This study investigates the effect of haptic control strategies on a subject's mental engagement during a fine motor handwriting rehabilitation task. The considered control strategies include an error-reduction (ER) and an error-augmentation (EA), which are tested on both dominant and non-dominant hand. A non-invasive brain-computer interface is used to monitor the electroencephalogram (EEG) activities of the subjects and evaluate the subject's mental engagement using the power of multiple frequency bands (theta, alpha, and beta). Statistical analysis of the effect of the control strategy on mental engagement revealed that the choice of the haptic control strategy has a significant effect (p < 0.001) on mental engagement depending on the type of hand (dominant or non-dominant). Among the evaluated strategies, EA is shown to be more mentally engaging when compared with the ER under the non-dominant hand.

翻译：本研究探究了在精细书写康复任务中，触觉控制策略对受试者心理投入的影响。所考虑的控制策略包括误差减少（ER）与误差增强（EA），并在优势手与非优势手上分别进行了测试。采用非侵入式脑机接口监测受试者的脑电图（EEG）活动，并利用多个频段（θ、α、β）的功率来评估受试者的心理投入。关于控制策略对心理投入影响的统计分析表明，触觉控制策略的选择对心理投入具有显著影响（p < 0.001），且该影响取决于手部类型（优势手或非优势手）。在所评估的策略中，与非优势手条件下的ER策略相比，EA策略显示出更高的心理投入水平。