作者: Gene V. Glass
DOI: 10.3102/00028312009003463
关键词:
摘要: Observation of a variable Z at several equally spaced points in time yields the observations z1, z2,..., ZN. Suppose that an intervention (T) is made some point before N into process presumed to be controlling Z. The time-series said interrupted time, say nl less than N: ..., zn, T, zn + 1, When for purposes studying its effects, whether they change level or direction, on time-series, pardigm what has come called educational research and social