The role of phonological storage deficits in specific language impairment: A reconsideration

2006 ◽  
Vol 27 (4) ◽  
pp. 556-562 ◽  
Author(s):  
Susan Ellis Weismer ◽  
Jan Edwards
Keyword(s):  
Language Learning ◽  
Word Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Learning Disorders ◽  
Nonword Repetition ◽  
Language Abilities ◽  
Specific Language ◽  
Adults And Children ◽  
Nonword Processing

In her Keynote Article, Gathercole (2006) presents a theoretical framework intended to account for evidence regarding the relation between nonword repetition and word learning. This framework stems from an impressive amount and breadth of research on this topic, including findings from adults and children with typical language abilities as well as language learning disorders. In this commentary we focus on claims relative to the interpretation of nonword repetition deficits in children with specific language impairment (SLI). One issue we address pertains to the nature of the proposed model of nonword processing and word learning, particularly with respect to phonological sensitivity and storage. The second issue we address relates to the assumption that a phonological storage deficit, although not sufficient, is necessary for SLI.

Nonword repetition and language learning disorders: A developmental contingency framework

2006 ◽  
Vol 27 (4) ◽  
pp. 588-591 ◽  
Author(s):  
Margaret J. Snowling
Keyword(s):  
Language Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Vocabulary Development ◽  
Learning Disorders ◽  
Nonword Repetition ◽  
Specific Language ◽  
Strong Hypothesis ◽  
Development Support ◽  
Laboratory Training

In 1990 Gathercole and Baddeley proposed a strong hypothesis that has generated a wealth of research in the field of language development and disorder. The hypothesis was that phonological memory, as indexed by nonword repetition, is causally related to vocabulary development. Support for the hypothesis came from an impressive range of longitudinal, correlational, and laboratory training studies, and from studies of specific language impairment (SLI). However, more recently, Gathercole, Tiffany, Briscoe, Thorn, and The ALSPAC Team (2005), directly tested the causal hypothesis by following a cohort of children from age 5 to 8 years. Contrary to prediction, children with poor nonword repetition abilities at age 5 had normal vocabulary at the age of 8.

Phonological networks and new word learning

2006 ◽  
Vol 27 (4) ◽  
pp. 581-584 ◽  
Author(s):  
Elisabet Service
Keyword(s):  
Language Learning ◽  
Word Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Short Term Memory ◽  
Nonword Repetition ◽  
Short Term ◽  
Perceptual Analysis ◽  
Motor Processes

The first report of a connection between vocabulary learning and phonological short-term memory was published in 1988 (Baddeley, Papagno, & Vallar, 1988). At that time, both Susan Gathercole and I were involved in longitudinal studies, investigating the relation between nonword repetition and language learning. We both found a connection. Now, almost 20 years later, in her Keynote Gathercole (2006) reviews a multitude of data bearing on the interpretation of this often replicated connection. Her main conclusions are three. First, both nonword repetition and word learning are constrained by the quality of temporary storage. She sees this storage as multiply determined, that is, affected by factors like perceptual analysis, phonological awareness (ability to identify and reflect on the speech sounds that make up words). Second, both nonword repetition and word learning are also affected by sensory, cognitive, and motor processes. Third, an impairment of phonological storage is typically associated with specific language impairment (SLI) but may not be a sole causal factor.

scholarly journals Exemplar Variability Facilitates Retention of Word Learning by Children With Specific Language Impairment

2018 ◽  
Vol 49 (1) ◽  
pp. 72-84 ◽  
Author(s):  
Jessica M. Aguilar ◽  
Elena Plante ◽  
Michelle Sandoval
Keyword(s):  
Language Learning ◽  
Word Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Training Session ◽  
High Variability ◽  
Specific Language ◽  
New Words ◽  
Experimental Training

Purpose Variability in the input plays an important role in language learning. The current study examined the role of object variability for new word learning by preschoolers with specific language impairment (SLI). Method Eighteen 4- and 5-year-old children with SLI were taught 8 new words in 3 short activities over the course of 3 sessions. Half of the children saw 3 identical objects corresponding to each new word during training (No Variability group); the other half of the children saw 3 different objects corresponding to each new word during training (High Variability group). Children completed vocabulary learning tests for objects seen during training and for new within-category objects that were never seen during training as a test of category generalization. Learning was assessed the day after each training activity, and retention was assessed 3 weeks after the last training session. Results There were no group differences on trained or generalization items immediately following training sessions. However, children in the High Variability group demonstrated significantly better retention 3 weeks after experimental training. Conclusion These findings demonstrate that object variability facilitates retention of new word learning by children with SLI. Supplemental Material https://doi.org/10.23641/asha.5583979

