For more information about ASL training and evaluation at RIT/NTID, please visit the NSLARC website. The Sign Language Proficiency Interview (SLPI:ASL) Rating Scale is a standard scale for rating sign ...

2. ASL is not a universal language, although it is one of the most common sign languages used across the world. There are more than 300 sign languages used across the world, each with their own ...

It takes an average of 8 or more years to become fluent in American Sign Language (ASL). The proficiency chart below (created by American Council on the Teaching of Foreign Languages) shows levels of ...