Measures of Reliability and Validity of Persian Picture Naming Batte

Different patterns of word retrieval and naming deficits are observed among aphasics and Alzheimer patients in clinical settings. The Persian Object Picture Naming Battery (Nili Pour, 2005) as a clinical linguistic Battery to measure naming deficits in Persian speaking patients was first developed based on the format of Armstrong Naming Battery (Armstrong, 1996) and has been used by clinicians for some time. In this paper we report on measures of reliability and validity of this battery based on the results obtained from Persian speaking aphasic and Alzheimer patients. In this descriptive analytic study, we are reporting on reliability and validity of object Picture Naming Battery based on the data taken from 59 aphasics and 10 Alzheimer patients referred to different clinics. The validity of this battery is reported based on internal consistency and the test retest results. The reliability of the battery and the subtests were also measured. The differential diagnosis of aphasic and Alzheimer patients to different patterns of naming is also reported as another evidence of validity of the battery. Based on the results, the internal consistency of the test was 0.96 and the test re-test correlation coefficient was 0.87 (P>0.01). The correlation between the scores of this battery and naming sub-test of Persian Aphasia Battery (PAB) was 0.58 (P>0.01). Based on the results, Alzheimer patients’ responses to semantic cueing was significantly better than semantic cueing as compared to aphasic patients. The overall results indicate that Persian Picture Naming Battery has appropriate validity and reliability as a clinical tool to measure naming deficits in Persian speaking aphasic and Alzheimer patients. It can also differentiate different patterns of naming deficits in aphasics and Alzheimer patients using phonological and semantic cueing.