Limits to a Left Hemisphere Explanation for Specific Language Impairment

1994 ◽  
Vol 37 (4) ◽  
pp. 824-830 ◽  
Author(s):  
Dorothy M. Aram ◽  
Julie A. Eisele
Keyword(s):  
Language Learning ◽  
Left Hemisphere ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Learning Disorders ◽  
Learning Deficits ◽  
Specific Language ◽  
Language Measures ◽  
Neurologically Intact

The hypothesis of unilateral left hemisphere damage as an explanatory model for the neurological basis of specific language impairment (SLI) does not appear to be sufficient for most children with SLI. Children with unilateral brain lesions have been shown to function significantly lower than their neurologically intact peers on a variety of language measures, yet few of the deficits noted are as persistent or severe as those seen in SLI. In at least two instances, however, language symptomatology following unilateral lesions in children does parallel some types of SLI. The first occurs following subcortical damage to anterior grey and white matter structures that typically results in pronounced language and learning disorders. The second parallel lies in the similar developmental course shared by children with “delayed” language and children with known unilateral lesions, whereby language onset and development is slow in the preschool years but normalizes by school age, with minimal long-term language-learning deficits.

scholarly journals Beyond words: Phonological short-term memory and syntactic impairment in specific language impairment

2006 ◽  
Vol 27 (4) ◽  
pp. 545-547 ◽  
Author(s):  
Dorothy V. M. Bishop
Keyword(s):  
Word Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Short Term Memory ◽  
Molecular Genetic ◽  
Poor Performance ◽  
Nonword Repetition ◽  
Short Term ◽  
Term Memory ◽  
Specific Language

The assessment of nonword repetition in children goes back at least to 1974, when the Goldman–Fristoe–Woodcock Auditory Skills Battery was published, including a subtest (Sound Mimicry) assessing nonword repetition (Goldman, Fristoe, & Woodcock, 1974). Nevertheless, it was not until 20 years later, when Gathercole and Baddeley (1990) reported a study of short-term memory in children with specific language impairment (SLI), that a theoretical framework was developed linking deficits in nonword repetition to impaired language acquisition. Gathercole's Keynote in this issue (2006) tells the story of how this initial study revealed a striking nonword repetition deficit in children with SLI, complementing work on typically developing children showing a major role of phonological short-term memory (STM) in word learning. As she points out, the story is a complex one: phonological STM is not the only skill tapped by the nonword repetition task, and children may do poorly for different reasons. Furthermore, relationships between nonword repetition and word learning may be reciprocal, with vocabulary level affecting children's ability to segment nonwords efficiently and retain them in memory. However, the original finding, that deficient nonword repetition is a strong correlate of SLI, has stood the test of time, to the extent that poor performance on this test has been used successfully as a marker of a heritable phenotype in molecular genetic studies of SLI (Newbury, Monaco, & Bishop, 2005).

Precautions regarding nonword repetition tasks

2006 ◽  
Vol 27 (4) ◽  
pp. 584-587 ◽  
Author(s):  
Bruce Smith
Keyword(s):  
Language Learning ◽  
Language Impairment ◽  
Phonological Processing ◽  
Specific Language Impairment ◽  
Developmental Disorders ◽  
Learning Ability ◽  
Nonword Repetition ◽  
Typically Developing ◽  
Adults And Children ◽  
Lexical Learning

Using nonword repetition tasks as an experimental approach with both adults and children has become quite common in the past 10 to 15 years for studying lexical learning and phonological processing (e.g., Bailey & Hahn, 2001; Gathercole, Frankish, Pickering & Peaker, 1998; Munson, Edwards, & Beckman, 2005; Storkel, 2001; Vitevich & Luce, 2005). In her Keynote, Gathercole (2006) indicates that “The ability to repeat multisyllabic nonwords…probably represents the most effective predictor of language learning ability that is currently known” and that “nonword repetition…may also hold the key to understanding developmental disorders of language learning.” Her Keynote reviews many of the findings from a variety of nonword repetition studies with typically developing children and children with specific language impairment (SLI) or other language-related disorders. Despite the substantial benefits and interesting findings that nonword test paradigms have provided in addressing different issues, a number of questions and precautions should be kept in mind regarding such approaches. Researchers who routinely employ these procedures are likely to be well aware of these issues, and in fact, Gathercole points out some of the limitations. For those less familiar with nonword repetition tasks, it seems advisable to reinforce the need for a certain amount of caution in evaluating the results of such approaches.

