Abstract: Two intervals were presented at the same time auditorily or visually.Following the presentation, the subject was given randomly one of the twointervals, and was asked to reproduce it immediately orafter a delay of 5sec.The results showed that: (1) In the short time interval condition (1sec.,1.5sec., 2sec.),the reproduction is more accurate for audition rather than vision,and for audition,deley has little effect on temporal information coding. How-ever, in the Iong interval condition (10sec., 11sec., 12sec.), the subject'spreformance was indistinguishable whether the intervals were presented audi-torily or visually. (2) The source of the modality effects is not sensory storedbut memory. (3) Positive time-order-error often occurred in the judgement off-short time interval,negative time-order-error was more likely to occur in longtime interval.

Key words: time judgement, auditory-visual modality\effect, memory, time-order-error