Language Development: Semantics (CH 2) – Study Notes

Language Development

Semantics: Introduction

Semantics is a core area of language development, focusing on how individuals learn and understand the meanings of words. This process is essential for effective communication and cognitive growth in children and adults.

• Definition: Semantic development refers to an individual's learning and knowledge of the meaning of words.

• When encountering a new word, a child must develop an internal representation of:

  • Phonological form: The specific sounds and their order in the word.

  • Grammatical role: The function of the word (e.g., verb, noun, pronoun).

  • Conceptual role: The various contexts in which the word can be used.

• Semantic and syntactic development are closely interrelated.

Semantic Building Blocks

1. Acquiring a Mental Lexicon

The mental lexicon is the collection of words a person understands (receptive) and uses (expressive). It grows rapidly during childhood and continues to expand throughout life.

• Categories of Words in a Lexicon:

  • Specific nominals: Refer to specific objects (e.g., "Daddy", "Fido").

  • General nominals: Refer to all members of a category (e.g., "cat", "dog").

  • Action words: Describe actions (e.g., "up"), social-action games (e.g., "peekaboo"), and action inhibitors (e.g., "no").

  • Modifiers: Describe properties and qualities (e.g., "big", "mine").

  • Personal-social words: Describe affective states and relationships (e.g., "yes", "bye-bye").

• Receptive lexicon (words understood) is typically larger than expressive lexicon (words used).

• Children acquire approximately 860 words per year between ages 1 and 7.

• Vocabulary milestones:

  • 12 months: Several words

  • 24 months: ~300 words

  • Adulthood: ~60,000 words

2. Learning New Words Quickly

Children's ability to learn new words rapidly is influenced by several factors. This process is known as "fast mapping." However, repeated exposure is necessary for full understanding.

• Three factors influencing word learning:

  1. The concept represented by the word (concrete vs. abstract)

  2. Phonological form of the word (sound structure)

  3. Contextual conditions at initial exposure (social and linguistic context)

• Children typically need exposure to a new word at least 17 times to learn it thoroughly.

3. Organizing Words into a Semantic Network

Words are not stored randomly in the brain; they are organized into semantic networks based on relationships and shared features.

• Semantic network: A system in which words are interconnected based on meaning, phonology, and syntax.

• Connections vary in strength:

  • Strong connections: Words with shared syntactic features (e.g., "him" and "her"), phonological features (e.g., "pin" and "pit"), or semantic similarities (e.g., "whale" and "dolphin").

  • Weak connections: Words with fewer shared features.

Influences on Semantic Development

1. Gender

• Girls typically have larger vocabularies than boys in early childhood.

• By age 7, vocabulary size tends to equalize between genders.

2. Language Impairment

• Children with language impairments often have smaller vocabularies.

• They may experience difficulty learning new words and have poorly organized semantic networks.

• Word finding and retrieval are slower and less efficient.

3. Language Exposure

• Children in environments with limited language exposure (e.g., orphanages) tend to have depressed vocabularies.

• Low socioeconomic status is associated with fewer words and reduced vocabulary growth.

The Development of Answering Questions

Stages of Question Answering

Children develop the ability to answer questions in a predictable sequence, reflecting their growing semantic and syntactic skills.

• Early responses may involve pointing or looking at objects.

• Progression to answering "what" and "where" questions.

• Later development includes answering "who", "why", and "how" questions.

• Complex question answering emerges with age and language experience.

Categories in Developmental Order

Children's ability to answer different types of questions follows a developmental sequence, starting with concrete and moving to more abstract categories.

• Concrete object identification

• Action and location questions

• Personal and social questions

• Abstract and inferential questions

Summary Table: Semantic Building Blocks

Building Block	Description	Key Features
Mental Lexicon	Collection of words understood and used	Specific/general nominals, action words, modifiers, personal-social words
Learning New Words	Process of acquiring new vocabulary	Influenced by concept, phonology, context; requires repeated exposure
Semantic Network	Organization of words by relationships	Connections based on meaning, phonology, syntax

Example: A child learning the word "dog" will first recognize its sounds (phonological form), understand it is a noun (grammatical role), and learn that it refers to a furry animal often kept as a pet (conceptual role). Over time, "dog" will be connected to related words like "puppy", "cat", and "pet" in the child's semantic network.

Additional info: Some developmental sequences and vocabulary milestones were inferred and expanded for academic completeness.