ClinicalTrials.gg
CompletedNCT00624234Updated Jul 8, 2025Results posted

Neurobiology and Treatment of Reading Disability in NF-1

An interventional study of Tutoring Program I and Tutoring Program II in Neurofibromatosis Type 1 and Reading Disabilities, sponsored by Vanderbilt University. Completed at 1 site in United States. Open to participants aged 8 Years to 17 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-07-08.

Sponsored by Vanderbilt University · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 2 years after the study started (first participant enrolled Feb 2006, registered Feb 2008).
Phase
Not applicable
Study type
Interventional
Enrollment
184
Allocation
Randomized
Ages
8 Years to 17 Years
Sex
All
01

Study summary

The goal of this trial is to determine if children with neurofibromatosis type 1 who have reading disabilities respond the same way-both behaviorally and neurobiologically-to specialized treatment programs as children with idiopathic reading disabilities do, and to determine which intervention is best for particular learner profiles.

Read the detailed description

The most common concern of parents of children with neurofibromatosis type 1 (NF-1) is learning disabilities (LD). Approximately one half of all children with NF-1 have LD-the most debilitating and common of which are reading disabilities.

The purpose of this study is to determine if children with NF-1 who have reading disabilities respond the same way-both behaviorally and neurobiologically-to specialized treatment programs known to improve the decoding deficits in children with idiopathic reading disabilities. The trial will also determine which intervention is best for particular learner profiles. The overall purpose of this research is to gain a deeper understanding of the characteristics and treatment of reading disabilities in NF-1.

In the trial, researchers will compare children with NF-1 who show weaknesses in reading to children with reading disabilities of no known cause (idiopathic) using two different interventions and behavioral and neurobiological measures. Both interventions focus on teaching sound-symbol relationships, but vary in terms of relative emphasis on verbal versus visual methods of teaching.

Scientists hope findings from the trial will advance knowledge about the best therapies for LD in children with NF-1. And, by further refining how children with NF-1 who have reading disabilities are similar (or different) to children with idiopathic reading disabilities, the researchers may be able to learn if reading interventions that address areas other than decoding will also benefit children with NF-1. Also, by understanding the similarities and/or differences in the neuropsychological and neurobiological profiles of children with NF-1 who have reading disabilities, and those without, scientists will be able to refine the cognitive phenotype and neurobiological characteristics of NF-1, which will further understanding of central nervous system abnormalities in NF-1.

02

Conditions studied

  • Neurofibromatosis Type 1
  • Reading Disabilities

Keywords

  • neurofibromatosis type 1
  • reading disabilities
  • NF-1
  • learning disabilities
  • tutoring intervention
03

In context

Neurofibromatosis 1

176 studies on the registry are indexed under Neurofibromatosis 1; 43 are open to participants now.

This study's enrollment of 184 is above the median of 35 across 114 interventional studies indexed under Neurofibromatosis 1.

Browse Neurofibromatosis 1 studies →

Lead sponsor

Vanderbilt University is the lead sponsor of 522 studies on the registry; 20 are open to participants now.

Of its 8 completed or terminated interventional studies of FDA-regulated products, 5 (63%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
8 Years to 17 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

This study will be open to all individuals, ages 8 to 17 years, who meet eligibility criteria regardless of race, gender, or socioeconomic status.

  • The Reading Disabilities group (including those with NF-1) is defined by scoring equal to or less than the 25th percentile on measures of basic word reading skills.
  • The Control group (including those with NF1) is defined by scoring equal to or above the 40th percentile on the average of the Letter Word Identification and Word Attack subtests from the WJ-III.

