Explores the operational and conceptual meanings of the iconicity of manual signs and sign languages. Empirical studies related to the operational definition of iconicity in American Sign Language are described, and implications of parallels between iconicity and "stimulus meaningfulness" are discussed in relation to the scientific…

Discusses research results that demonstrate that nonlinguistic symbolic deficits of language-impaired children may actually reflect resource allocation constraints and cross-modality deficits. Discusses implications of studies that contrast symbolic action development in normally developing children with that in children with specific language…