Research Specific to the LAMP Approach
Bedwani, M., Bruck, S, Costly, D. (2015). “Augmentative and Alternative Communication for Children with Autism Spectrum Disorder: An Evidence-Based Evaluation of the Language Acquisition through Motor Planning Programme." Cogent Education. 2(1). View Research Article
Summary: Eight participants received intervention with the LAMP approach and SGD for five weeks. All of the children had received previous intervention prior to the study (up to 9 years) yet only 25% of them were able to comment at the baseline assessment. At post-program assessment, all subjects showed significant vocabulary increase, all were requesting using a symbolic means of communication (on the device or using spoken language) and 100% of the children were developing social communication through commenting. Other social communication improvements were also observed in gaining attention (75%), expressing feelings (75%) and greetings (87%). All of the children were independently communicating and were not restricted to vocabulary that had been taught to them. 75% of the children were observed to be using phrases on their device by week 5 of implementation and two of the children in the study were observed at the week 9–10 post-program assessment to be using words with multiple meanings in the right context. There were a range of other outcomes that parents, teachers and speech pathologists observed and reported including an increase in joint attention, interest, motivation and engagement with others, an overall increase in willingness to communicate and an overall increase in play and social communication. For some of the children, this was the first time they were able to communicate and participate in social situations. Behavior was also reported to have improved with a corresponding decrease in frustration as a result of improved expressive communication.
Pulliam, M. H. (2010). “The initial and renewed impact of an AAC device, using the LAMP approach, on an individual with autism spectrum disorder.” Master’s thesis. Arkansas State University, Jonesboro, Arkansas. View Research Article
Summary: Case study of a child who used the LAMP approach, then an alternate approach, and the LAMP approach again several years later. Vocabulary increase was only noted during the periods where the LAMP approach was implemented. The same study was published recently in a peer-reviewed journal but they focused on the AAC device rather than the treatment approach.
Neeley, R., Pulliam, M. H., Catt, M., McDaniel, D.M. (2015). “The Impact of Interrupted Use of a Speech Generating Device on the Communication Acts of a Child with Autism Spectrum Disorder: A Case Study.” Education. 9:371-379.
Potts, M. and Satterfield, B. (2013). “Studies in AAC and Autism: The Impact of LAMP as a Therapy Intervention.” Georgia’s Assistive Technology Act Program June 20, 2013. View Research Article
Summary: The seven children in this study, who ranged from age three to seven, had a diagnosis of autism or pervasive developmental disorder-not otherwise specified (PDD-NOS) and complex communication needs (CCN). All seven were diagnosed with expressive-receptive language disorder. Four presented with severe/profound apraxia. Two were found to have dysarthria of speech. Each obtained a speech generating device (SGD) and received LAMP therapeutic intervention. Each child demonstrated communication progress. Language samples from six participants revealed gains as measured by mean length of utterance (MLU) within the first year. Other progress was noted in areas such as enhanced receptive vocabulary, spontaneous use of language, natural vocalization, and in the reduction of difficult behaviors and increase in shared attention.
Findings Were Presented:
Satterfield, B. & Halloran, J., Research Insights into LAMP (Language Acquisition through Motor Planning. Institute Designed for Educating All Students (IDEAS) Conference. (St. Simon’s Island, GA. June, 2013).
Stuart, S. and Ritthaler, C. (2008). “Case Studies of Intermediate Steps/Between AAC Evaluations and Implementation.” Perspectives on Augmentative and Alternative Communication, 17, 150-155. View Research Article
Summary: Informal case studies on two children who began using the LAMP approach with a Vantage SGD with a secondary evaluation/therapy center outside of the schools where they received primary services. Both children showed communication improvement while using the LAMP approach. Difficulties with coordinating services with the primary team and modifications that were made to accommodate the primary team are discussed.
Research Specific to Motor Learning and Speech Generating Devices
Dukhovny, E. "Effect of Size-Centered vs. Location-Centered Grid Design on Aided AAC Productions." Poster session presented at American Speech and Hearing Association Conference; 2015 Nov 12-14; Denver CO.
Summary: Learning of aided AAC displays frequently begins with several large icons, with icon size decreasing as more vocabulary is introduced (“size-centered design”). Another approach introduces small icons from the start, with icon location maintained as new vocabulary is introduced (“location-centered design”). This on-going study compares the effectiveness of these display designs with neurotypical adults. More subjects are needed but location-centered design is trending toward significance for accuracy and speed of access. Findings support using Vocabulary Builder in a complex communication system over providing limited vocabulary in an orientation that will change as language develops.
Dukhovny, E. and Gahl. S. (2014). “Manual motor-plan similarity affects lexical recall on a speech-generating device: implications for AAC users.” Journal of Communication Disorders, 48, 52-60.
Summary: Neurotypical adults were more successful with recall of motor patterns to access words on SGD when the motor patterns for those words were dissimilar indicating that motor patterns play a role in access speed and recall. “This study provides initial support for the use of motor sequences in SGD-based language production….Developing motor plan automaticity is a complementary and, in later stages of device use, possibly more efficient, approach to reducing the cognitive load of production (Grabowski, 2010). If SGD-based production quickly becomes automatic, as the current study suggests, one implication is that, with continued SGD use, location of symbols on a grid becomes more relevant to fluent SGD production than the internal visual characteristics of the symbols. Therefore, in planning SGD design and intervention, location of symbols on the AAC device, and the resulting motor plans for accessing symbols, must be taken into account along with visual considerations.”
References Supporting LAMP Components
Readiness to Learn
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- Adamson, Lauren B.; Bakeman, Roger; Deckner, Deborah F.; and Romski, MaryAnn. (2009). “Joint Engagement and the Emergence of Language in Children with Autism and Down Syndrome.” Journal of Autism and Developmental Disorder. 39(1): 84-96.
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- Kasari, Connie; Paparella, Tanya; Freeman, Stephanny; Jahromi, Laudan B. (2008). “Language outcome in autism: Randomized comparison of joint attention and play interventions.” Journal of Consulting and Clinical Psychology. 76: 125-137.
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- Siller, Michael and Sigman, Marian. “The Behaviors of Parents of Children with Autism Predict the Subsequent Development of Their Children's Communication.” Journal of Autism and Developmental Disorders. 32: 77-89.
Consistent and Unique Motor Plans
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- Keele, Steven W., Matthew Davidson, and Amy Hayes. “Sequential representation and the neural basis of motor skills.” Motor Behavior and Human Skill: a multidisciplinary approach. Jan Piek, ed. Champaign, IL: Human Kinetics. 1998. 3-27.
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- D’Ausilio, Alessandro, Pulvermuller, Friedemann, Salmas, Paola, Bufalari, Ilaria, Begliomini, Chiara, and Fadiga, Luciano. 2009. “The motor somatotopy of speech perception.” Current Biology. 19: 1-5.
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- Schroeder, C. E., Smiley, J., Fu, K. G., McGinnis, T., O’Connell, M. N., and Hackett, T. A. 2003. “Anatomical mechanisms and functional implications of multisensory convergence in early cortical processing.” International Journal of Psychophysiology.” (50). 5-17.
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- Vihman, M. M. and Nakai, S. (2003). “Experimental evidence for an effect of vocal experience on infant speech perception. In Proceedings of the 15th international congress of phonetic sciences (pp. 1017-1020). Barcelona.
- Westermann, Gert and Miranda, Eduardo Reck. 2004. “A new model of sensorimotor coupling in the development of speech.” Brain and Language. (89). 393-400.
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- Zelaznic, Howard N. (1996). Advances in Motor Control and Learning. Champaign, IL: Human Kinetics.