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:…reduced engagement of medial temporal regions during the construction of future events in depressed patients (Hach et al., 2014), which is consistent with the reduced episodic detail and vividness of mental imagery that is associated with this disorder (Holmes et al., 2008b; King et al., 2011).
Category: