Repeated measures ANOVA: Difference between revisions

Revision as of 21:12, 13 August 2008

Resource type: this resource contains a tutorial or tutorial notes.

The repeated measures design is also known as a within-subject design. In this design, participants may present scores for:

The same measure repeated over time
(e.g., Self-confidence before, after, and following-up a psycho-social intervention), and/or
Across more than one condition
(e.g., experimental and control conditions), and/or
Several related and comparable factors
(e.g., sub-scales of an IQ test).

Sphericity: Instead of the homogeneity of variance assumption (which is part of one-way (between-subjects) and factorial ANOVA designs, repeated-measures designs have the assumption of sphericity, tested by Mauchly's sphericity test.

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 ==Overview==
 The '''repeated measures design''' is also known as a '''within-subject design'''. In this design, participants may present scores for:
-# The same measure repeated over time (e.g., [[w:Self-confidence|Self-confidence]] before, after, and following-up a psycho-social intervention), and/or
+# The same measure repeated over time<br>(e.g., [[w:Self-confidence|Self-confidence]] before, after, and following-up a psycho-social intervention), and/or
-# Across more than one condition (e.g., experimental and control conditions), and/or
+# Across more than one condition<br>(e.g., experimental and control conditions), and/or
-# Several related and comparable factors (e.g., sub-scales of an [[IQ]] test).
+# Several related and comparable factors<br>(e.g., sub-scales of an [[IQ]] test).
 ==Assumptions==