time - 031:010 - Research Methods in Psychology Spring,...

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031:010 - Research Methods in Psychology Spring, 2010 March 2 nd 1
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Background / Set Up many real- world “interventions” involve applying some treatment (to a group of people) and looking for a change in their behavior e.g., try a new way of teaching subtraction introduce a new anti-binge-drinking program the problem is the automatic confound between before-vs-after treatment and time-of-testing what do we do about this? 2
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Outline basic Interrupted Time Series Design three ways to control for the confounds - get an estimate of the effect of time from extra measures - get an estimate of the effect of external events from a separate group of subjects (two ways to do this) - get an estimate of the effect of external events from a separate measure 3
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Interrupted Time Series Design 4 treatment applied time whatever you’re interested in is the drop in the DV due to the treatment or due to (anything related to) time?
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Interrupted Time Series Design 5 treatment applied whatever you’re interested in time
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Interrupted Time Series Design 6 treatment applied whatever you’re interested in time
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Interrupted Time Series Design 7 treatment applied whatever you’re interested in time
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Interrupted Time Series Design 8 treatment applied whatever you’re interested in time
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time - 031:010 - Research Methods in Psychology Spring,...

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