412Aphasia and dysphasia test batteries are frequently devised by the clinician and cover the following simple tasks:

412     Aphasia and dysphasia test batteries are frequently devised by the clinician and cover the following simple tasks:

a)      listening to spontaneous speech or responses to simple questions;

b)      pointing commands and questions that can be answered ‘yes’ or ‘no’ to test comprehension;

c)       repeating words and phrases;

d)      naming objects that have high-and-low frequency use;

e)      reading comprehension and reading aloud (reading is related to educational achievement, which must be known before interpreting reading comprehension and reading aloud results); and

f)        writing and spelling.

413     If comprehension is relatively intact, the aphasia screening battery may be adequate to place an individual in class 1 or 2. However, individuals with dysphasia may score poorly on aphasia and dysphasia test batteries while they demonstrate communicative competency for activities of daily living. This communicative competency may be measured by means of the communicative abilities in daily living (CADL), in which non verbal communication is assessed. Table 12.3: Criteria for rating impairment due to aphasia or dysphasia describes the criteria for rating impairment due to aphasia or dysphasia.

Table 12.3: Criteria for rating impairment due to aphasia or dysphasia

| 5 | Minimal disturbance in comprehension and production of language symbols of daily living. | | 10 | Moderate impairment in comprehension and production of language symbols of daily living. | | 32 | Able to comprehend non verbal communication; production of unintelligible or inappropriate language for daily activities. | | 50 | Complete inability to communicate or comprehend language symbols. |

12.4   Emotional or behavioural impairments

414     Emotional or behavioural disorders resulting from verifiable neurological impairments (for example, stroke or head injury) are assessed under Table 12.4: Emotional or behavioural impairments.

415     Psychiatric impairments without documented neurological origin are assessed under Chapter 5 – Psychiatric conditions. They are not assessed under Table 12.4: Emotional or behavioural impairments.