Aphasia, Dysarthria & Cognitive disorder's screenerProduct description

STAD consists of three sections; a verbal test, an articulation test, and a non-verbal test. Each test aims to easily perform the assessment of aphasia, dysarthria, and cognitive impairment. 


The following analysis support psychometric property of the STAD.

Time required

average 9 minutes 48 seconds (4–15 minutes)


internal consistency (Cronbach’s α)

verbal test: 0.90, articulation test: 0.78, non-verbal test: 0.68 

Normative data

1.5 SD (from 222 healthy controls aged over 50 years) 

  • Verbal section 14.8/ 16 
  • Articulation section  6.2/ 7 
  • Non-Verbal section  5.3/ 6

* In the case of a lower score than the above, some abnormality is suspected. 

Materials used

a toothbrush, a medical thermometer, test sheets


  • It is convenient to print pages 1 and 2 of the double-sided test sheets and use the bottom portion of page 2 (below the drawing task) for the writing task.
  • Unlike the verbal test, the articulation test does not allow the distortion of a sound. It means that in scoring the articulation test, it is only when a correct pronunciation is given without distortion of a sound or problem with the speech rate that the answer is marked correct (1 point). The details will be provided later. 
  • Please appropriately discontinue a task that is obviously difficult for a patient considering his/her psychological burden.

The STAD prospect

Heading towards the standardization of the English version of STAD, we will report at conferences and publish research articles. We will also sequentially upload the processes to the above-mentioned website. Please check it continually.


  • STAD does not determine diagnosis of impairment.
  • A qualitative observation that is not reflected by scores is also necessary.
  • The non-verbal test particularly includes a small number of questions (six questions) and a ceiling effect is prone to be seen. Please note that false negative results (although impairment is indeed present, is judged absent by testing) can occur. 

Representative: Kentaro Araki SLP, PhD