If a repeated-measures design is used n=20 participants are needed for the study
If a matched-subjects design is used n=40 participants are needed for the study
Repeated measures configuration is an exploration plan that includes numerous proportions of similar variables taken on something similar or matched subjects either under various circumstances or throughout two or additional time spans. For example, repeated measures are gathered in a longitudinal report in which change after some time is surveyed.
A matched subject design involves separate trial bunches for every specific treatment, yet depends on coordinating each subject in one gathering with an identical one in another. The thought behind this is that it decreases the possibility of a persuasive variable slanting the outcomes by invalidating them.
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