In Hong Kong and most Chinese-speaking cities worldwide, the most widely used instruments for cognitive screening in stroke patients traditionally are the Mini Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA). Since these tools were developed geared to evaluating individuals with dementia (MMSE) or mild cognitive impairment (MoCA), they lack specificity and sensitivity in identifying common deficits after stroke, such as aphasia, spatial neglect, apraxia, and reading/writing problems (see also Demeyere et al, 2016). 

 The Cantonese OCS, following the footprint of the original OCS in English, has been designed for the evaluation of stroke patients. It is a clinically-oriented screener that is easy and quick to administer and score. The Cantonese OCS has been shown to be suitable for testing patients in the acute phase at bedside as well as chronic patients. 



The Cantonese OCS was established by an international team led by Dr. Anthony Pak-Hin Kong (Academic Unit of Human Communication, Development, and Information Sciences, University of Hong Kong; 

Other current key team members include: 

  • Dr. Gloria H-Y Wong (Department of Social Work and Social Administration, University of Hong Kong) 
  • Dr. Johnny King-Lam Lau (School of Psychology, University of Birmingham) 

Previous project contributors: 

  • Prof. Brendan Weekes (Professor Emeritus, University of Hong Kong; Visiting Fellow, University of Cambridge) 
  • Dr. Diana Wai-Lam Ho (Former Clinical Associate of the Speech Therapy Unit, Hong Kong Polytechnic University) 




The demonstration video will be added. 


Ongoing Research 

  • Discourse performance and cognitive impairments in stroke patients and people with dementia 
  • Cantonese adaptation of the tablet-based Oxford Cognitive Screen-Plus (OCS-Plus) 
  • Language recovery in a bilingual Cantonese-English speaker with aphasia 
  • Measuring treatment outcome of technology-based aphasia intervention 



  • Kong AP-H, Lam PH-P, Ho DW-L, Lau JK, Humphreys GW, Riddoch MJ, & Weekes B (2016). The Hong Kong version of the Oxford Cognitive Screen (HK-OCS): validation study for Cantonese-speaking chronic stroke survivors. Aging, Neuropsychology, and Cognition, 23(5), 530–548.  
  • Kong APH, Chan J, Lau JKL, Bickerton WL, Weekes B, & Humphreys G (2018). Developing a Cantonese version of Birmingham Cognitive Screen for stroke survivors in Hong Kong. Communication Disorders Quarterly, 39(3), 387-401.  
  • Lam P, Kong AP-H, Ho D, Humphreys G, & Weekes B (2014). Cantonese version of the Oxford Cognitive Screen (OCS): Validation for stroke survivors in Hong Kong. Frontiers in Psychology. doi: 10.3389/conf.fpsyg.2014.64.00005 
  • Pan X, Chen H, Bickerton WL, Lau JK-L, Kong AP-H, Rotshtein P, Guo A, Hu J, & Humphreys GW (2015). Preliminary findings on the reliability and validity of the Cantonese Birmingham Cognitive Screen in patients with acute ischemic stroke. Neuropsychiatric Disease and Treatment, 2015(11), 2377-2390.  
  • Kung HYJ, Kuzmina K, Shendyapina M, & Weekes B (2019). The computerized version of the Hong Kong Oxford Cognitive Screen for dementia (HK-OCSd): Estimates of concurrent validity and reliability. Frontiers in Human Neuroscience. doi: 10.3389/conf.fnhum.2017.223.00007