Exclusion criteria

Exclusion Criteria:

Any child, regardless of which group he/she is recruited for, will be excluded if he/she meets any of the following criteria (determined during phone screening, medical review, and during testing):

  • is in foster care;
  • previous diagnosis of mental retardation;
  • known uncorrectable visual impairment;
  • history of known neurological disorder (e.g., epilepsy, spina bifida, cerebral palsy, traumatic brain injury);
  • documented hearing impairment greater than 25 dB loss in either ear;
  • medical to MRI procedures, if participating in MRI (including exposure to metal and pregnancy);
  • individuals known to have an IQ below 70;
  • history or presence of a pervasive developmental disorder;
  • during the DICA-IV parents indicate the presence of any severe psychiatric diagnoses or pervasive developmental disorder.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
184 participants (actual)

Study arms

  • Experimental
    NF-Tutoring Program 1

    Tutoring Program I

    Behavioral: Tutoring Program I

  • Experimental
    NF-Tutoring Program 2

    Tutoring Program II

    Behavioral: Tutoring Program II

  • No intervention
    Typically Developing Readers

    Control group

  • Experimental
    IRD-Tutoring Program 1

    Tutoring Program I

    Behavioral: Tutoring Program I

  • Experimental
    IRD-Tutoring Program 2

    Tutoring Program II

    Behavioral: Tutoring Program II

  • No intervention
    Waitlist Control

    Intervention Control Group (RD)

Interventions

  • BehavioralTutoring Program I

    Tutoring Program I is a structured multi-sensory program that is designed to gradually present the range of sounds and letters with focus on accuracy of phonological concepts and application of those concepts in phrases and sentences. The instruction uses a sequenced defined lesson plan with accuracy and automaticity criteria for skill progression. A range of manipulative and kinesthetic activities is outlined to maintain learner engagement in the intensive intervention design.

  • BehavioralTutoring Program II

    Tutoring Program II is designed to teach visual and speech elements of reading separately at first, and then bring them together for maximum efficiency. The program uses the idea of teaching concepts about the structure of words. For example, students transfer the rules they have learned about one vowel or structure to another without specific instructions on the new one. Tutoring Program II incorporates pictures and activities to help remember strategies for increasing basic reading skills. Speed drills are also used for development of decoding automaticity.

06

What researchers measure

Primary outcomes

  1. Change From Baseline in WJ-III Basic Reading Normative Update (Woodcock Johnson Psychoeducational Battery - 3rd Edition; WJ-III NU) Standard Score at 15 Hours

    This metric measures change in reading abilities, including word recognition and decoding, as assessed by standard educational assessments (Woodcock Johnson Psychoeducational Battery - 3rd Edition Normative Update; WJ-III NU). The scores are reported as change in age-normed standard scores (a change of 15 standard score points would represent a change of 1 standard deviation in the general population).The Basic Reading score is a normed composite of the WJ-III subtests Letter-Word Identification and Word Attack, representing word-level reading skill.

    Time frame: 0 and 15 hours

Secondary outcomes

  1. Neuroimaging Data

    Neuroimaging data consists of functional MRI and structural MRI measures.

    Time frame: Collected before and after intervention

07

Results

Posted Apr 10, 2017
Limitations and caveats
Small sample size; Different group sizes; Random assignment to treatment group (along with small sample size) produced some asymmetry of pretest score by treatment group, such that the NF-Tutoring Program 2 started with a higher group mean score.

Participant flow

Recruitment period was 2006-2012 and was done via NF organizations and NF clinics, as well as the community recruitment.

Participant flow — Overall Study
MilestoneNF-Tutoring Program 1NF-Tutoring Program 2Typically Developing ReadersIRD- Tutoring Program 1IRD-Tutoring Program 2Waitlist Control
Started8926141814
Completed8926141814
Not completed000000

Outcome measures

PrimaryChange From Baseline in WJ-III Basic Reading Normative Update (Woodcock Johnson Psychoeducational Battery - 3rd Edition; WJ-III NU) Standard Score at 15 Hours

This metric measures change in reading abilities, including word recognition and decoding, as assessed by standard educational assessments (Woodcock Johnson Psychoeducational Battery - 3rd Edition Normative Update; WJ-III NU). The scores are reported as change in age-normed standard scores (a change of 15 standard score points would represent a change of 1 standard deviation in the general population).The Basic Reading score is a normed composite of the WJ-III subtests Letter-Word Identification and Word Attack, representing word-level reading skill.

