CALT Language Development: Typical and Atypical Acquisition — Questions and Answers
Question 1: At what age do most children typically produce their first recognizable words with consistent meaning?
- 6–8 months
- 9–11 months
- 12–18 months (Correct answer)
- 24–30 months
Correct answer: 12–18 months
Most children produce their first true words — consistent phonetic forms attached to specific referents — between 12 and 18 months of age. The 6–11 month range is characterized by babbling (canonical and variegated), and by 9–11 months children use intentional gestures and proto-words, but conventional first words emerge around 12–18 months.
Question 2: Which of the following best describes the 'vocabulary spurt' in typical language development?
- A gradual, steady linear increase in vocabulary from birth through adolescence
- A rapid acceleration in new word learning typically occurring around 18–24 months (Correct answer)
- A sudden vocabulary increase that occurs only when children begin formal reading instruction
- An expansion of vocabulary that occurs primarily in bilingual children during code-switching
Correct answer: A rapid acceleration in new word learning typically occurring around 18–24 months
The vocabulary spurt (also called the word explosion or naming explosion) refers to a rapid acceleration in new word learning — often 8–10 new words per day — that typically begins around 18–24 months. It follows the achievement of approximately a 50-word vocabulary and coincides with growing understanding that everything has a name. It is a universal feature of typical language development, not limited to specific populations.
Question 3: A child who is 7 years old consistently substitutes /w/ for /r/ in all word positions. How should this be interpreted?
- This is a completely typical phonological pattern for a 7-year-old and requires no follow-up
- This substitution pattern warrants concern, as /r/ is typically mastered by age 6–7 (Correct answer)
- This pattern indicates the child has a hearing impairment requiring audiological evaluation
- This pattern is a definitive sign of dyslexia and warrants a reading evaluation
Correct answer: This substitution pattern warrants concern, as /r/ is typically mastered by age 6–7
The phoneme /r/ is among the later-developing sounds and is typically mastered by age 6–7. Consistent substitution of /w/ for /r/ at age 7 exceeds the expected developmental window and warrants referral to a speech-language pathologist for evaluation. While it is not a definitive sign of dyslexia or hearing impairment, it represents a delay in phonological development that should not be dismissed.
Question 4: Morphological awareness — the understanding of how prefixes, suffixes, and base words combine to form meaning — typically develops in what sequence relative to phonological awareness?
- Morphological awareness develops before phonological awareness, around ages 2–3
- Both develop simultaneously during the preschool years
- Morphological awareness develops after phonological awareness, emerging more fully around ages 5–7 and expanding through adolescence (Correct answer)
- Morphological awareness only develops after a child achieves full reading fluency
Correct answer: Morphological awareness develops after phonological awareness, emerging more fully around ages 5–7 and expanding through adolescence
Phonological awareness (sensitivity to the sound structure of language) emerges earlier, with foundational skills such as rhyme and alliteration appearing in the preschool years. Morphological awareness develops later, typically becoming more refined around ages 5–7, and continues to grow throughout the school years as children encounter increasingly complex academic vocabulary. Both are important predictors of reading and spelling success.
Question 5: Rapid Automatized Naming (RAN) deficits in children are most strongly associated with which outcome?
- Social communication difficulties characteristic of autism spectrum disorder
- Difficulties with reading fluency and decoding, frequently co-occurring with dyslexia (Correct answer)
- Expressive language delays affecting grammar and sentence formulation only
- Deficits in mathematical reasoning and working memory
Correct answer: Difficulties with reading fluency and decoding, frequently co-occurring with dyslexia
Rapid Automatized Naming (RAN) measures how quickly a person can name a series of familiar visual stimuli (letters, digits, objects, colors). RAN deficits are robustly associated with reading fluency difficulties and are considered a core cognitive marker of dyslexia, alongside phonological processing deficits. The double-deficit hypothesis (Wolf & Bowers) identifies combined phonological and RAN deficits as predictive of the most severe reading impairments.
Question 6: Which of the following is an early language RED FLAG that should prompt referral for a language evaluation in a toddler?
- Using approximately 50 words at 24 months
- Producing two-word combinations such as 'more milk' at 24 months
- No babbling by 12 months and no single words by 16 months (Correct answer)
- Using mostly nouns with few verbs at 18 months
Correct answer: No babbling by 12 months and no single words by 16 months
Absence of canonical babbling by 12 months and no first words by 16 months are established early red flags for language delay and developmental disorders. These milestones are widely recognized by ASHA and AAP as indicators that warrant immediate referral for speech-language evaluation. Using 50 words by 24 months and two-word combinations by 24 months are within the typical range, and noun-heavy vocabularies at 18 months are developmentally normal.
CALT Language Development: Typical and Atypical Acquisition
At what age do most children typically produce their first recognizable words with consistent meaning?