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In an attempt to examine children's encoding and storage of faces, two experiments are reported on temporal factors in recognition memory for unfamiliar faces by 7-year-old and 10-year-old children. In Expt 1, viewing durations of 1 and 3 seconds and delay intervals of 0 and 1 week were examined. The younger children were less accurate at immediate test: no difference between the two age groups was evident after a week's interval. Faces presented for 3 s were recognized more accurately than those shown for 1 s. Experiment 2 involved a modification in design and temporal parameters: faces were shown for either 2 or 6 s and testing followed immediately, a day later, or a week later. The performance of 7-year-olds was unaffected by duration of encoding or length of interval. In contrast the 10-year-old children performed better with 6 s compared with 2 s exposure. They also made more accurate recognition at immediate test compared with intervals of 1 day or 1 week. The results of these two experiments provide the first systematically derived data on the way children process facial information as a function of viewing duration and delay interval. Theoretical and practical implications of the observations are discussed.