Their memory improved, and they persisted more on difficult tasks.

他们的记忆力得到改进，面对困难任务时更有持久力。

哈佛公开课 - 幸福课课程节选

And, in support of the second alternative, even adults find these tasks involving lying and deception more difficult.

即使成年人也会发现,包含谎言与欺骗的任务要更加困难,这支持了第二种观点

耶鲁公开课 - 心理学导论课程节选