Behind mathematical learning disabilities: What about visual perception and motor skills?

In a sample of 39 children with mathematical learning disabilities (MLD) and 106 typically developing controls belonging to three control groups of three different ages, we found that visual perception, motor skills and visual-motor integration explained a substantial proportion of the variance in either number fact retrieval or procedural calculation. Furthermore, children with MLD performed significantly worse on visual perception, motor skills and visual-motor integration in comparison with age-matched control children. A mild developmental delay in visual perception, visual-motor integration and (fine) motor coordination and a severe delay in motor skills were found in children with MLD. However, not all children with MLD have problems on these domains. They seem to be a heterogeneous group, not only with respect to their mathematical profile but also with respect to their visual perceptual, motor and visual-motor integration skills. Diagnostic implications are discussed.     

Mental flexibility and planning skills in children and adolescents with learning disabilities.

Mental flexibility (skill with shifting response set) and visual planning skills were examined with a group of 60 children and adolescents with learning disabilities. The sample consisted of 44 boys and 16 girls with an age range of 9 to 15. Scores from the Trail Making Test and the Wisconsin Card Sorting Test were cluster-analyzed and subgroups were formulated. The results of the cluster analysis indicated a two-group solution to be most appropriate. One subtype was clearly dysfunctional on the classifying variables, while the other subgroup approached average levels. The two subtypes were compared on measures of intellectual functions, academic skills, auditory memory, visual memory, visual-motor integration, motor speed, and tactile integration. Significance was found on several different tests. The results are discussed in terms of potential cortical dysfunction evidenced by the subgroups.     

Developmental skills of advantaged and disadvantaged children on perceptual tasks

The Bender Visual-Motor Gestalt Test (BVMGT), Rutgers Drawing Test (RDT), Memory-for-Designs (M-F-D), a visuo-spatial memory test (Bannatyne, 1968), and selected motor tasks (Bannatyne, 1965) were administered to 155 advantaged and disadvantaged children. First- and second-grade advantaged children were superior on all of the visual-motor, visual-motor memory, and visual memory, and visual memory tasks. On the motor tasks, first-grade advantaged children were superior on Gross Rhythm (p < .01), and Throws (p < .01). Second-grade advantaged children were superior on Crosses (p < .01), and Throws (p < .01). Disadvantaged first- and second-graders, however, were superior on Touchings (p < .01). The results are discussed in terms of differential perceptual-motor and motor growth and the need to structure educational experience that will contribute to this growth.     

Home language as a predictor of first-grade achievement for Anglo- and Mexican-American children

The utility of kindergarten screening measures in predicting first grade achievement was examined for 246 children classified as Anglo-American-English as home language (AA-E), Mexican-American-English as home language (MA-E), and Mexican-American-Spanish as home language (MA-S). All children were administered the Boehm Test of Basic Concepts, Draw-A-Design and Draw-A-Child subtests of the McCarthy Scales of Children's Abilities, and a Criterion Referenced Test at the beginning of kindergarten and at the end of kindergarten. The SRA Achievement Series was then administered during first grade. Stepwise multiple regression analyses were conducted for each group of children employing each set of kindergarten measures as predictors. All resulting equations were significant (p < .001) and revealed differential predictive power of the kindergarten measures as a function of ethnicity and home language, content of the criterion measures, and time of assessment. The Criterion Referenced Test was found to be a significant predictor of first-grade reading scores and the Draw-A-Design subtest emerged as a significant predictor of first-grade math achievement for the MA-S children, whereas the Boehm consistently emerged as a significant predictor and accounted for substantially more variance in first-grade reading and math scores for the AA-E and MA-E children. For all three groups, beginning kindergarten measures accounted for more variance in first-grade achievement than end of kindergarten measures. The importance of utilizing language measures, as well as predictive validity techniques, was discussed in relation to future cross-cultural research.     

A comparative analysis of the Bender-Gestalt and beery/buktenica tests of visual-motor integration as a function of grade level for regular education students

One hundred twenty-five randomly selected regular education students in grades kindergarten through three were administered the Bender-Gestalt and Beery/Buktenica tests of visual-motor integration. Significant differences between the mean Bender and Beery age equivalent scores at each grade level were found. Correlation coefficients ranged from.21 at the kindergarten level to.71 for the total group and were significant at the first and second grade, as well as for the total group. Implications for their utilization in assessing fine motor readiness development, particularly as they apply to the identification of learning disabilities, are discussed.     

