In Portugal, the translation and cultural and linguistic adaptation of the SASI v.2.2 was performed (Costa, 2019) and validation was initiated, where the reliability and discriminant and construct validity were studied (Marques, 2020). In the latter, a good internal consistency and interobserver agreement were found. The SASI also proved to be an instrument capable of discriminating between age groups, where six of its domains measure the total SASI score and this total can be used in the Portuguese population. The domain assessing tactile discrimination shows an acceptable reliability, but with a not very high value (Marques, 2020). Based on the different studies carried out where the validity of the SASI was assessed, one of the domains that obtained less significant data was tactile discrimination. This domain of the SASI is composed of three specific tests: stereognosy, tactile stimulus localisation and kinaesthesia. Over the years, several researchers, sensory integration therapists who apply the SASI and the author herself have noticed that the stereognosy test of the SASI was not very sensitive to small variations in children’s performance, and therefore it would have to undergo some changes in order to become more discriminating.
In this sense, the aim of this research is to contribute to improving the discriminative capacity of the stereognosy test of the Screening Assessment of Sensory Integration (SASI) – Research Ed. V.2.2 and as a specific objective to verify the discriminant validity between the stereognosy test of the SASI Research Ed. V.2.2 and the stereognosy test with modifications.