Phan Thanh

Homework effectiveness has long been a controversial issue for many educators, schools, and parents. Many researchers have tried to prove that homework is not just a nuisance we all have to face throughout the years but really can build character and good for students, like teachers and parents typically say. This bibliometrics review studied 429 documents related to homework in education from the Clarivate Web of Science from 1977 to 2020. This study aims to record the volume, growth pattern of homework literature and identify critical authors, publications, and topics of this knowledge base. The review found that the homework literature has grown remarkably over the past 43 years, with the most cited authors are from the US, Germany, and Portugal. Using co-citation, co-occurrence and bibliographic coupling analysis from the VOSviewer program, this research also indicated significant results and suggestions for future research. The findings showed that homework literature increased gradually in volume, with the most publications originated in the USA, and critical authors were Cooper, Xu, and Trautwein. Additionally, five common research topics were illustrated, namely the effect of homework and its measurement, homework environment, homework tasks and feedback, family involvement in homework, and time and effort.

Despite its importance, abnormal interactions between the proximal and distal upper extremity muscles of stroke survivors and their impact on functional task performance has not been well described, due in part to the complexity of upper extremity tasks. In this pilot study, we elucidated proximal–distal interactions and their functional impact on stroke survivors by quantitatively delineating how hand and arm movements affect each other across different phases of functional task performance, and how these interactions are influenced by stroke. Fourteen subjects, including nine chronic stroke survivors and five neurologically-intact subjects participated in an experiment involving transport and release of cylindrical objects between locations requiring distinct proximal kinematics. Distal kinematics of stroke survivors, particularly hand opening, were significantly affected by the proximal kinematics, as the hand aperture decreased and the duration of hand opening increased at the locations that requires shoulder abduction and elbow extension. Cocontraction of the extrinsic hand muscles of stroke survivors significantly increased at these locations, where an increase in the intermuscular coherence between distal and proximal muscles was observed. Proximal kinematics of stroke survivors was also affected by the finger extension, but the cocontraction of their proximal muscles did not significantly increase, suggesting the changes in the proximal kinematics were made voluntarily. Our results showed significant proximal-to-distal interactions between finger extension and elbow extension/shoulder abduction of stroke survivors exist during their functional movements. Increased cocontraction of the hand muscles due to increased neural couplings between the distal and proximal muscles appears to be the underlying mechanism.