The ASL-LEX 2.0 Project: A Database of Lexical and Phonological Properties for 2,723 Signs in American Sign Language.

This is a database description, not a clinical trial, so it does not show that using ASL-LEX improves patient outcomes. Frequency norms come from 129 deaf adults who were college-educated and included native and early-exposed signers, so they may not represent all deaf signers. Sign duration was based on one signer's production, so it may not match how different signers produce signs in conversation. The phonological coding system does not capture every sign feature, and simultaneous morphology such as depicting signs and numerical incorporation is not reflected. The database does not include a representative sample of complex constructions or fingerspelled signs, and it lacks natural context and co-articulation information. Transparency data cover only 430 signs, and deaf iconicity data cover only the original 993 signs, not all 2,723 signs.

The supplied text lists NIH extramural and U.S. government non-PHS research support. It does not include an author conflict-of-interest declaration.

Do not read this as evidence that ASL-LEX-based sign selection improves therapy. The paper describes sign properties and suggests possible clinical uses, but it does not test those uses with patients.