METHODS Every subject (n=8) was tes-ted with a standard aural oddball paradigm to obtain ERP P 300. They were tested at 5 timepoints (7:00, 12:00, 16:00, 20:00, 0:00) per day in 5 days with an interval of at least 1 wk between 2 test days.

• 方法 8名被试者在非连续的 5 d的实验中每天在 5个时间点 (7:0 0 ；12 :0 0 ；16 :0 0 ；2 0 :0 0和 0 :0 0 )重复相同的听觉 Oddball模式测试以诱发脑事件相关电位(ERP) .