研究人员注意到,海豚在确定答案时会很着急地按下踏板,但在难度高的测验中则表现出犹豫。
The researcher noted that the dolphin is quite eager to press the paddle when it was sure of the answer, but exhibited hesitation during difficult trials.
最后一组测验的难度水平与最初的一组相似。
The final round of tests was the same difficulty level as the initial test.
学习成效除受呈现方式影响外,还受学习任务和测验任务的难度和被试特征等因素的影响。
The performance in learning is influenced not only by the ways representation, but also by difficulties of tasks and examinations and other factors.
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