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:Importantly, the results of Pascalis et al. (2005) also revealed that the now 9- month-olds (i.e., those infants who received additional exposure to the monkey faces) still showed reliable discrimination of monkey faces whereas a second group of 9-month-olds who did not receive the 3 months of…
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