Brain Morphology in Children With Specific Language Impairment

1997 ◽  
Vol 40 (6) ◽  
pp. 1272-1284 ◽  
Author(s):  
Laurie M. Gauger ◽  
Linda J. Lombardino ◽  
Christiana M. Leonard
Keyword(s):  
Left Hemisphere ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Language Skills ◽  
Brain Morphology ◽  
Planum Temporale ◽  
Specific Language ◽  
Normal Language ◽  
Pars Triangularis ◽  
The Right

The planum temporale and pars triangularis have been found to be larger in the left hemisphere than the right in individuals with normal language skills. Brain morphology studies of individuals with developmental language disorders report reversed asymmetry or symmetry of the planum, although the bulk of this research has been completed on adults with dyslexia. Pars triangularis has not been studied in the developmental language impaired population. In this study, magnetic resonance imaging (MRI) was used for quantitative comparisons of the planum temporale (Wernicke’s area) and pars triangularis (Broca’s area) in children with specific language impairment (SLI) and children with normal language skills. The subjects were 11 children with SLI and 19 age- and sex-matched controls between 5.6 and 13.0 years old. Each subject received a neurolinguistic battery of tests and a high resolution volumetric MRI scan. Major results were that (a) pars triangularis was significantly smaller in the left hemisphere of children with SLI, and (b) children with SLI were more likely to have rightward asymmetry of language structures. Furthermore, anomalous morphology in these language areas correlated with depressed language ability. These findings support the hypothesis that language impairment is a consequence of an underlying neurobiological defect in areas of the brain known to subserve language.

Pragmatics and SLI

1993 ◽  
Vol 36 (4) ◽  
pp. 777-789 ◽  
Author(s):  
Holly K. Craig ◽  
Julia L. Evans
Keyword(s):  
Language Impairment ◽  
Specific Language Impairment ◽  
Language Skills ◽  
Receptive Language ◽  
Chronological Age ◽  
Specific Language ◽  
Language Status ◽  
Pragmatic Research ◽  
Normal Language ◽  
Mean Length Of Utterance

Selected discourse behaviors of children with specific language impairment (SU) presenting expressive (E:SLI) or combined expressive-receptive deficits (E-R:SLI) were compared to each other and to chronological age-mates and younger mean length of utterance (MLU)-matched children with normal-language skills. The two SLI subgroups varied from each other on specific measures of tum-taking and cohesion. These findings imply the need for future normative work with SLI subgroups differing in receptive skill, and indicate that, in the interim, pragmatic research with this population will need to consider potential effects of receptive language status when interpreting variations in outcomes for discourse-based variables.

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.

Cognition and Communication

1997 ◽  
Vol 40 (5) ◽  
pp. 964-974 ◽  
Author(s):  
Judith R. Johnston ◽  
Linda B. Smith ◽  
Peggy Box
Keyword(s):  
Content Analysis ◽  
Language Development ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
Object Type ◽  
Attentional Capacity ◽  
Specific Language ◽  
Normal Language

Ten children with specific language impairment and 10 children with normal language development were asked to describe objects so that a listener could select them. Each trial targeted two out of a group of three toys. The targeted objects were identical or were similar in size or color. Children in the two groups did not differ in referential success, although children in both groups found the size items more difficult. Content analysis of the messages did reveal differences in the referential strategies used most frequently. Children with specific language impairment were more likely to mention the attributes of each object separately, rather than to describe the characteristics common to a pair of objects. Children in both groups talked about separate objects more often when talking about size than about color or object type. Use of this strategy could indicate the effects of attentional capacity on children's solutions to communication tasks.

The Influence of Peer Models on the Play Scripts of Children With Specific Language Impairment

1997 ◽  
Vol 40 (1) ◽  
pp. 49-61 ◽  
Author(s):  
Shari Brand Robertson ◽  
Susan Ellis Weismer
Keyword(s):  
Language Impairment ◽  
Specific Language Impairment ◽  
Single Case ◽  
Experimental Treatment ◽  
Control Group ◽  
Control Group Design ◽  
Specific Language ◽  
Peer Modeling ◽  
Normal Language ◽  
Peer Models

This investigation included two phases of inquiry that examined the effects of peer modeling upon the play scripts of children with specific language impairment (SLI). The first study employed a pretest-posttest control group design involving two groups of children with SLI (10 who participated in the experimental treatment and 10 controls) and a group of peer models (10 children with normal language development). The treatment involved dyadic play sessions in which children with SLI were paired with a normal language peer model. Significant differences were found between the play script reports of the experimental (SLI-E) and control groups (SLI-C) of children with specific language impairment. The second study, utilizing single-case methodology, involved 6 children with SLI who participated in the control group of Study 1, plus 2 peer models. Play dyads consisted of either two children with SLI or one child with SLI and a normal language peer. Results of this study provided support for the contention that play interactions with normal language peers facilitates increases in the play-script reports of children with SLI.

The Impact of Emphatic Stress on Novel Word Learning by Children With Specific Language Impairment

1998 ◽  
Vol 41 (6) ◽  
pp. 1444-1458 ◽  
Author(s):  
Susan Ellis Weismer ◽  
Linda J. Hesketh
Keyword(s):  
Language Processing ◽  
Word Learning ◽  
Language Impairment ◽  
Specific Language Impairment ◽  
School Age Children ◽  
Specific Language ◽  
Stress Effects ◽  
Normal Language ◽  
Novel Word Learning ◽  
The Impact

This investigation examined the influence of emphatic stress on children's novel word learning. Forty school-age children participated in this study, including 20 children with specific language impairment (SLI) and 20 children with normal language (NL) development. Results indicated that there were no significant stress effects for comprehension or recognition of novel words (for which all children demonstrated relatively high levels of performance); however, children in both groups exhibited significantly better production of words that had been presented with emphatic stress than with neutral stress. These findings are discussed within a limited capacity framework of language processing.

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