Abbreviated Interrupted Time-Series - Institute for Policy Research
Abbreviated Interrupted Time-Series - Institute for Policy Research
Abbreviated Interrupted Time-Series - Institute for Policy Research
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Summary<br />
• ITS is a very powerful design, but feasibility depends<br />
on the availability of a good archived outcome, or<br />
ability to gather original data<br />
• Much prior in<strong>for</strong>mation is available in education, at<br />
individual, cohort and school levels<br />
• But it is not much used in education outside of<br />
special education with individual cases. Why?<br />
Its use is not recommended without a comparison<br />
time series due to unclear extrapolations from<br />
pretest alone and uncertainty about when an effect<br />
should appear