Using the Baby-Babble-Blanket for infants with motor problems: an empirical study
Harriet J. Fell, Hariklia Delta, Regina Peterson, Linda J. Ferrier, Zebra Mooraj, Megan Valleau · 1994 · Proceedings of the First Annual ACM Conference on Assistive Technologies (Assets '94) · doi:10.1145/191028.191049
Summary
This paper presents the Baby-Babble-Blanket (BBB), a patented assistive device designed for infants with severe motor problems who are at risk of developing learned helplessness due to their inability to control their environment or communicate. The BBB consists of a pressure-sensitive pad (the PowerPad, originally a Nintendo gaming accessory) with 12 switches connected to a Macintosh computer running custom HyperCard software. Infants lying on the pad can activate switches through early-developing movements like head-rolling, leg-lifting, and kicking to trigger digitized sounds — including babbles, words, music, or recordings of familiar voices. The system was developed by an interdisciplinary team from Northeastern University spanning computer science and speech-language pathology. The BBB includes sophisticated data collection capabilities using single-case study experimental design, automatically recording switch activations over time and producing graphical displays of activation patterns. The software supports multiple experimental formats including baseline (no sound), all-sound-bound, all-sound-random, ABA designs, single-switch, and half-and-half configurations, allowing clinicians to systematically evaluate infant responsiveness and cause-and-effect learning.
Key findings
An empirical study was conducted with J.O., a cognitively normal five-month-old infant with club feet, hydrocephalus, and poor muscle tone whose legs had been in casts for his first four months. During baseline sessions (no sound), switch activations were minimal — a mean of 1.13 per minute across five sessions. When the sound of his mother's voice was introduced as a reinforcer in random mode, activations increased dramatically to a mean of 11.75 per minute (range 6.33-18.25), demonstrating Stage 1 cause-and-effect learning (primary circular reaction). More impressively, when the system was configured so only specific switches produced sound, J.O. demonstrated Stage 2 cause-and-effect learning by shifting his movement from one body part to another — switching from head-rolling to leg-raising — in response to which switch was active. This showed he could differentiate and control specific body movements to achieve a desired outcome. The physical therapist noted the increase in movement was therapeutically beneficial, aligning with motor development goals. The system proved usable in a home-based setting, with J.O.'s mother operating the BBB five times per week.
Relevance
This paper addresses a critical gap in assistive technology that persists today: the lack of communication and environmental control devices for the youngest and most severely disabled users. Most AAC and switch-access systems assume users can sit upright and activate a switch with a limb, but many infants and children with severe motor impairments spend most of their time lying down. The BBB's innovation of harnessing early-developing movements like head-rolling from a lying position opened assistive technology access to a population previously underserved. The built-in single-case study methodology is particularly valuable for this heterogeneous population where large group studies are impractical. For practitioners, the paper demonstrates that even very young infants with significant motor impairments can learn cause-and-effect relationships with appropriate technology, arguing strongly for early intervention before learned helplessness becomes entrenched. The use of personally meaningful reinforcers (mother's voice) and the home-based study design offer practical models for family-centered assistive technology deployment.
Tags: early intervention · motor disability · cerebral palsy · infant development · switch access · environmental control · assistive technology · cause and effect · single-case study