In this example, the answer would have been "sweet”.

在这个例子中，正确答案应该是“sweet（甜蜜）”这个词。

Participants were tested once in the morning and then given the same task again in the afternoon. In between, some were allowed a nap with REM sleep, some a nap without REM sleep, while the others had a quiet rest period.

参与者在早上和下午各进行了同样的测试。而在两次测试的中间，一些人进行了短暂的快速眼动睡眠；一些人虽然小睡但并未进入快速眼动睡眠状态；还有一部分人只是安静地休息了一会儿。