TY - JOUR
T1 - A vocabulary acquisition and usage for late talkers treatment efficacy study
T2 - The effect of input utterance length and identification of responder profiles
AU - Alt, Mary
AU - Figueroa, Cecilia R.
AU - Mettler, Heidi M.
AU - Evans-Reitz, Nora
AU - Erikson, Jessie A.
N1 - Funding Information:
This work was supported by funding from the National Institute on Deafness and Other Communication Disorders Grant 1R01 DC015642-01, awarded to Mary Alt and Elena Plante, for which we are very grateful. We are also thankful for the families who partnered with us on this project. Their dedication to their children’s language development was inspirational. Finally, we thank all of the members of the L4 Lab. You all make our research community fun and functional. We appreciate you.
Publisher Copyright:
© 2021 American Speech-Language-Hearing Association.
PY - 2021/4
Y1 - 2021/4
N2 - Purpose: This study examined the efficacy of the Vocabulary Acquisition and Usage for Late Talkers (VAULT) treatment in a version that manipulated the length of clinician utterance in which a target word was presented (dose length). The study also explored ways to characterize treatment responders versus nonresponders. Method: Nineteen primarily English-speaking late-talking toddlers (aged 24–34 months at treatment onset) received VAULT and were quasirandomly assigned to have target words presented in grammatical utterances matching one of two lengths: brief (four words or fewer) or extended (five words or more). Children were measured on their pre-and posttreatment production of (a) target and control words specific to treatment and (b) words not specific to treatment. Classification and Regression Tree (CART) analysis was used to classify responders versus nonresponders. Results: VAULT was successful as a whole (i.e., treatment effect sizes of greater than 0), with no difference between the brief and extended conditions. Despite the overall significant treatment effect, the treatment was not successful for all participants. CART results (using participants from the current study and a previous iteration of VAULT) provided a dual-node decision tree for classifying treatment responders versus nonresponders. Conclusions: The input-based VAULT treatment protocol is efficacious and offers some flexibility in terms of utterance length. When VAULT works, it works well. The CART decision tree uses pretreatment vocabulary levels and performance in the first two treatment sessions to provide clinicians with promising guidelines for who is likely to be a nonresponder and thus might need a modified treatment plan. Supplemental Material: https://doi.org/10.23641/asha. 14226641.
AB - Purpose: This study examined the efficacy of the Vocabulary Acquisition and Usage for Late Talkers (VAULT) treatment in a version that manipulated the length of clinician utterance in which a target word was presented (dose length). The study also explored ways to characterize treatment responders versus nonresponders. Method: Nineteen primarily English-speaking late-talking toddlers (aged 24–34 months at treatment onset) received VAULT and were quasirandomly assigned to have target words presented in grammatical utterances matching one of two lengths: brief (four words or fewer) or extended (five words or more). Children were measured on their pre-and posttreatment production of (a) target and control words specific to treatment and (b) words not specific to treatment. Classification and Regression Tree (CART) analysis was used to classify responders versus nonresponders. Results: VAULT was successful as a whole (i.e., treatment effect sizes of greater than 0), with no difference between the brief and extended conditions. Despite the overall significant treatment effect, the treatment was not successful for all participants. CART results (using participants from the current study and a previous iteration of VAULT) provided a dual-node decision tree for classifying treatment responders versus nonresponders. Conclusions: The input-based VAULT treatment protocol is efficacious and offers some flexibility in terms of utterance length. When VAULT works, it works well. The CART decision tree uses pretreatment vocabulary levels and performance in the first two treatment sessions to provide clinicians with promising guidelines for who is likely to be a nonresponder and thus might need a modified treatment plan. Supplemental Material: https://doi.org/10.23641/asha. 14226641.
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U2 - 10.1044/2020_JSLHR-20-00525
DO - 10.1044/2020_JSLHR-20-00525
M3 - Article
C2 - 33784467
AN - SCOPUS:85104370168
VL - 64
SP - 1235
EP - 1255
JO - Journal of Speech and Hearing Disorders
JF - Journal of Speech and Hearing Disorders
SN - 1092-4388
IS - 4
ER -