Time frame:
0 and 15 hours
Reported as:
Mean · units on a scale
Change From Baseline in WJ-III Basic Reading Normative Update (Woodcock Johnson Psychoeducational Battery - 3rd Edition; WJ-III NU) Standard Score at 15 Hours
units on a scaleNF-Tutoring Program 1NF-Tutoring Program 2Typically Developing ReadersIRD- Tutoring Program 1IRD-Tutoring Program 2Waitlist Control
Change From Baseline in WJ-III Basic Reading Normative Update (Woodcock Johnson Psychoeducational Battery - 3rd Edition; WJ-III NU) Standard Score at 15 Hours13.50 ± 13.61-1.11 ± 6.94-.115 ± 5.135.86 ± 9.313.06 ± 9.93.143 ± 7.97
SecondaryNeuroimaging Data

Neuroimaging data consists of functional MRI and structural MRI measures.

Time frame:
Collected before and after intervention

Results for this outcome have not been posted.

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
NF-Tutoring Program 1—0/8 (0%)0/8 (0%)
NF-Tutoring Program 2—0/9 (0%)0/9 (0%)
Typically Developing Readers—0/26 (0%)0/26 (0%)
IRD-Tutoring Program 1—0/14 (0%)0/14 (0%)
IRD-Tutoring Program 2—0/18 (0%)0/18 (0%)
Waitlist Control—0/14 (0%)0/14 (0%)

Baseline characteristics

Participants both with and without NF1 were determined by researcher-administered assessments as having Reading Difficulties or typically developing reading skills.

Age, Continuous
Age, Continuous(years)NF-Tutoring Program 1NF-Tutoring Program 2Typically Developing ReadersIRD- Tutoring Program 1IRD-Tutoring Program 2Waitlist ControlTotal
Mean9.62 ± 1.1311.06 ± 1.489.70 ± 1.5310.08 ± 1.6310.33 ± 2.1210.72 ± 2.2510.18 ± 1.79
Sex: Female, Male
Sex: Female, Male(Participants)NF-Tutoring Program 1NF-Tutoring Program 2Typically Developing ReadersIRD- Tutoring Program 1IRD-Tutoring Program 2Waitlist ControlTotal
Female511369337
Male3813891152
Woodcock Johnson Achievement Tests
Woodcock Johnson Achievement Tests(units on a scale)NF-Tutoring Program 1NF-Tutoring Program 2Typically Developing ReadersIRD- Tutoring Program 1IRD-Tutoring Program 2Waitlist ControlTotal
Mean78.25 ± 9.0585.78 ± 7.24103.81 ± 7.4177.57 ± 13.4779.67 ± 9.5979.64 ± 9.6686.88 ± 14.48
08

Study locations

1 site
  • Vanderbilt University, Vanderbilt University Institute of Imaging Science
    Nashville, Tennessee 37232-2310, United States
09

References and documents

Individual participant data

Plan to share: Yes — De-identified behavioral data (Woodcock Johnson-III NU scores) may be shared with other researchers upon request. De-identified T1 structural neuroimaging scans will be shared with other researchers through a neuroimaging data warehouse or consortium.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 8, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00624234
Responsible party
Laura Cutting (Associate Professor, Vanderbilt University) — Principal investigator
First posted
Feb 27, 2008
Start date
Feb 2006
Primary completion
Mar 2013
Completion
Jan 2017
Results posted
Apr 10, 2017
Last update
Jul 8, 2025

Study contacts

Laurie E. Cutting, Ph.D.
principal investigator · Vanderbilt University Special Education Department
Martha Bridge Denckla, M.D.
principal investigator · Kennedy Krieger Institute, Johns Hopkins University, Johns Hopkins University School of Medicine
Sheryl L. Rimrodt, M.D.
principal investigator · Vanderbilt University Pediatrics Department
John Gore, Ph.D.
principal investigator · Vanderbilt University

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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