Ch. 5: Articulatory – Phonological Development & Speech Sound Disorders Flashcards
Articulation Disorder
Refers to speech-motor-control problems.
Phonological Disorder
Refers to the fact that phonology is part of the language system. Children with these disorders have problems that are specific to the knowledge of phonological rules and have faulty phonological representations.
Speech Sound Disorder (SSD)
The presentation of reduced intelligibility due to a combination of speech-motor and phonological factors.
Language
An abstract system of symbols used to communicate meaning. It is larger than speech.
Speech
The actual motor production of oral language.
Articulation Approach
Looks at children’s acquisition of individual phonemes and emphasizes speech-motor control. Viewed as the surface representation or what we produce.
Phonological Approach
Studies children’s acquisition of individual phonemes and the processes underlying such patterns. Viewed as the underlying representation of what we produce.
Phonology
Focuses on the underlying knowledge of the rules of the sound system of a language.
Naturalness
A natural class, process, property, or rule is one that is preferred or frequently used in phonologic systems. One phonological property is more natural than another if the first is used in a greater number of languages and if it develops before the other property.
Unmarked Sounds
Sounds that appear to be natural. They tend to be easier to acquire, and thus are acquired earlier than other sounds. E.g., /b/
Marked Sounds
Less natural sounds that tend to be acquired later. E.g., /th/
Phoneme
The smallest unit of sound that can affect meaning. A class of speech sounds. An abstract name given to variations of a speech sound.
Allophones
Small variations in phoneme sounds. E.g., kitten, bucket, cook
Phonemic
Refers to the abstract system of sounds. E.g., /t/
Phonetic
Refers to concrete productions of specific sounds. E.g., [t]
Vowels
Speech sounds that are always voiced and the mouth is most open. Classified according to the tongue positions needed to produce them (front, central, back, high, mid, low). Also classified according to lip position (rounding vs. retraction).
46
Number of speech sounds in the English language.
Diphthongs
Occur when two vowels are combined. Produced by a continuous change in vocal tract shape.
Distinctive Features Paradigm
Paradigm used to describe vowels and consonants. Believes that the phoneme is not the basic unit of speech. Proposes that a phoneme is a collection of independent features. Uses a binary system. Features are either present or absent (+ or -).
Distinctive Feature
A unique characteristic of a phoneme that distinguishes one phoneme from another.
Place-Voice-Manner Paradigm
Paradigm used to describe consonants.
Place of Articulation
Describes the location of the constriction. Includes: Bilabials, labiodentals, linguadentals, lingua-alveolars, linguapalatals, linguavelars, and glottals.
Voicing
Describes the presence or absence of VF vibrations in the production of consonants.
Manner of Articulation
Describes the degree or type of constriction of the vocal tract. Includes: Stops, fricatives, affricates, glides, liquids, and nasals.
Stops
Produced by completely stopping the airflow. The air pressure is built up in the oral cavity and then released in a manner resembling a small explosion.
Fricatives
Produced by severely constricting the oral cavity and then forcing the air through it, creating a hissing or friction type of noise.
Affricates
A combination of stops and fricatives. Only two English affricates: /ch/ & /dj/
Glides
Produced by gradually changing the shape of the articulators. Only two English glides: /w/ & /j/
Liquids
Produced with the least restriction in the oral cavity. Also called semi-vowels. Only two English liquids: /r/ & /l/
Lateral
In producing this sound, air escapes through the sides of the tongue. Only English lateral: /l/
Nasals
Produced while keeping the VP port open so the sound produced by the larynx passes through the nose. Only three English nasals: /m/, /n/, /ng/
Behavioral Theory of Articulatory-Phonatory Development
Theory of articulatory-phonatory development based on conditioning and learning. Treats the acquisition of speech like the acquisition of any other skill. Thus, it is presumed that the acquisition of speech does not require such special phenomena as innate universals. Emphasizes that the child develops the adult-like speech of his or her community through interactions with the caregiver. The child’s babbling is gradually shaped into adult forms through principles of classical conditioning that occur primarily during caregiver-child interactions. Some experts argue that this theory does not account for an infant’s creativity or capacity to produce new patterns. Evidence is not compelling that caretakers selectively reinforce the child’s sounds in the prelinguistic period.
