Sentence:  The supposed tactual sense of spatial location and orientation in the patient and his <WSD>ability</WSD> to specify the location of a member , as well as the direction and scope of a movement , passively executed ( with one of his members ) , proved to have been , on the contrary , very considerably affected '' . 
Meaning of the word marked with <WSD> tags:  the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment