![2.1. From Functional Misarticulation to
Optimality Theory
phonological processes as a key player in normal speech sound
development as well as in many cases of speech delay. A
phonological process is a psycholinguistic operation applied to the
underlying representation, the output of which is a surface form.
When a child produces open-syllable forms for words with final
consonants (e.g., [do] for dog, [kᴂ] for cat, [mi] for miss), a process
of final consonant deletion is said to intervene between the (correct)
underlying form and the surface representation.](https://image.slidesharecdn.com/psycho-updated-181014182839/85/Psycholinguistics-Introduction-30-320.jpg)
Psycholinguistics Introduction
- 1. Introduced by: Supervised by : Asst. Prof. Dr. Qassim Obaes Al-Azzawi Hussam Kamel Waleed K. Abdulabbas Azhar Hanoon
- 2. 1. Properties of Spoken Language Production Language comprehension is more difficult to study than language production, because although speech is observable, the ideas that lead to production are more elusive. Researchers have responded to this dilemma by using convergent measures. Some investigators have made detailed and systematic analyses of naturally occurring errors of production, and others have given speakers under laboratory conditions, more or less specific instructions on what to produce(Carrol, 2008:193).
- 3. Production process Language production is divided into three major steps: deciding what to express (conceptualization), determining how to express it ( formulation) expressing it(articulation) ( Levelt, 1989).
- 4. Steps of language production
- 5. Generating : First Phase The simplest utterance consists of a single word. Generating a word begins with specifying its semantic and pragmatic properties. That is, a speaker decides upon an intention or some content to express (e.g., a desired outcome or an observation) and encodes the situational constraints on how the content may be expressed (e.g., polite or informal speech, monolingual or mixing languages. This process, termed conceptualization or message planning, is traditionally considered pre-linguistic and language neutral . The next major stage is formulation, which in turn is divided into a word selection stage and a sound processing stage.
- 6. Process of generation: Second phase Deciding word to use involves selecting a word in one 's vocabulary based on its semantic and pragmatic specifications. Word representation is lemma , lexical entry, lexical representation, and it marks the presence of a word in a speaker’s vocabulary that is capable of expressing particular semantic and pragmatic content within a particular syntactic context. Sound processing, involves constructing phonological form of a selected word by retrieving its individual sounds and organizing them into stressed and unstressed syllables (phonological encoding) and then specifying the motor programs to realize those syllables (phonetic encoding). The final process is articulation, that is, the execution of motor programs to pronounce the sounds of a word.
- 7. Property 1: word selection precedes sound assembly Speakers first focus on meaning and then focus on assembling their sounds. speaker may err in selecting a word but correctly assemble and pronounce its component sounds. speakers produce words first by processing their meaning-level properties, then by processing their sound-level properties. This implies that it is not possible to go from meaning to sounds except through a lexical representation.
- 8. Property 2: The intention to produce a word activates a family of meaning How meaning is represented in models of word production, leads to two major theoretical positions. Decompositional views portray the primitives of semantic representation as being entities that are smaller than the words. Put another, a word is a composite of features e.g., the meaning of bird might include HAS WINGS, HAS FEATHERS, SINGS SONGS, and the like. According to non-decompositional views, the representational bases of words and their meanings bear a one-to-one relationship, so that the word bird is fed by an atomic meaning representation of BIRD, the word airplane is fed by an atomic meaning representation for AIRPLANE, and so forth. These atomic meaning representations are often called lexical concepts.
- 9. Property 3:Words that express similar meanings compete for selection when a speaker attempts to generate the most appropriate word for a particular occasion, other words with very similar meanings in the given context become available and compete for selection as well.
- 10. . Property 4: Competition for selection is constrained by grammatical class and contextual features Models of word production typically invoke different processing mechanisms to impose syntactic constraints on word selection as opposed to semantic constraints. , the competition is limited to words of the same grammatical class. That is, only nouns substitute for nouns, verbs for verbs, and so on.
- 11. . Property 5: The speed and accuracy of selection is affected by meaning-level properties The word is selected and produced are affected by a number of factors related to semantic representations. words with concrete, imaginable meanings such as vampire, wind, and pine have richer semantic representations that guide word selection more efficiently than words with more abstract meanings such as fear, sense, and spirit. Higher imageability or greater concreteness facilitates word translation , generating associations , and word recall.
- 12. Property 6: Attended objects do not necessarily lead to lexical activation word representations might be easily activated based on any strongly associated stimulus in the environment, even objects. For example, seeing a banana might activate the word banana to some extent, even in the absence of any intention to talk about it. In contrast, viewing a semantically related object facilitates production relative to viewing an unrelated object (e.g., viewing a banana and generate apple)
- 13. . Property 7: Selecting words is subject to long- term repetition effects that resemble learning Selecting a word to name an object or express a meaning has long-lasting effects on how easy it is to retrieve that word again to express a similar meaning. expressing the same meaning with the same word should subsequently be more efficient, but expressing a similar meaning with a different word should be more difficult.