Structural Theory of Articulatory-Phonatory Development
Theory of articulatory-phonatory development which states that phonological development follows an innate, universal, and hierarchal order of acquisition of distinctive features. The child begins with the maximal contrasts of /p/ and /a/, and differentiates and fine tunes them into more subtle contrasts. Jakobson (1968) stated that babbling was not continuous with early speech, and thus proposed the hypothesis of discontinuity between early babbling and subsequent speech development. There appears to be little support for the idea of discontinuity or for the idea of development of feature contrasts. Because of the variability between individual children, the idea of invariable universals of development is not supported.
Natural Phonology Theory of Articulatory-Phonatory Development
Theory of articulatory-phonatory development which proposes that natural phonological processes are innate processes that simplify the adult target word. Some experts believe that natural phonological processes are innate or are acquired early in life and fairly easily by children. According to Stampe, children learn to suppress processes that do not occur in their languages. Stampe believed that children represent or store speech forms correctly. What leads to the use of phonological processes is output constraints. The concept of the universal or innate status of child phonological processes or rules is controversial. There is no empirical evidence that children have full and accurate perception from the earliest stages of speech production. Natural phonology does not account for “non-natural” simplifications in the speech of children. Many highly unintelligible children produce the sounds of speech in a way that cannot be classified using natural phonology.
Output Constraints
Constraints on production that lead to simplification of the adult model.
Generative Phonology Theory
Theory of articulatory-phonatory development that attempts to explain the sound structure of human languages. Phonological descriptions are dependent on information from other linguistic levels. Phonological rules map underlying representations onto surface pronunciations. This theory has been applied to our understanding of children’s speech acquisition because is enables a description of the relationship of children’s productions to adult pronunciation in terms of phonological rules. Some underlying premises of this theory have been criticized and this theory is not broadly applied in the field of SLP.
Linear Phonology Theories
These theories are based on the premise that all speech segments are arranged in a sequential order that all sound segments have equal value, and that all distinctive features are equal. Thus, no one specific sound segment has control over other segments. Characterized by rules that operate in a domain of linear strings of segments. Assumes that phonological properties are linear strings of segments, and that sound segments are composed of a bundle of independent characteristics or features. Goals of these theories are:
- Describe phonological patterns that occur in natural languages
- Create rules that account for these systems
- Identify universal principles that apply to various phonological systems
Non-Linear Phonology Theories
Theories that explore the relationships among units of different sizes. Developed as an alternative to account for the influence of stress and tone features in levels of representation independent of segmental or linear representation. Deemphasize processes or rules and focus on prosodic phenomena. Assume that there is some sort of hierarchy that helps to organize both segmental and suprasegmental phonological units or properties.
Phonation Stage
Birth – 1 month. Speechlike sounds are rare, and most vocalizations are reflexing (e.g., burping, coughing, crying). Some nonreflexive vowels or syllabic consonants may occur.
Coughing/Gooing Stage
2 – 4 months. Most of the infant’s productions are acoustically similar to /u/. Some velar consonantlike sounds may occur.
Expansion Stage
4 – 6 months. The infant is “playing” with the speech mechanism, exploring his or her capabilities through such productions as growls, squeals, yells, and raspberries (bilabial trills). Some CV-like combinations and vowellike sounds may be produced.
Canonical/Reduplicated Babbling Stage
6 – 8 months. The infant produces strings of CV syllables, such as [mamamama], [dadadada], or [dedededed]. Although the infant does not have sound-meaning correspondence, the timing of the CV syllables approximates that of adult speech. By about 8 months, children with hearing losses fall behind hearing peers in language development.