Lexical plurality in sign language lexicons

Cross-linguistic studies on lexical plurality have identified a number of inherently plural concepts[1]. Studies on sign languages have shown that the two hands can be used to express plurality, either as a type of morphological alteration[2], or directly in the citation forms of lexical signs[3-5]. Since plurality has been shown to be one important semantic feature associated with two-handed forms, we expect inherently plural concepts to be preferentially two-handed, across sign languages.
Our aim is to examine how these plural concepts are represented in signed language by investigating how a target list of inherently plural concepts is expressed across different sign languages.