An ANOVA (ANalysis Of VAriance), not to be confused with a nova, is a hypothesis testing procedure for use with two or more groups of data.

Within-Group - values obtained from one group (factor level)

F-Distribution - The distribution used for determining the significance in ANOVA.

Sum of Squared Deviations - A quantity that is obtained by squaring and adding the differences between a group of values and their mean. SUM((X¡ - mean)²)

Eta Squared - the Correlation Ratio also known as R², the Proportion of Variance Accounted For.

Independent Variable - A variable that is manipulated by the researcher.

Factor - One of the independent variables.

Repeated Measures - The same participants (subjects) being repeatedly measured.

References:

Analysis of Variance for FMRI Data by B. Douglas Ward and Gang Chen. http://afni.nimh.nih.gov/afni/doc/manual/ANOVA

Statistics for Psychology, 2nd Ed. Arthur Aron and Elaine N. Aron. Prentice Hall 1999. ISBN 0-13-914078-6.