periods consumed by stereotypy) were calculated. Then 10, 20, and 30s MTS and 10s PIR estimates of relative durations were derived from the raw duration data. Across all samples, PIR was found to grossly overestimate the relative duration of stereotypy. Momentary time sampling both over- and under-estimated the relative duration of stereotypy, but with much smaller errors than PIR (Experiment 1). These results were replicated across 27 samples of low, moderate and high levels of stereotypy (Experiment 2).
我们将部分间隔记录（PIR）和瞬间时间抽样（MTS）估计值与患有自闭症或未另行指定的广泛性发育障碍的幼儿刻板行为实际持续时间的连续测量值进行了比较。使用一种技术含量较低的数据记录方法，对22个刻板行为的录像样本进行评分，并计算相对持续时间（即刻板行为消耗的观察期比例）。然后，从原始持续时间数据中得出相对持续时间的10秒、20秒和30秒MTS以及10秒PIR估计值。在所有样本中，发现PIR严重高估了刻板行为的相对持续时间。瞬间时间抽样对刻板行为的相对持续时间既有高估也有低估，但误差比PIR小得多（实验1）。这些结果在27个低、中、高不同水平刻板行为的样本中得到了重复验证（实验2）。
