Reading Outcomes in Children With Vestibular Loss
- Conditions
- Vestibular DisorderHearing Loss, Sensorineural
- Interventions
- Behavioral: Dynamic Visual AcuityBehavioral: Reading OutcomesBehavioral: Static Visual Acuity
- Registration Number
- NCT05414903
- Lead Sponsor
- Father Flanagan's Boys' Home
- Brief Summary
Vestibular loss can co-occur with hearing loss causing dual sensory deficits. This project examines vestibular loss as a contributing factor to reading difficulties for children with hearing loss, where previously only the effects of hearing loss and subsequent language difficulties have been considered. These results are expected to influence the identification and habilitation of vestibular loss in children with hearing loss.
- Detailed Description
Vestibular loss can co-occur with hearing loss causing dual sensory deficits. Unfortunately, children with hearing loss are rarely assessed for vestibular loss. As a result, the impact of co-morbid vestibular loss in children with hearing loss is unknown, particularly on academic and cognitive outcomes. While vestibular loss has been speculated to affect reading outcomes in children (Braswell 2006a; Snashall 1983; Tomaz 2014), the extent to which vestibular loss affects reading outcomes and the association between vestibular loss and reading is not understood. Therefore, the purpose of this proposal is to investigate the relationship between reading outcomes and vestibular loss in children with hearing loss. The vestibular system is responsible for decoding head movement and eliciting eye movements in an equal and opposite direction to maintain steady vision. It is not surprising therefore that vestibular loss results in reduced dynamic visual acuity - the ability to see clearly during head movement - (Rine 2003; Janky 2015); however, children with vestibular loss and reduced dynamic visual acuity also have reduced reading acuity - the smallest print size that can be read - and require larger print size for reading compared to peers with normal hearing (Braswell 2006a). Thus, Aim 1 will test the hypothesis that vestibular loss results in visual acuity deficits due to vestibulo-ocular reflex and cognitive deficits, which could impact reading. Theoretically, the Simple View of Reading (Gough 1986) suggests that reading comprehension can be explained by decoding and language comprehension abilities; however, these two factors do not account for all the variance in reading comprehension (Aaron 1999). In children with hearing loss, reading is affected by language, phonological processing, and auditory access; however, these factors alone do not fully explain the variance. Aim 2 will test the hypothesis that after controlling for variables known to contribute to reading performance (i.e., language, phonological processing, auditory access, etc.), vestibular loss will account for a significant amount of the variance in reading outcomes. The long-term goals of this research program are to define the developmental and academic impact of comorbid vestibular loss and then develop rehabilitative strategies that mitigate negative outcomes. The proposed work will provide a better understanding of vestibular loss as a contributing factor to reading difficulties for children with hearing loss, where previously only the effects of hearing loss have been considered. The proposed work will improve the scientific understanding of reading deficits in children with hearing loss and could lead to new rehabilitative interventions for reading in children with hearing loss by considering vestibular loss, a factor that has until now been ignored. A scaffolded training plan has been devised to enhance the investigator's understanding of literacy outcomes in children with hearing loss, cognition, neuroanatomy, development, and the ability to incorporate eye tracking to address the hypotheses.
Recruitment & Eligibility
- Status
- RECRUITING
- Sex
- All
- Target Recruitment
- 90
- Children will be required to have nonverbal problem-solving/intelligence scores within 1.5 SD of the mean (mean = 100, SD = 15, 1.5 SD of mean = 77 - 123).
- Children with normal hearing must have thresholds ≤20 dB HL from 0.25 to 8 kHz.
- Children with hearing loss must have pure-tone averages > 65 dB HL.
- Fail a vision screen at 20/30
- Have autism, blindness, or other optic disorders, cerebral palsy, significant neurologic involvement, uncorrectable vision problems, and intellectual disability.
- Children with nonverbal problem-solving/intelligence scores > 123 or < 77 will be excluded.
- Each participant's current medications will be reviewed. Children taking medications known to result in oculomotor slowing will be excluded (i.e., anti-depressants, vestibular suppressants, sedatives, etc).
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Children with hearing loss and normal vestibular function Static Visual Acuity Children with hearing loss will have a pure-tone average (PTA) \> 65 dB and normal vestibular evaluation. Children with Normal Hearing Dynamic Visual Acuity typically developing children with normal hearing (thresholds ≤ 20 dB HL from 0.25 to 8 kHz) age-matched to the children with hearing loss Children with Normal Hearing Reading Outcomes typically developing children with normal hearing (thresholds ≤ 20 dB HL from 0.25 to 8 kHz) age-matched to the children with hearing loss Children with hearing loss and normal vestibular function Reading Outcomes Children with hearing loss will have a pure-tone average (PTA) \> 65 dB and normal vestibular evaluation. children with hearing loss and vestibular loss Dynamic Visual Acuity Children with hearing loss will have a pure-tone average (PTA) \> 65 dB and and varying degree of vestibular loss (i.e., unilateral or bilateral). children with hearing loss and vestibular loss Reading Outcomes Children with hearing loss will have a pure-tone average (PTA) \> 65 dB and and varying degree of vestibular loss (i.e., unilateral or bilateral). Children with Normal Hearing Static Visual Acuity typically developing children with normal hearing (thresholds ≤ 20 dB HL from 0.25 to 8 kHz) age-matched to the children with hearing loss Children with hearing loss and normal vestibular function Dynamic Visual Acuity Children with hearing loss will have a pure-tone average (PTA) \> 65 dB and normal vestibular evaluation. children with hearing loss and vestibular loss Static Visual Acuity Children with hearing loss will have a pure-tone average (PTA) \> 65 dB and and varying degree of vestibular loss (i.e., unilateral or bilateral).
- Primary Outcome Measures
Name Time Method Reading Ability June 6, 2022 - November 30, 2026 The Test of Silent Word Reading Fluency, 2nd Ed (TOSWRF) The Test of Silent Contextual Reading Fluency, 2nd Ed (TOSCRF) The Test of Integrated Language and Literacy Skills (TILLS): Reading Comprehension subtest MNREAD Test
The Dynamic Visual Acuity Test June 6, 2022 - November 30, 2026 The dynamic visual acuity test measures the ability to see clearly during head movement. 3 type of head movement will be assessed: Active (participant moves their own head), Passive (Investigator moves participant's head) and impulse (Investigator moves participant's head).
Static Visual Acuity Test June 6, 2022 - November 30, 2026 Static visual acuity will be assessed in 9 domains (3 levels of visual target complexity x 3 levels of presentation complexity). The 3 levels of visual target complexity are identifying: 1) colors, 2) the direction of the open prongs of the "Landolt C" (right, left, up, or down), which does not require alphabet knowledge, and 3) single letters
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Boys Town National Research Hospital
🇺🇸Omaha, Nebraska, United States