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Manual Event (Session ID,DateTime,Event) = dbortqs9tkp68gcof4rqlkh5vl 20210728125628 /communities/in-what-way-a-posttest-only-design-with-nonequivalent-groups-is-better-than-a-posttest-only-design-with-no-comparison-group/

In what way a posttest-only design with nonequivalent groups is better than a posttest-only design with no comparison group?

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Carrie
21 May 2020
In what way a posttest-only design with nonequivalent groups is better than a posttest-only design with no comparison group?

In what way a posttest-only design with nonequivalent groups is better than a posttest-only design with no comparison group?

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Tsz Ching
23 May 2020

Welcome! ^^

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Carrie
23 May 2020

Thank you.

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Tsz Ching
23 May 2020

It uses some form of control group that does not receive the treatment. This can avoid some threats to internal validity such as the effect of testing. Also, this design is more informative.

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