Psycholinguistics and Cognitive Reasoning Principles
Language Fundamentals
- Morpheme: Smallest unit of meaning in language (e.g., “cat,” “un-“).
- Phonemes: Smallest sound units that change meaning (e.g., /p/ vs /b/).
- Semantic content: The meaning of each word.
- Prescriptive rules of grammar: Rules regarding how language should be used.
- Generativity: The ability to produce and understand unlimited new sentences from finite rules and words.
- Phrase-structure: Rules that specify how phrases and sentences are built.
- Categorical perception: Variations in a sound
Fundamentals of NLP: From Tokenization to Semantics
Part-of-Speech Tagging in NLP
Part-of-Speech (POS) Tagging is the process of assigning a specific grammatical category (such as noun, verb, adjective, or adverb) to each word in a text, based on its definition and context. Since many words function as different parts of speech depending on usage (e.g., “book” as a noun vs. a verb), POS tagging is essential for disambiguation.
The Need for POS Tagging
POS tagging serves as a foundational preprocessing step for complex language tasks:
- Word Sense Disambiguation:
Understanding Structure Words and Predicate-Argument Logic
Understanding Structure Words in Linguistics
In linguistics, structure words (also known as function words) serve as the grammatical “glue” that holds a sentence together. Unlike content words (nouns, verbs, adjectives) that carry specific imagery or meaning, structure words establish the relationships between those concepts. They are typically a closed class, meaning new words like “the” or “with” are rarely added to the language, unlike the ever-evolving vocabulary of technology or slang.
Components
Read MoreLanguage Production and Perception Mechanisms
Language Production Stages
This stage transforms the idea into linguistic form, known as Formulation.
a) Grammatical Encoding
- Selection of lemmas (words with syntactic info).
- Assignment of grammatical roles (subject, object).
- Construction of syntactic structure.
- Agreement features (tense, number).
b) Phonological Encoding
- Retrieval of phonological form.
- Syllabification.
- Stress assignment.
- Phoneme ordering.
Articulation
- Motor cortex activates speech muscles.
- Speech is physically produced.
- Highly automated process.
NLP Fundamentals: Morphology, Semantics, and Parsing
Word Structure and Components in NLP
In linguistics and Natural Language Processing (NLP), a structured word (or word structure) refers to how a word is internally organized using meaningful building blocks. Words are not always indivisible; many are formed by combining smaller units called morphemes, which are the smallest units of meaning.
Components of Word Structure
- Root / Base: The core element carrying the primary meaning. Example: play in replay, player, and playful.
- Stem: The form to which affixes
Core Concepts and Challenges in Natural Language Processing
NLP Fundamentals and Key Challenges
Main Challenges in NLP
- Ambiguity: Lexical, syntactic, semantic, and pragmatic complexities.
- Context Understanding: Interpreting meaning based on surrounding text.
- Sarcasm/Irony Detection: Identifying non-literal language use.
- Multilinguality & Low-Resource Languages: Handling diverse languages, especially those with limited data.
Core NLP Definitions
Sentiment Analysis
Sentiment analysis is the process of identifying and classifying opinions or emotions expressed
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