The Sign Language Proficiency Interview for American Sign Language (SLPI:ASL) was developed at the Rochester Institute of Technology, NTID. The SLPI is a one-to-one interview situation between a learner and an interviewer. The interview is video-recorded and will be analysed separately by three raters with the SLPI rating scale. At the end, the three raters have to come up with an agreed rating. More information about the SLPI can be obtained from the RIT website. Some information about how the SLPI:ASL was adapted for Sign Language of the Netherlands (NGT) for use in the teacher/interpreter program at Hogeschool Utrecht, University of Applied Sciences, is also available on the ECML ProSign website. The Dutch adaptation is called NGT Functional Assessment (NFA). See below for further information on the various resources on the NGT version of the SLPI.
NGT Functional Assessment (NFA) Rating Scale
The Sign Language Proficiency Interview (SLPI): Description And Use With Sign Language Of The Netherlands
Preliminary Collaborative Steps in Establishing CEFR Sign Language Levels
Determining aspects of text difficulty for the Sign Language of the Netherlands (NGT) Functional Assessment instrument
SLPI and NFA-adaptation to NGT 2017
The Sign Language Proficiency Interview: description and use with Sign Language of the Netherlands
There are two different examples of vocabulary size tests for Swiss German Sign Language (DSGS): The Yes/No Vocabulary Test which follows a self-report/receptive test method (see Test specifications and video example below) and the Vocabulary Production Test (see Rating Scale and the article to download below).
Receptive vocabulary size test for adult learners of Swiss German Sign Language (DSGS)
Download Excel file
Sign Language Learning and Assessment in German Switzerland: Exploring the Potential of Vocabulary Size Tests for Swiss German Sign Language