Psychometric Properties of the Chinese (Putonghua) Version of the Oxford Cognitive Screen (OCS-P) in Subacute Poststroke Patients without Neglect

Table 3

Difficulty levels, discriminative indices (item-total correlations), and internal consistency (Cronbach’s alpha) of the OCS-P subscales according to attention, memory, and language dimensions.

OCS-P subscales; ()	Difficulty level	Discriminative index	Internal consistency; (Cronbach’s alpha)
Visual Field Test	0.97	−0.72	-
Broken Hearts Test	0.85	0.32	-
Executive Task	0.65	0.31	-
Attention Dimension			0.30
Orientation	0.87	0.46	-
Delayed Recall & Recognition	0.76	0.46	-
Memory Dimension			0.52
Semantics	0.93	0.34	-
Sentence Reading	0.81	0.66	-
Picture Naming	0.59	0.64	-
Language Dimension			0.44
Numerical Cognition	0.77	NA	-
Praxis	0.75	NA	-

Note. Difficulty level means patients’ scores on the subscale divided by the maximum subscale score. The three test dimensions are attention, memory, and language. Discriminative index (item-total correlation) was correlation between the subscale score and the total score of the dimension. “NA” means not applicable because the subscale score is the same as the dimension score.