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:Statistics
 G-tests of interdependence (Sokal and Rohlf 1981) were used to compare overall activity, locomotor, posture, and support-use profiles (Doran 1992, 1993; McGraw 1996, 1998a, b; Dunham and McGraw 2014).
Category: