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:For dyslexic observers, the most prominent effects were a decrease in the 4th–5th difference at the long ISI compared with the control observers which replicates the findings of Hari and Kiesilä (1996).
Category: