Because sign languages have two main articulators, signers simultaneously experience both possibilities and constraints in the articulation and perception of linguistic messages. Sign languages commonly convey different linguistic units with each hand, and additional information is conveyed in nonmanual signals. Meaningful perseverations (or sign…

This article traces the sources of the estimates of the number of American Sign Language users in the United States. A variety of claims can be found in the literature and on the Internet, some of which have been shown to be unfounded but continue to be cited. In our search for the sources of the various (mis)understandings, we have found that all…

Reviews the book that reports the results of research conducted by Edward Klima, Ursula Bellugi, and others. The book aims to show American Sign Language as a true language and to detail the representational devices that the language employs. A chapter by chapter summary of the reported research is given. (PJM)

Head Thrust is a significant nonmanual signal in American Sign Language (ASL). It occurs on the final sign in a conditional clause, in combination with a brow raise and a rotated head position. The signal is unlike other grammatical signals involving a brow raise. (Author/CB)

The role of verbs in American Sign Language (ASL) is investigated. Verb mutations in ASL are very different from the kinds of grammatical deformations that occur in English, and are different from those that occur in spoken languages as a whole. (HP)

Two experiments questioned whether deaf signers agree on the location of sign boundaries in American Sign Language (ASL), as well as where in time the boundaries are located. Results indicated that the deaf subjects were using linguistic knowledge of ASL when making judgments of the location of sign boundaries. (SL)

Presents three sets of data (signs from the "Dictionary of ASL," 1976; loan signs; and case histories of specific signs) that demonstrate the involvement of the "knuckle-wrist connection" with American Sign Language phonology. (AM)

The historically attested change of two-handed signs on the face to one-handed variants, which occurs in two historically related sign languages, French Sign Language and American Sign Language, is used to test variation theory. The results of the study support viewing languages in a dynamic framework. (AMH)

Examination of American Sign Language--produced by a deaf child acquiring the language from deaf parents, and videotaped at age 13, 15, 18, and 21 months--shows conformity to many of the phonological rules operative for all languages. (Author/CFM)

Reports research on the communicative behavior of a hearing child whose parents communicated with him, from birth, in both signs and words. The child's expressive ability accelerated in both modalities and this is possibly attributable to the addition of the signed component. (PJM)

A study tested the hypothesis that manual encoding aids learning in the prelingually deaf. Twenty-four adults who used fingerspelling as their primary means of communication participated in two groups of a paired-associate learning paradigm, using eight study-test trial sequences. Those using fingerspelling showed more recall and a faster learning…

Systematic sampling was done of signing between five home-reared chimpanzees who had had 4-7 years of complete immersion in integrating their signing interaction into their nonverbal communication. Eight-eight percent of all signs reported fell into the social categories of reassurance, social interaction, and play. (SL)

Analysis of the performance of beginning American Sign Language students, who had only recently learned the manual alphabet, on a task in which proactive interference would build up rapidly on successive trials, supported the view that different languages have separate memory stores. (Author/CB)

Attempts to prove that users of American Sign Language (ASL) do perform within a closed system of manual and nonmanual sign production features (phonemes and distinctive features). Deaf signers are quite capable of creating nonsense words as well as communicating with signers of other languages through pantomime and other paralinguistic features.…

Study indicates that hearing impaired residential students are more proficient users of American Sign Language than are hearing impaired children enrolled in local, public school programs, and older such residential students are more proficient in the language than are younger students. (SL)