Language Acquisition and Linguistic Development in Childhood

Comprehensive vocabulary flashcards covering linguistic dimensions, language acquisition theories, phonetic/phonological processes, lexical constraints, morphosyntactic development, and pragmatic competence from the lecture notes.

Communication (Comunicación)

Any gesture, sign, behavior, or signal that indicates, transmits, or conveys information between individuals.

Language Capacity (Lenguaje)

The distinct, biologically grounded human faculty to acquire, learn, and utilize a linguistic system.

Language System (Lengua)

A shared, culturally marked tool unique to humans that can be spoken, signed, or written; it is intrinsically intentional, volitional, symbolic, and arbitrary.

Halliday's Language Functions

A functional model proposed by Michael K. Halliday postulating that language structure is conditioned by its functions: instrumental, regulatory, interactional, personal, heuristic, imaginative, and informative.

Competence vs. Performance (Competencia y Actuación)

The distinction between an individual's underlying mental knowledge of a language (competence) and their actual real-time execution or production of it (performance), which can be prone to errors.

Dimensions of Language Analysis (Form, Content, and Use)

The core framework for studying language comprising Form (syntax, morphology, phonology), Content (semantics and lexicon), and Use (pragmatics).

Pragmatics (Pragmática)

The study of how language is used in communicative contexts, examining speaker intentions, communicative goals, and the interaction between linguistic code and real-world communication.

Behaviorist Theory of Language Acquisition (Conductismo)

A theory associated with B.F. Skinner proposing that language is acquired purely through environmental nurture via imitation, repetition, and stimulus-response conditioning (reinforcement and punishment).

Nativist Theory of Language Acquisition (Innatismo)

Noam Chomsky's theoretical paradigm proposing that humans possess an innate Language Acquisition Device (LAD) and Universal Grammar, requiring minimal environmental exposure to trigger pre-wired linguistic structures.

Interactionist Theory (Interaccionismo)

The perspective of Vygotsky and Bruner emphasizing that language develops primarily through social interaction and environmental nurture, supported by adult scaffolding within the Zone of Proximal Development (ZPD).

Constructivist Theory of Language (Piaget & Tomasello)

A cognitive acquisition approach emphasizing general cognition, trial and error, analogy, frequency analysis, and the adaptive mechanisms of assimilation and accommodation.

Perlocutionary Stage (Estadio Perlocutivo)

The early preverbal stage from birth to approximately 8–10 months, where infant behaviors (such as crying and reflexive smiling) affect the caregiver without deliberate communicative intent from the infant.

Illocutionary Stage (Estadio Ilocutivo)

The preverbal developmental period around 8–12 months in which communication becomes deliberate and intentional through non-verbal gestures, such as pointing and vocal play.

Locutionary Stage (Estadio Locutivo)

The developmental phase emerging around 12 months with the production of the first intentional word, uniting communicative intent with conventional linguistic forms.

Critical Period Hypothesis (Eric Lenneberg)

The neurobiological hypothesis proposing that language acquisition occurs with maximum facility until around age 5 to 7, after which biological plasticity progressively declines through puberty (around age 15).

Phonemic Perceptual Narrowing (Embudo Fonológico)

The developmental shift wherein infants discriminate universal phonetic contrasts across all languages between 2 and 6 months, but progressively narrow their sensitivity to native language (L1) contrasts starting at 6 months due to synaptic pruning.

Joint Attention (Atención Conjunta)

The shared focus between infant and caregiver on an external object or event, progressing from caregiver-directed looking (4–6 weeks) to reciprocal gaze, gestures, and referential dialogue by 12 months.

Motherese / Child-Directed Speech (Maternés)

A modified communicative speech register used by adults characterized by higher pitch, exaggerated intonation, and simplified syntax, designed to orient infant attention and establish linguistic mappings.

Pygmalion Effect in Language (Efecto Pigmalión)

A psychological cycle in which adult expectations regarding a child's abilities influence adult communicative behaviors, which shape the child's self-concept and result in actions reinforcing original expectations.

Developmental Language Red Flags (Banderas Rojas)

Clinical warning signs including: no babbling or auditory response at 1–2 years; minimal interaction, absence of words, or regression at 2–3 years; and utterances restricted to two words or severe unintelligibility at 3–4 years.

Phoneme (Fonema)

The minimal abstract phonological unit of sound capable of distinguishing meaning between words within a given language (forming minimal pairs).

