Morphological Analysis and Syntactic Parsing in NLP
Word Structure and Morphological Components
The structure of a word is studied under morphology, which analyzes how words are formed and organized using smaller meaningful units. A word consists of morphemes, the smallest units of meaning. These morphemes are classified into two main types:
- Free morphemes: These can stand alone as words, such as “book” or “run.”
- Bound morphemes: These must attach to other morphemes, such as prefixes and suffixes like “un-” or “-ing.”
Words can also be
Read MoreEssential NLP Concepts and Terminology Explained
Fundamental NLP Concepts
- Parsing: The process of analyzing sentence structure using grammar rules to determine syntactic relationships between words.
- N-gram: A contiguous sequence of N words used to predict next-word probabilities in language models.
- Cohesion vs. Coherence: Cohesion refers to the grammatical linking of words, while coherence refers to the logical and meaningful connection across sentences.
- Smoothing: A technique used to adjust probabilities in language models to handle unseen words
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.