Bibliography of Baby Signs Research
For those interested in reading more about the background research concerning the Baby Signsᆴ Program (known in scholarly journals as "symbolic gesturing"), the following articles are recommended. These articles are readily available in libraries.
Susan Goodwyn, Linda Acredolo, and Catherine Brown (2000). Impact of symbolic gesturing on early language development. Journal of Nonverbal Behavior, 24 (2), pp. 81-103. Available online.
Acredolo, L. P., & Goodwyn, S.W. (July 2000). The long-term impact of symbolic gesturing during infancy on IQ at age 8. Paper presented at the meetings of the International Society for Infant Studies, Brighton, UK. Available online.
Brie Moore, Linda Acredolo, & Susan Goodwyn (April 2001). Symbolic gesturing and joint attention: Partners in facilitating verbal development. Paper presented at the Biennial Meetings of the Society for Research in Child Development. Available online.
Linda Acredolo and Susan Goodwyn (1985). Symbolic gesturing in language development: A case study. Human Development, 28, 40-49.
This article presents the story of our first "Baby Signer," Lindas daughter Kate who began to spontaneously create symbolic gestures when she was about 12 months old. These were "sensible" gestures (like sniffing for "flower" and arms-up for "big"). We then made it easy for her by modeling other simple gestures for things in which she was interested and followed her progress in terms of both gestural and verbal development.
Linda Acredolo and Susan Goodwyn (1988). Symbolic gesturing in normal infants. Child Development, 59, 450-466.
Our goal in the two separate studies described in this article was to learn more about the spontaneous development of symbolic gestures by infants. Was Lindas daughter alone in doing so (see Acredolo & Goodwyn, 1985) or were other babies as creative as Kate? The answer was extremely clear. Although Linda was a bit disappointed to learn that Kate was not totally unique, she quickly became excited to see that most babies create at least one or two such symbolic gestures and that some children, like Kate, create many. The article also describes (a) relations with verbal development, (b) the sources of the gestures in the babies everyday lives, (c) and gender and birth order differences.
Linda Acredolo and Susan Goodwyn (1990). The significance of symbolic gesturing for understanding language development. In R. Vasta (Ed.), Annals of Child Development (Vol. 7, pp. 1-42). London: Jessica Kingsley Publishers.
This invited chapter provided an opportunity for us to review the role that symbolic gestures, including formal sign language systems such as ASL, seem to play in the development of verbal language in hearing children. We describe many classic case studies (e.g., Holmes & Holmes, 1980 and Prinz & Prinz, 1979) in addition to our own work and identify common denominators among them. The final discussion addresses the question of whether certain early milestones of language development (e.g., first true symbol, first two symbol combinations) are more easily achieved in the gestural than in the verbal modality.
Susan Goodwyn and Linda Acredolo, (1993). Symbolic gesture versus word: Is there a modality advantage for onset of symbol use? Child Development, 64, 688-701.
The results reported in this article represent some of the earliest findings from our NIH-sponsored longitudinal study of the impact of purposefully encouraging babies to use symbolic gestures. The goal was to shed light on a hotly debated topic: the degree to which gestural symbols represent an easier entr←e into symbolic communication.
Linda Acredolo, L. P., & Goodwyn, S.W. (1997). Furthering our understanding of what humans understand, Human Development, 40, 25-31.
Because we had done so much work in the area of children and symbolic gesturing, we were asked by the editor of this prestigious journal to write an article commenting on the other work presented in the issue wonderful research done at Emory University on the use of gestures by chimpanzees. We were particularly thrilled when a picture of one of our own "Baby Signers" was used for the cover of the issue.
Susan Goodwyn and Linda Acredolo (1998). Encouraging symbolic gestures: Effects on the relationship between gesture and speech. In J. Iverson & S. Goldin-Meadows (Eds.) The nature and functions of gesture in childrens communication (pp. 61-73). San Francisco: Jossey-Bass.
