Our goal was to investigate the effects of temporal judgment on source monitoring and response bias for imagined and perceived drawings. We separated the learning sessions into two days (Day I and Day 2) and collected the Day 2 source of each item. The results show that among participants who viewed perceived drawings on Day 1 and imagined items on Day 2, the likelihood of attributing the test items to the perceived drawings category increased with increased repetition of the perceived items. However, when an item was perceived in the learning phase, even if items were imagined repeatedly, the "imagined" responses did not interfere with the rate of "perceived" responses. Furthermore, when an "unknown" response category was included, the response bias of "imagined" decreased, but the response bias of "perceived" did not.

Key words: source monitoring, memory, response bias, meta memory