1.4 Dyslexia Indicators, Dysgraphia, & MTSS/RtI Support
Key Takeaways
- Dyslexia is a neurobiological learning disability defined by difficulties in accurate and fluent word reading, decoding, and spelling, typically resulting from a deficit in the phonological component of language.
- Texas law mandates universal dyslexia screening for kindergarten students at the end of the year and for first-grade students by January 31 to identify reading risk early.
- A deficit in Rapid Automatized Naming (RAN) combined with a phonological deficit constitutes a 'double deficit,' producing severe word-level reading failure that requires intensive intervention.
- The Multi-Tiered System of Supports (MTSS) framework organizes instruction into Tier 1 universal core, Tier 2 targeted intervention, and Tier 3 intensive individualized intervention (including evaluation under IDEA or Section 504).
- Accommodations modify how a student accesses grade-level curriculum without altering learning standards (e.g., text-to-speech, extra time), whereas modifications alter and lower the curricular expectations.
1.4 Dyslexia Indicators, Dysgraphia, & MTSS/RtI Support
Neurobiological Definition and Legal Framework
Under Texas Education Code (TEC §38.003), 19 TAC §74.28, and The Dyslexia Handbook (TEA, updated 2021/2024), dyslexia is defined as a specific learning disability of neurobiological origin. Dyslexia is characterized by primary difficulties in:
- Accurate and/or fluent word recognition
- Poor spelling (encoding) abilities
- Poor decoding abilities
These difficulties typically result from a deficit in the phonological component of language that is unexpected in relation to other cognitive abilities and effective classroom instruction.
Secondary Consequences and the Matthew Effect
Without early intervention, decoding deficits trigger severe secondary consequences: depressed comprehension and reduced print exposure. Stanovich (1986) termed this the "Matthew Effect": struggling readers read substantially less, stunting vocabulary growth, background knowledge, and general academic achievement.
Developmental Indicators Across Grade Levels
Early Indicators in Pre-K and Kindergarten
- Delayed expressive speech and persistent articulation errors (e.g., spoonerisms like flutterby for butterfly).
- Difficulty recognizing or producing rhyming words.
- Trouble recognizing letters in one's name and learning letter-sound correspondences.
- Inability to isolate initial sounds in spoken words (e.g., identifying /m/ in mop).
Grade 1 through Grade 3 Indicators
- Difficulty decoding simple phonetically regular CVC words (cat, sun).
- Difficulty recalling common irregular words (said, they).
- Heavy reliance on guessing words from pictures, sentence context, or initial letters.
- Slow, halting oral reading lacking prosody and natural phrasing.
- Phonetically bizarre spelling errors that omit interior phonemes (fsh for fish, bost for boat).
- Avoidance of reading aloud and heightened anxiety.
Rapid Automatized Naming (RAN) and the Double-Deficit Hypothesis
Rapid Automatized Naming (RAN) measures the speed with which a child verbally names repeated visual stimuli (letters, digits, colors, objects), evaluating neurological retrieval automaticity.
Wolf and Bowers (1999) proposed the Double-Deficit Hypothesis:
- Phonological Deficit Only: Core decoding and phonemic difficulties with intact naming speed.
- Naming Speed (RAN) Deficit Only: Accurate but dysfluent decoding and slow orthographic sight-word retrieval.
- Double Deficit: Impairments in both phonological processing and naming speed. These students exhibit the most severe reading difficulties and require intensive, long-term Structured Literacy intervention.
Dysgraphia Characteristics and Manifestations
Defined in The Dyslexia Handbook as a related disorder, dysgraphia is a neurodevelopmental disorder of written expression impairing handwriting legibility, orthographic motor memory, and composition:
- Laborious, illegible handwriting with inconsistent letter sizes and shapes.
- Awkward or painful pencil grip and fatigue during brief writing tasks.
- Difficulty spacing words, staying on baselines, and observing margins.
- Significant spelling deficits due to impaired orthographic memory.
- A marked discrepancy between sophisticated oral expression and sparse written output.
