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:While previous pharmacological studies of AVP have often yielded ambiguous anxiety results, the most consistent data on the effects of AVP is the stimulation of a stereotypy of scratching and autogrooming (Meisenberg, 1988; Moody et al, 1988).
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