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Understanding autism

Multiple-baseline study

A study, usually with a small number of participants, often in the same setting, who start the intervention after having been observed beforehand for differing lengths of time. For example one may start the intervention after 3 weeks, one after 5 weeks and one after 7 weeks. If each is seen to respond positively to the intervention this provides evidence that it is effective and the changes seen are not due to another factor.

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