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To investigate the psychometric properties of the Test d'Evaluation des Membres Suprieurs de Personnes Agres (TEMPA) for the affected upper extremity in a population of Japanese patients with stroke. A prospective, cross-sectional, single-center study involving 30 patients with stroke was conducted. The inter-rater reliability, the validity, and the internal consistency were assessed. The Fugl-Meyer Assessment (FMA), the Action Research Arm Test (ARAT), the Motor Activity Log, and the Box-and-Block Test were employed for assessing the validity. The English TEMPA instructions were successfully translated in accordance with the accepted principles of translation. The weighted Kappa coefficients for the functional rating scores were 0.87, 0.93, and 0.91 for combined total score, unilateral total score, and bilateral total scores. No statistically significant systematic disagreement was seen in the combined scores. The Spearman's rho values were higher than 0.70 regarding the gold standard tools (the FMA-UE motor domain and the ARAT). The Cronbach's alpha was 0.940 in the functional rating scale and 0.998 in the task analysis scale. The most aspects of the Japanese TEMPA showed acceptable levels of inter-rater reliability and validity in patients with affected upper extremities after stroke. The TEMPA is reliable and valid in measuring activity capacity of upper extremity in patients with stroke. The functional rating score of the TEMPA is recommended to assess activities related to daily living, especially when users need to focus on bimanual activities. The TEMPA may help guide intervention that improve bimanual activity as well as the affected arm activity. [ABSTRACT FROM AUTHOR]