Performance at learning and retention.

Mean ± SEM values are given for performance at learning and retention performance on the declarative word paired-associate task and the two procedural tasks, i.e., finger sequence tapping and mirror tracing. Retention is defined by the difference in performance at retrieval testing (morning after sleep) minus performance at immediate recall at learning (evening before sleep). No significant differences between the theta-tDCS and sham conditions were found for performance at learning.**P本研究报告了陈述性词语配对联想任务，以及手指序列敲击、镜像追踪这两项程序性任务的学习表现与保持表现的均值±标准误（Standard Error of the Mean, SEM）。其中，保持表现定义为睡眠后次日清晨的提取测试表现减去学习当晚的即时回忆表现。在学习表现方面，θ经颅直流电刺激（theta-tDCS）组与假刺激（sham）组之间未发现显著差异。**P