Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:Analysis of variance for repeated measurements (ANOVA) was performed to assess the significance of differences in means between and within the groups and post-hoc analysis with the
Tukey method was performed if any position effects and ⁄ or position-group interactions proved significant by ANOVA [6].
Category: