Adaptation and content validity of the minimal contrasts perception instrument to Chilean Sign Language

Abstract

Purpose to adapt and assess content validity of the the Minimal Contrasts Perception instrument to Chilean sign language (ChSL). Methods this study was conducted in seven stages: stage 1: identification of minimal contrast pairs in sign language. Stage 2: Jugment by four expert judges. Stage 3: Drawings creation. Stage 4: the pairs were assessed by non-expert judges. Stage 5: development of test materials. Stage 6: a video recording of the test stimuli was produced. Stage 7: a pilot study was conducted. Results in Stage 1, 69 minimal contrast pairs were identified. In Stage 2, the judges achieved acceptable agreement rates on 46 (CVR ≥ 0.95; AC1=0.659). After assessing their relevance and presence in children’s vocabulary, the judges selected 29 pairs. This was followed by an assessment of representativeness, which narrowed down the stimuli to 24 pairs. In Stage 3, drawings of the 24 pairs were created. Non-specialist judges in Stage 4 revealed the need for six pairs to be re-drawn. Stages 5 and 6, the illustrations were adjusted, and a video was recorded to display the test instructions. In Stage 7, the pilot sample understood and completed the test successfully. Conclusion the instrument was adapted and displayed adequate content validity.