- 14. Property 8: Word production can halt part of the way through the process Researchers refer to this as being in a tip-of-the-tongue or TOT state, from the expression “to have a word on the tip of one’s tongue.” TOT states occur most often for people’s names. Some forms of brain damage cause people to experience similar word retrieval problems for common words.
- 15. Property: 9 The selection of some words and morphemes is not primarily driven by meaning. Generating function words and morphemes The production of function words such as articles (a, the) and morphemes such as past tense –ed, however, seems less driven by properties of meaning and highly dependent on the grammatical and phonological properties of accompanying words. For example, in English, the forms of indefinite determiners vary depending on whether they are used with count or mass nouns (e.g., some pasta vs. a noodle). Other evidence also points to an important dissociation between content- and function-word production.
- 16. Assembling the sounds of a word Property 10: The sounds of a word are assembled anew The individual sounds of words are assembled anew each time they are spoken rather than retrieved as intact wholes. One reason that a word’s sounds must be assembled anew each time is due to changes in metrical structure contingent on the accompanying words and inflections. For example, hand vs. hand it. (han –dit)
- 17. Property 11 : Experience strongly affects speed and accuracy of assembling words The sounds that slip tend to be those in the least predictable positions within the language of the speaker. For example, word initial consonants (e.g., /b/ in the word bicycle: /baj.sI.kl/) are less predictable than other consonants that begin syllables in English (e.g., the /s/ and /k/ in bicycle). children tend to learn common words earlier than uncommon words. the impact of frequency and age-of-acquisition is greater in phonological encoding than in word selection.
- 18. Property 12: Aspects of sound assembly proceed sequentially Processing seems to start earlier in time for sounds at the beginning of words than for sounds at the ends. example: an initially overlapping word like tile facilitates naming of a tiger at earlier points in time relative to a word like liar that only overlaps in final sounds.
- 19. Property 13: The effect of similar sounding words is highly situation- dependent. Words that share many sounds with other words take less time to generate than words that are more unusual and appear more likely to be successfully retrieved, but There are situations in which having similar sounding words slows speech or increases the likelihood of errors. The most obvious case of such interference is in tongue twisters such as The sixth sick sheik’s sixth sheep’s sick
- 20. Time course of processes in word production property 14: Semantic competitors activate their sounds Two models are debated : 1- speakers first use activated meaning-level representations to perform word selection and only access sound information after the completion of the selection process. 2- To flow relatively freely among meaning, lexical, and sound representations. • The basic idea is that the more a substituting word resembles an intended word, the less likely a pre-articulatory editing mechanism is to detect the error and prevent it from being uttered.
- 21. Property 15: The scope of message planning is greater than the scope of sound assembly speakers are more likely to pause, repeat words, and say um before articulating complex utterances and clauses than less complex ones. Although speakers seem to know a lot about the message content of an utterance before they begin to speak, they often do not know all of the words they will use to express the message before they begin to articulate the utterance.
- 22. Syntax and Production Syntax allows words to be combined to create unique combinations of meaning. A word such as cat has a particular meaning, but the expressive power of language is enhanced by our ability to create meanings compositionally, by putting words together – for example, our ability to say not a cat or that’s my cat. Consider the model referred to as Bock–Levelt (BL) as shown below
- 23. Level Method of speech production
- 24. The Process of Syntactic For example, for the utterance my cat terrifies the dog next door, the lemmas for CAT, DOG, NEXT, DOOR, and TERRIFY would be retrieved, and CAT would be assigned the role of subject and DOG (modified by NEXT DOOR) the role of object. But notice that a structure such as the dog next door, my cat terrifies him is still possible, because in this form CAT is the grammatical subject and DOG is the object (dog is the object in both the proposed position and in the pronominal form him).
- 25. Evidence for Two-Stage Models evidence for the two-stage model is that if a speaker produces or even simply hears an utterance with a particular structural form, he or she is likely to mimic that structure in a subsequent utterance. Example: The driver showed the mechanic the overalls.
- 26. Is Grammatical Encoding Automatic? This finding suggests that the process of creating syntactic structure is resource-demanding and it might be that grammatical encoding is automatic but semantic processing requires planning and can therefore be resource demanding. Are Some Constructions Difficult to Generate? This question has received surprisingly little attention from experimental psycholinguists. Incremental Production Incrementality is viewed as optimizing the use of processing resources
- 27. Choice of Syntactic Construction speakers tend to begin their sentences with that primed NP. passives tend to occur with theme-experiencer verbs Inclusion of Optional Functional Elements such as: The weary traveler claimed (that) his luggage had been stolen? Syntax and Prosody in Production Utterances have regular rhythmic and tonal properties Consider the sentence If she goes, I go too.
