Research Overview
Research in the LiLaC Lab focuses on the effects of hearing loss on listening and language skills in school-age children with hearing aids and cochlear implants. The overarching goals of this research are to improve real-world functional outcomes and inform intervention approaches for children with hearing loss. In the LiLaC Lab, we take several approaches to understanding how children with hearing loss process speech, especially under challenging listening conditions. Using eye-tracking technology, we investigate the time course of children’s real-time lexical and semantic activation during spoken word recognition. This allows us to better understand how children with hearing loss utilize specific cognitive processes to understand spoken language. We also use clinical audiologic and language assessments to examine how factors such as auditory access and vocabulary support real-world listening skills. Finally, we are interested in understanding how children’s hearing history and auditory environment influence their ability to effectively learn, process, and understand spoken language. Taken together, our research draws from basic psycholinguistic research methods to address important clinical questions in pediatric audiology.
Latest Research
Current projects:
Longitudinal pediatric outcomes study:
A longitudinal study examining a range of outcomes among a diverse group of children and adolescents with hearing loss.
Technology and early intervention for children with hearing loss have improved tremendously in recent decades. However, we continue to see large variability in children’s long-term outcomes. In this longitudinal study, we are examining outcomes related to speech perception, language, listening-related fatigue, mental health, and quality of life among children and adolescents who are deaf or hard of hearing. Our goal is to identify audiologic, educational, and family- and child-specific factors that support improved outcomes. By including a large and diverse group of children, including children with additional disabilities, children who speak Spanish, and children with hearing loss in only one ear, we will ensure that our findings are relevant to a broad range of children.
Using eye-tracking to assess real-time spoken language processing in children:
A study examining how different types of background noise affect the language processing efficiency of school-age children with hearing aids and children with normal hearing.
Children with and without hearing loss can struggle to understand speech in noisy environments, which may be due in part to negative effects of auditory maskers (i.e., background noise) on children’s speech processing efficiency. In this project, we are characterizing the development of children’s real-time processing efficiency while listening to speech in different types of noise, as well as comparing these processes in children with normal hearing and children with hearing aids. Findings will inform recommendations for classroom noise management, improve our understanding of the mechanisms underlying listening and spoken language difficulties in children with hearing aids, and support the development of clinical interventions supporting complex listening skills in children with hearing loss.
Publications
- Klein KE, Harris LA, Humphrey EL, Noss EC, Sanderson AM, Yeager KR. Predictors of Listening-Related Fatigue in Adolescents With Hearing Loss. Lang Speech Hear Serv Sch. 2024 Jul;55(3):724-740. doi: 10.1044/2024_LSHSS-23-00097. Epub 2024 Mar 19. PubMed PMID: 38501931.
- Jeppsen C, Baxelbaum K, Tomblin B, Klein K, McMurray B. The development of lexical processing: Real-time phonological competition and semantic activation in school age children. Q J Exp Psychol (Hove). 2024 Apr 17;:17470218241244799. doi: 10.1177/17470218241244799. [Epub ahead of print] PubMed PMID: 38508999.
- Klein KE, Walker EA, McMurray B. Delayed Lexical Access and Cascading Effects on Spreading Semantic Activation During Spoken Word Recognition in Children With Hearing Aids and Cochlear Implants: Evidence From Eye-Tracking. Ear Hear. 2023 Mar-Apr 01;44(2):338-357. doi: 10.1097/AUD.0000000000001286. Epub 2022 Oct 18. PubMed PMID: 36253909; PubMed Central PMCID: PMC9957808.
- Hendrickson K, Apfelbaum K, Goodwin C, Blomquist C, Klein K, McMurray B. The profile of real-time competition in spoken and written word recognition: More similar than different. Q J Exp Psychol (Hove). 2022 Sep;75(9):1653-1673. doi: 10.1177/17470218211056842. Epub 2021 Nov 12. PubMed PMID: 34666573.
- Klein KE, Spratford M, Redfern A, Walker EA. Effects of Grade and School Services on Children’s Responsibility for Hearing Aid Care. Am J Audiol. 2019 Sep 13;28(3):673-685. doi: 10.1044/2019_AJA-19-0005. Epub 2019 Aug 20. PubMed PMID: 31430182; PubMed Central PMCID: PMC6808313.
- Walker EA, Kessler D, Klein K, Spratford M, Oleson JJ, Welhaven A, McCreery RW. Time-Gated Word Recognition in Children: Effects of Auditory Access, Age, and Semantic Context. J Speech Lang Hear Res. 2019 Jul 15;62(7):2519-2534. doi: 10.1044/2019_JSLHR-H-18-0407. Epub 2019 Jun 13. PubMed PMID: 31194921; PubMed Central PMCID: PMC6808355.
- Kirby BJ, Spratford M, Klein KE, McCreery RW. Cognitive Abilities Contribute to Spectro-Temporal Discrimination in Children Who Are Hard of Hearing. Ear Hear. 2019 May/Jun;40(3):645-650. doi: 10.1097/AUD.0000000000000645. PubMed PMID: 30130295; PubMed Central PMCID: PMC6383507.
- Klein KE, Walker EA, Tomblin JB. Nonverbal Visual Sequential Learning in Children With Cochlear Implants: Preliminary Findings. Ear Hear. 2019 Jan/Feb;40(1):213-217. doi: 10.1097/AUD.0000000000000564. PubMed PMID: 29547477; PubMed Central PMCID: PMC6139094.
- Klein KE, Wu YH, Stangl E, Bentler RA. Using a Digital Language Processor to Quantify the Auditory Environment and the Effect of Hearing Aids for Adults with Hearing Loss. J Am Acad Audiol. 2018 Apr;29(4):279-291. doi: 10.3766/jaaa.16114. PubMed PMID: 29664722; PubMed Central PMCID: PMC6003626.
- Klein KE, Walker EA, Kirby B, McCreery RW. Vocabulary Facilitates Speech Perception in Children With Hearing Aids. J Speech Lang Hear Res. 2017 Aug 16;60(8):2281-2296. doi: 10.1044/2017_JSLHR-H-16-0086. PubMed PMID: 28738138; PubMed Central PMCID: PMC5829804.
- Klein KE, Wie OB. Long-term predictors of narrative skill in children with early bilateral cochlear implants. European Journal of Special Needs Education. 2015; 30(2):202-219.
Recent Conference Posters
Children’s real-time spoken word recognition while listening in two-talker speech – American Auditory Society Conference, 2024
Lexical-semantic access and organization in children with hearing loss: Evidence from verbal fluency tasks – American Speech-Language-Hearing Association Convention, 2023
Effects of audibility and linguistic complexity on children’s story comprehension – American Auditory Society Conference, 2023
Listening breaks and listening fatigue among adolescents with hearing loss – American Speech-Language-Hearing Association Convention, 2022
Listening fatigue and school accommodations in adolescents with hearing loss – American Auditory Society Conference, 2022