Abstract: ln two experiments, memory for temporal order and item was tested by list identification and free recall. Subjects received five lists containing 50 Chinese two- character words from ten categories, each of which included five items. The structure of the lists separated all the items into two types: Same - category words within the list and across lists. The results are as follows: (l) When measure was delayed 2、6 and l0 seconds, temporal order memory for the same - category word within the list was better than across lists; only when the measure was delayed 2 seconds, item memory had an advantage for the same - category words within the list (2) The advantage of item memory for the same - category words within the list existed in recall cued by categories, not by the lists. (3) There are effects of the serial - list position on two types of memory.

Key words: temporal order memory, item memory, list identification, similarity effect