Deficits in Explicit Language Problem Solving Rather Than in Implicit Learning in Specific Language Impairment: Evidence From Learning an Artificial Morphological Rule

2019 ◽  
Vol 62 (10) ◽  
pp. 3790-3807 ◽  
Author(s):  
Sara Ferman ◽  
Liat Kishon-Rabin ◽  
Hila Ganot-Budaga ◽  
Avi Karni
Keyword(s):  
Language Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Explicit Knowledge ◽  
Procedural Memory ◽  
Procedural Learning ◽  
Specific Language ◽  
Language Problems ◽  
Morphological Rule ◽  
Semantic Distinction

Purpose The purpose of this study was to delineate differences between children with specific language impairment (SLI), typical age–matched (TAM) children, and typical younger (TY) children in learning and mastering an undisclosed artificial morphological rule (AMR) through exposure and usage. Method Twenty-six participants (eight 10-year-old children with SLI, 8 TAM children, and ten 8-year-old TY children) were trained to master an AMR across multiple training sessions. The AMR required a phonological transformation of verbs depending on a semantic distinction: whether the preceding noun was animate or inanimate. All participants practiced the application of the AMR to repeated and new (generalization) items, via judgment and production tasks. Results The children with SLI derived significantly less benefit from practice than their peers in learning most aspects of the AMR, even exhibiting smaller gains compared to the TY group in some aspects. Children with SLI benefited less than TAM and even TY children from training to judge and produce repeated items of the AMR. Nevertheless, despite a significant disadvantage in baseline performance, the rate at which they mastered the task-specific phonological regularities was as robust as that of their peers. On the other hand, like 8-year-olds, only half of the SLI group succeeded in uncovering the nature of the AMR and, consequently, in generalizing it to new items. Conclusions Children with SLI were able to learn language aspects that rely on implicit, procedural learning, but experienced difficulties in learning aspects that relied on the explicit uncovering of the semantic principle of the AMR. The results suggest that some of the difficulties experienced by children with SLI when learning a complex language regularity cannot be accounted for by a broad, language-related, procedural memory disability. Rather, a deficit—perhaps a developmental delay in the ability to recruit and solve language problems and establish explicit knowledge regarding a language task—can better explain their difficulties in language learning.

Dynamic Temporal Processing of Nonspeech Acoustic Information by Children With Specific Language Impairment

1996 ◽  
Vol 39 (3) ◽  
pp. 510-517 ◽  
Author(s):  
Jane C. Visto ◽  
Jerry L. Cranford ◽  
Rosalind Scudder
Keyword(s):  
Language Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Precedence Effect ◽  
Complex Sound ◽  
Specific Language ◽  
Acoustic Information ◽  
Rapid Changes ◽  
Spectral Components ◽  
Normal Language

The present study investigated whether children with specific language impairment (SLI) differed from children with normal language learning in their ability to process binaural temporal information. The SLI group was matched with peers of the same chronological age, as well as peers with similar language age. All three subject groups were tested with measures of complex sound localization involving the precedence effect phenomenon. Subjects were required to track the apparent motion of a “moving” fused auditory image (FAI). Movement of the FAI was simulated by varying the delay incrementally between pairs of clicks presented, one each, from two matched loudspeakers placed on opposite sides of the child’s head. With this task, the SLI subjects’ performances were found to be similar to their language age-matched but chronologically younger peers. Both groups exhibited tracking skills that were statistically poorer than that of the chronologically age-matched group. Additional tests indicated this effect was not due to differences in motoric tracking abilities nor to the SLI subjects’ abilities to perceive small binaural time cues. Thus, children with SLI appear to be impaired in their ability to use binaural acoustic information in a dynamic ongoing fashion. The requirements for processing such nonlinguistic acoustic information in a “dynamic and ongoing” fashion may be similar to those involved in the ongoing processing of rapid changes in the temporal and spectral components of the speech chain.

scholarly journals Do nonword repetition errors in children with specific language impairment reflect a weakness in an unidentified skill specific to nonword repetition or a deficit in simultaneous processing?

2006 ◽  
Vol 27 (4) ◽  
pp. 569-573 ◽  
Author(s):  
Klara Marton
Keyword(s):  
Language Impairment ◽  
Specific Language Impairment ◽  
Cognitive Abilities ◽  
Alternative Hypothesis ◽  
Nonword Repetition ◽  
Specific Language ◽  
Speech Stimuli ◽  
Simultaneous Processing ◽  
Error Analyses ◽  
Double Deficit

This Commentary supports Gathercole's (2006) proposal on a double deficit in children with specific language impairment (SLI). The author suggests that these children have a limited phonological storage combined with a particular problem of processing novel speech stimuli. According to Gathercole, there are three areas of skill contributing to memory for nonwords: general cognitive abilities, phonological storage, and an unidentified skill specific to nonword repetition. The focus of this Commentary is to examine whether these children's nonword repetition performance is influenced by an unidentified skill or some other processes. An alternative hypothesis is that the nonword repetition errors observed in children with SLI are related to one of their main weaknesses, to their difficulties in simultaneous processing of information. Evidence for this argument comes from our recent studies: from error analyses data and from findings on nonword repetition with stimuli that included meaningful parts (monosyllabic real words).

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