Acquired Dyslexia Modeling and Treatment

Conditions

• Dyslexia, Acquired
• Stroke

Eligibility Criteria

Sex

ALL

Age

18 Years - 85 Years

Healthy Volunteers

Not accepted

Interventions

• Phono-Motor Therapy — BEHAVIORAL
  Orthographic stimuli (letters) are introduced from the beginning as each phoneme is being trained. This maintains the focus on phonology, while emphasizing its relevance to reading. PMT consists of an initial phase focused on training of individual phonemes and phoneme sequences in spoken language, followed by written language tasks. English phonemes are first trained in isolation, followed by phoneme sequences in words and pseudowords. They are trained multi-modally through emphasis on auditory, motor, tactile-kinesthetic, visual, and orthographic representations for each consonant and vowel. When sequences are introduced, focus on phonology is maintained by training on pseudowords first before real words are introduced. Participants work on identifying, repeating, parsing, blending, and manipulating phonemes that make up the pseudoword and word stimuli. To maintain focus on phonology, pictures and definitions of the stimuli are never shown or discussed.
• Semantic Feature Analysis — BEHAVIORAL
  SFA activates semantic features of the target word to help retrieve the spoken form of the word. To target reading, a modified SFA is used with written words rather than pictures as the primary materials. Pictures are instead included for each word as a semantic feature. Stimuli will consist of 80 highly imageable nouns with a range of word frequencies. During treatment the therapist will present a written noun and ask the participant a series of questions about the features of that noun. For example, if the presented noun is "juice", the therapist would have the participant select the corresponding picture from an array of pictures. The therapist then would ask, "what do you do with it?" (eliciting a feature from the "function" category) and "where do you store it in your home?" (eliciting a feature from the "context" category). This is done for a total of 6 categories of semantic features. The process is repeated until the participant reads the noun correctly three times in a row.

Study Details

This study is a low-risk, early phase 1, multicenter trial to test the use of a computational (neural network) cognitive model of reading to simulate acquired dyslexia and its treatment. The aim is to determine whether there is an advantage to receiving the treatment the model predicts to be advantageous compared to the alternative treatment. All participants will receive two full rounds of treatment. A round of treatment will consist of either phonomotor treatment (PMT) or semantic feature analysis (SFA) for 60 hours, distributed over 5 days a week for 2 hours a day.

Key Dates

Start date

Dec 3, 2025

Status verified

May 2026

Primary completion

Sep 30, 2026

Completion

Sep 30, 2026

Study Design

Enrollment

12 participants (estimated)

Allocation

NON_RANDOMIZED

Intervention model

CROSSOVER

Primary purpose

TREATMENT

Arms

• Experimental: Model-matched
  This group will receive the therapy, either phonological or semantics-based, that matches the computational model prediction for the source of their reading impairment. They will receive this for the first 60 total hours of therapy, and for the second 60 hours of therapy.
• Active Comparator: Model-non-matched
  This group will receive the therapy, either phonological or semantics-based, that does not match the computational model prediction for the source of their reading impairment. They will receive this for the first 60 total hours of therapy. For the second 60 hours, they will receive the other therapy.

Primary Outcome Measure

Woodcock Reading Mastery Test - III [ Time Frame: Baseline, following the first 60 hours of therapy, and following the final 60 hours of therapy. ]

Central Contacts

• William W Graves, PhD
  973-353-3947
  [email protected]
• Olga Boukrina, PhD
  973-324-3587
  [email protected]

Locations (3)

Find similar trials in Tallahassee, FL

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