- 28. Section three: Speech disorder psycholinguistics is mainly concerned with the processes underlying the production, perception, and comprehension of language, of which speech is an uncontroversial component. Psycholinguistics has an explanatory rather than a descriptive role in speech disorders post-stroke patient who produces an apparent speech error of replacing a voiceless stop consonant (p, t, or k) with its voiced cognate (b, d, or g) might be said to produce a phonemic not a phonetic error.
- 29. 2. Speech Delay . Residual errors are usually thought to be the consequence of a delay in speech motor maturation. The sounds mentioned above are said to be residual errors because they require the most complex articulatory skill and hence they are mastered relatively late. /r/, /l/, and /s/, salient phonemes that are associated with speech errors.
- 30. 2.1. From Functional Misarticulation to Optimality Theory phonological processes as a key player in normal speech sound development as well as in many cases of speech delay. A phonological process is a psycholinguistic operation applied to the underlying representation, the output of which is a surface form. When a child produces open-syllable forms for words with final consonants (e.g., [do] for dog, [kᴂ] for cat, [mi] for miss), a process of final consonant deletion is said to intervene between the (correct) underlying form and the surface representation.
- 31. Optimality theory Optimality Theory (OT) has taken the place of phonological processes in explaining errors and their treatments in speech delay. OT presents a set of constraints operating between underlying forms (inputs) and surface representations (outputs). The advantage of OT in understanding phonological development and disorders is best exemplified in the way the theoretical apparatus can explain error co-occurrences and their implicational relations. This explanation, in turn, points to a principled selection of treatment targets having the greatest potential for generalization to untreated sounds.
- 32. 2.2. Consistency and Modifiability of Errors: Does the Theoretical Viewpoint Matter? The advantage of OT in understanding phonological development and disorders is best exemplified in the way the theoretical apparatus can explain error co-occurrences and their implicational relations. This explanation, in turn, points to a principled selection of treatment targets having the greatest potential for generalization to untreated sounds.
- 33. 3. Voice onset time VOT and the Voicing Distinction in Speech Disorders VOT is a consistently used measure in the history of speech production research on both normal speakers and speakers with disorders.
- 34. Advantages of VOT Speakers who have degenerative or acquired neurological disease are known to produce voicing errors for stop consonants.
- 35. Functional Neuroimaging of Speech Production fMRI -Functional brain imaging has proven to be a uniquely effective means to study the role of cortical and subcortical brain structures in the production and understanding of language. -It has allowed examination of the regional functional specialization of these phenomena with an accuracy and precision not previously possible with chronometric or electrophysiological techniques. provided a more convenient and completely non-invasive means to study perception, language and action.
- 36. Acoustic Noise Effects in Functional MRI Acoustic noise contamination is an unavoidable consequence of the operation of current MRI devices. Its effects are complex, potentially including stimulus masking, task difficulty modulation, interference with selective attention and reduction in auditory system dynamic range.
- 37. Acoustic Noise Effects in Functional MRI Subject motion relevant to imaging studies involving language and communication can be categorized into three types: (1) rigid-body motion of the head, (2) parenchymal motion of the brain, and (3) motion of the articulators, particularly the jaw.
- 38. Motion Effects in Functional MRI Subject motion relevant to imaging studies involving language and communication can be categorized into three types: (1) rigid- body motion of the head, (2) parenchymal motion of the brain, and (3) motion of the articulators, particularly the jaw.
- 39. Why Require Overt Responses in Language Experiments? If the neural mechanisms of overt and covert speech responses are sufficiently similar, or dissociable by subtractive analysis, it might be possible to assuming that the neural correlates of overt speech production are not unlike those of covert speech except for the associated motor and auditory processes.
- 40. 4.4 Alternative Techniques for Functional MRI One of these approaches is the so-called interleaved acquisition technique which involves acquisition techniques in which task performance and image acquisition are interleaved in time.
- 41. 4.5. Advantages and disadvantages of Interleaved Acquisition Techniques By employing a longer repetition time than customarily used in conventional continuous imaging, interleaved acquisition techniques have potential increased sensitivity to small signal changes, resulting from the improved contrast-to-noise that occurs with longer TR intervals as a result of more fully recovered longitudinal relaxation. the proportion of time spent in performance of the target task is reduced, resulting in a situation in which the subject makes relatively fewer responses during the imaging session than during a continuous acquisition experiment utilizing the same overall run length.