Multi-Tiered System of Supports (MTSS) / Response to Intervention (RtI)
The MTSS framework provides proactive, tiered levels of instructional support:
- Tier 1: Universal Core Instruction (100% of students): High-quality, evidence-based Structured Literacy instruction in general education, meeting the needs of 80–85% of students.
- Tier 2: Targeted Small-Group Intervention (10–15% of students): Supplemental intervention for students below benchmark. Groups of 3–5 students meet 3–4 times weekly for 20–30 minutes, monitored bi-weekly via Curriculum-Based Measurements (CBMs).
- Tier 3: Intensive Individualized Intervention (1–5% of students): Intensive instruction in groups of 1–3 students (or 1-on-1) for 45–60 minutes daily, delivered by a certified dyslexia specialist.
Updated Texas Dyslexia Handbook Alignment (2021/2024)
Texas guidelines ensure that whenever a student is suspected of having dyslexia, the local educational agency must promptly seek parent consent for a comprehensive multidisciplinary evaluation under the Individuals with Disabilities Education Act (IDEA) for Special Education services or under Section 504, preventing delays caused by prolonged MTSS cycling.
Universal Screening Requirements in Texas (TEC §28.006 & §38.003)
Texas mandates universal dyslexia screening for all public school students:
- Kindergarten: Screened at the end of the school year (phonological awareness, letter-sound knowledge, letter naming fluency).
- Grade 1: Screened by January 31 (middle of the school year) (word reading accuracy, phonological awareness, fluency, letter-sound knowledge).
Classroom Accommodations vs. Curricular Modifications
- Accommodations: Alter how a student accesses instruction without altering grade-level curriculum standards or lowering expectations (e.g., text-to-speech, audiobooks, extended time, oral test administration, reduced page density).
- Modifications: Alter what a student is expected to learn by lowering cognitive complexity or standards (e.g., below-grade texts, simplified assignments).
Critical Principle: Students with dyslexia require robust accommodations, not modifications, to maintain access to rigorous grade-level TEKS while circumventing decoding barriers.
MTSS Tiered Continuum of Literacy Support
| Tier Level | Target Population | Setting & Group Size | Frequency & Duration | Progress Monitoring |
|---|---|---|---|---|
| Tier 1: Core | All students (100%) | General classroom (whole/small group) | Daily reading block (90–120 min) | Universal screeners (3x/year) |
| Tier 2: Targeted | At-risk students (10–15%) | Small group (3–5 students) | 3–4 days/week (20–30 min) | Bi-weekly CBM probes |
| Tier 3: Intensive | Significant deficits (1–5%) | Small group (1–3) or 1-on-1 | Daily (45–60 min) | Weekly CBM probes |
Classroom Scenario: Data-Driven Dyslexia Intervention
In January, a first-grade teacher reviews screening data for Marcus:
- Phoneme Segmentation: 10th percentile; Nonsense Word Fluency: 8th percentile; RAN: 12th percentile; Oral Listening Comprehension: 85th percentile.
Marcus exhibits a double-deficit dyslexia profile. The teacher implements immediate action:
- Places Marcus in a Tier 2 small group (3 students) for 30 minutes daily of explicit phoneme-grapheme mapping.
- Monitors progress weekly with CBM nonsense word fluency probes.
- Implements classroom accommodations: oral reading of math tests and text-to-speech for science.
- After six weeks of flat progress, the teacher refers Marcus for an IDEA comprehensive dyslexia evaluation.
Under the Texas Dyslexia Handbook and Texas Education Code §38.003, which factor represents the core cognitive etiology that typically underlies dyslexia?
Which assessment timeline and focus is mandated by Texas state law for universal dyslexia screening in first-grade classrooms?
A fourth-grade student diagnosed with dyslexia understands complex grade-level science and social studies concepts during class discussions but struggles severely when reading the lengthy grade-level textbooks independently. Which instructional support represents an appropriate accommodation rather than a modification?
A student demonstrates severe difficulty with phoneme segmentation and blending, alongside a significant deficit in Rapid Automatized Naming (RAN) tasks (such as rapidly naming letters, numbers, or colors). According to reading research, which condition does this combination indicate, and what is its instructional implication?