Grapheme (Grafema)

The written alphabetic letter or combination of letters representing a phoneme in written language.

Spanish Vowel Triangle (Triángulo Vocálico)

The geometric acoustic/articulatory arrangement of the five Spanish vowels classified by height (high, mid, low) and front-to-back placement (front /i, e/, central /a/, back /o, u/), all of which are voiced.

Consonant Articulatory Features

The three phonetic dimensions used to classify consonants: place of articulation (where), manner of articulation (how the airstream is modified), and voicing (presence or absence of vocal fold vibration).

Spectrogram (Espectrograma)

A visual representation displaying the acoustic frequency of speech sounds in Hertz ($\text{Hz}$) across time in milliseconds ($\text{ms}$).

Word-Level Simplification Processes (Procesos Relativos a la Palabra)

Phonological simplification strategies affecting global word structure, such as CV syllable reduplication, unstressed syllable omission, progressive or regressive assimilation, and phoneme metathesis.

Syllable-Level Simplification Processes (Procesos Relativos a las Sílabas)

Phonological modifications altering internal syllable composition, including initial or final consonant omission, sound inversion, consonant epenthesis, consonant cluster reduction, and diphthong reduction.

Phoneme-Level Substitution Processes (Procesos Relativos a los Fonemas)

Articulatory modifications replacing individual speech sounds, such as stopping of fricatives, spirantization of stops, fronting, backing, devoicing, lisping (ceceo/seseo), and liquid substitutions.

Vocabulary Spurt (Explosión del Vocabulario)

A developmental milestone occurring between 14 and 21 months where lexical acquisition accelerates exponentially after a child acquires approximately 50 productive words.

Lexical vs. Functional Words

Lexical words (nouns, verbs, adjectives, adverbs) possess independent semantic content, whereas functional words (prepositions, conjunctions, determiners) express grammatical relations and have no standalone referents.

Phonological Bootstrapping (Despegue Fonológico)

The child's reliance on acoustic cues—such as sound distribution, syllable structure, rhythm, and prosody—to segment words out of the continuous acoustic speech stream.

Syntactic Bootstrapping (Despegue Sintáctico)

The developmental strategy of utilizing morphosyntactic frames and sentence structures to infer the grammatical category and semantic nature of novel words.

Mutual Exclusivity Principle (Principio de Exclusividad Mutua)

A lexical constraint heuristic assuming that an unfamiliar word refers to an unnamed object rather than to an entity for which the child already possesses a label.

Whole Object Assumption (Pauta de Objeto Completo)

The innate lexical bias leading a child to assume a novel label refers to an entire object rather than to its individual parts, properties, or substance.

Overextension and Underextension (Sobreextensión y Subextensión)

Common lexical errors: overextension applies a word too broadly to other entities sharing perceptual features, while underextension restricts a word excessively to one specific exemplar.

Morphological Overregularization (Sobrerregularización)

A developmental phenomenon showing a U-shaped acquisition curve where a child overapplies productive regular grammatical rules to irregular morphological forms (e.g., producing 'se ha rompido').

Mean Length of Utterance / MLU (Longitud Media del Enunciado - LME)

A standard developmental metric of morphosyntactic complexity calculated by dividing the total number of morphemes or words by the total number of spoken utterances.

Speech Act Components (Componentes de los Actos de Habla)

The tripartite pragmatic division comprising the locutionary act (the linguistic form produced), the illocutionary act (intended communicative force), and the perlocutionary act (the actual effect achieved on the listener).

Direct vs. Indirect Speech Acts

Direct speech acts possess a transparent alignment between linguistic form and intent (e.g., an imperative for an order), while indirect speech acts use non-congruent polite structures whose interpretation requires inferencing.

Theory of Mind in Pragmatic Communication

The cognitive capability developing around 4–5 years to realize that others hold distinct beliefs, mental perspectives, and knowledge, which is essential for understanding indirect requests and providing explicit referents.

Sociolinguistic Competence (Competencia Sociolingüística)

The ability to modulate linguistic register according to the interlocutor, observable when 2–3-year-olds adjust requests between peers and adults, and when 4-year-olds use simplified motherese with younger children.

Narrative Development: Centering vs. Chaining

The progression of children's personal narratives from Centering (ages 2–3, loosely grouping events around a core topic without temporal order) to Chaining (from age 3, organizing linked events chronologically or causally).