During the recovery phase, reliable monitoring of language abilities provides an accurate gauge of patient recovery. Substantial functional disability caused by language impairment features prominently in healthcare decision-making. Reliable identification of acquired language disorders (aphasia) is a core component of healthcare. The test is a reliable measure of language performance for use in clinical practice and research. High reliability estimates and narrow confidence intervals indicated that test ratings vary minimally when administered by clinicians of different experience levels, or different levels of familiarity with the new measure.

The Brisbane Evidence-Based Language Test demonstrated almost perfect inter-rater reliability, intra-rater reliability and internal consistency. The Brisbane Evidence-Based Language Test is a new measure for the assessment of acquired language disorders. Almost perfect correlations between face-to-face and video scoring methods indicate these reliability estimates have direct application to everyday practice.

High correlation coefficients and narrow confidence intervals demonstrated minimal practice effects with scoring or influence of years of clinical experience on test scores. The Brisbane Evidence-Based Language Test demonstrates almost perfect inter-rater reliability, intra-rater reliability and internal consistency.

Reliability in language testing