This invited chapter provided an opportunity for us to summarize our program of research on symbolic gesturing, from the earliest work with Kate to the results of our NIH-sponsored longitudinal study of the impact of gesturing on verbal development.
Linda Acredolo, Susan Goodwyn, Karen Horobin, and Yvonne Emmons (1999). The signs and sounds of early language development. In L. Balter & C. Tamis-LeMonda (Eds.), Child Psychology: A Handbook of Contemporary Issues (pp. 116 - 139). New York: Psychology Press.
The editors of this volume asked us to do more than simply summarize our research findings. We were delighted to accept the challenge. Our goal in the chapter was to show how the results of our studies of symbolic gesturing shed light on important and still unresolved questions in language development: Why does comprehension of language generally precede production? Why is vocabulary growth so slow in the months following the first word? What accounts for the frequently observed phenomenon called the "vocabulary spurt?" What developments underlie the beginning of the "two word" stage? In the final section of the chapter we challenge researchers to begin using symbolic gesturing as a tool to explore other important developmental issues, issues that have traditionally had to await the onset of verbal language (e.g., longterm memory for events, concept development, abstract thinking, emotional knowledge). As an added bonus the chapter includes nearly a dozen vignettes drawn from our data and chosen to illustrate the Baby Signsᆴ creativity we've seen babies use over and over. Available Online.
Goodwyn, S.W.,Acredolo, L.P., & Brown, C. (2000). Impact of symbolic gesturing on early language development. Journal of Nonverbal Behavior. 24,81-103.
This is the article in which we present the most important findings from our NIH-sponsored longitudinal study of the impact on verbal development of purposefully encouraging infants to use symbolic gestures. Standardized tests of both receptive and expressive language development had been administered at 11, 15, 19, 24, 30, and 36 months to both an experimental group of babies ("Baby Signers") and two control groups. Results demonstrated a clear advantage for the Baby Signsᆴ babies, thereby laying to rest the most frequently voiced concern of parents that using the Baby Signsᆴ Program might hamper learning to talk. In fact, the good news is that Baby Signsᆴ communication actually facilitates verbal language development.
Acredolo, L. P., & Goodwyn, S.W. (July 2000). The long-term impact of symbolic gesturing during infancy on IQ at age 8. Paper presented at the meetings of the International Society for Infant Studies, Brighton, UK.
The WISC-III was administered to subjects from our NIH-sponsored longitudinal study during the summer following completion of second grade. Much to our surprise and delight, the results indicated a significant 12 point advantage for the children who had been encouraged to use the Baby Signsᆴ Program during their second year of life (Mean IQ = 114) over the children who had been in the Non-Intervention Control Group (Mean IQ= 102). The advantage held for both the Verbal and Performance Sub-scales of the WISC-III.
Brie Moore, Linda Acredolo, & Susan Goodwyn (April 2001). Symbolic gesturing and joint attention: Partners in facilitating verbal development. Paper presented at the Biennial Meetings of the Society for Research in Child Development.
Using video data collected in our federally funded, longitudinal study, we looked to see whether the Baby Signsᆴ experience stimulates development of the ability to actively direct an adult's attention to something in which the baby is interested. Called, "joint attention," this ability is known to be an important contributor to learning to talk. Much to our delight, the Baby Signsᆴ babies were indeed found to engage in more joint attention episodes with their mothers than did non- Baby Signsᆴ babies during laboratory play sessions at 19 and 24 months. Moreover, the effect held independently of linguistic skill, indicating that the Baby Signsᆴ experience itself was a unique contributor to the joint attention scores. These data are important because they help explain why Baby Signsᆴ babies tend to learn to talk earlier than non-Baby Signsᆴ babies. The study may also help explain why the Baby Signsᆴ experience has been found to have a positive effect on IQ at age 8.
This should be enough to get you started with your reading. Plenty of research to access.