The visual Aural digit span test and Bender gestalt test as predictors of wide range achievement test-revised scores

Visual Aural Digit Span Test (VADS) scores and Bender Gestalt Test (BG) scores as predictors of Wide Range Achievement Test-Revised (WRAT-R) scores were examined in this study. The sample consisted of 115 children referred for low academic achievement. They were divided into three age groups: (Low) 6–0 to 7–11; (Middle) 8–0 to 9–11; and (High) 10–0 to 11–11. The scores on the 11 VADS measures and BG errors were used to predict the WRAT-R achievement. The VADS Test scores were found to predict Reading and Arithmetic in the Low Group. The BG Test did not correlate with achievement in the Low Group. In the Middle Group, the VADS Test correlated with Reading and Spelling, but not with Arithmetic. The BG correlated with all three achievement measures. In the High Group, neither the VADS Test nor BG correlated with any of the achievement measures. The results suggest that the BG and VADS Test can be used as an effective screening device for young children with potential learning problems.     

Phonemic and graphemic consistency: Effects on decoding for German and American children

Speed, accuracy, and types of errors in decoding lists of words and pseudo words and performance in two phonemic awareness tasks were assessed for German and American children in the first and second grades. German children were significantly better than American children only in pseudo word decoding measures across grades. Between group analyses showed that American children committed more vowel and word substitution errors in both decoding accuracy tasks than German children. Word substitution errors were more likely in word decoding than in pseudo word decoding for children in both languages. Within group analyses indicate that variance in decoding errors and speed accounted for by word substitution versus nonword and vowel versus consonant errors differed dependent on grade and whether real or pseudo words were read. Results suggest successful reading in English depends upon more complex grapheme to phoneme correspondence rules than does reading in German.     

Dynamic visual perception and reading development in Chinese school children

The development of reading skills may depend to a certain extent on the development of basic visual perception. The magnocellular theory of developmental dyslexia assumes that deficits in the magnocellular pathway, indicated by less sensitivity in perceiving dynamic sensory stimuli, are responsible for a proportion of reading difficulties experienced by dyslexics. Using a task that measures coherent motion detection threshold, this study examined the relationship between dynamic visual perception and reading development in Chinese children. Experiment 1 compared the performance of 27 dyslexics and their age- and IQ-matched controls in the coherent motion detection task and in a static pattern perception task. Results showed that only in the former task did the dyslexics have a significantly higher threshold than the controls, suggesting that Chinese dyslexics, like some of their Western counterparts, may have deficits in magnocellular pathway. Experiment 2 examined whether dynamic visual processing affects specific cognitive processes in reading. One hundred fifth-grade children were tested on visual perception and reading-related tasks. Regression analyses found that the motion detection threshold accounted for 11% and 12%, respectively, variance in the speed of orthographic similarity judgment and in the accuracy of picture naming after IQ and vocabulary size were controlled. The static pattern detection threshold could not account for any variance. It is concluded that reading development in Chinese depends to a certain extent on the development of dynamic visual perception and its underlying neural pathway and that the impact of visual development can be specifically related to orthographic processing in reading Chinese.     

Locus and nature of perceptual phonological deficit in Spanish children with reading disabilities

The aims of this study were (a) to determine whether Spanish children with reading disabilities (RD) show a speech perception deficit and (b) to explore the locus and nature of this perceptive deficit. A group of 29 children with RD, 41 chronological age-matched controls, and 27 reading ability-matched younger controls were tested on tasks of speech perception. The effect of linguistic unit (word vs. syllable) and type of phonetic contrast (voicing, place and manner of articulation) were analyzed in terms of the number of errors and the response time. The results revealed a speech perception deficit in Spanish children with RD that was independent of the type of phonetic contrast and of linguistic unit.     

Children's Attitudes and Behavioural Intentions Towards Peers with Disabilities

This study used the theory of reasoned action to investigate determinants of primary school children's attitudes and behavioural intentions towards peers with physical disabilities. The influence of children's own attitudes toward working with peers with physical disabilities in regular classes and subjective norms provided by their teachers, principals, and parents were used to predict behavioural intentions to befriend and interact with classmates with physical disabilities. The participants were 143 fourth and fifth grade primary school students, their mothers, teachers, and school principals. The students completed an attitude questionnaire and a behavioural intention scale. Their parents, teachers, and principals completed a similar disability attitude questionnaire. The results supported the predictions made by the theory of reasoned action. Children's own attitudes towards the inclusion of peers with disabilities was the strongest predictor of behavioural intentions to interact with a classmate with a physical disability. The attitudes of teachers, principals, and parents were also significant predictors of intentions. However, only the attitudes of parents and school principals accounted for any more variance than children's attitudes alone. The implications of these findings are discussed in terms of developing whole class interventions to promote the social integration of children with physical disabilities.     

The criterion-related validity of psychoeducational tests for actual reading ability of learning disabled students

Although norm-referenced educational tests are used widely to identify children with learning disabilities, there have been few studies examining how performance on these tests relates to actual classroom functioning. This study examines the criterion-related validity of a battery of six educational diagnostic and achievement tests for actual reading level of a group of 155 learning disabled students enrolled in grades 4 to 7 and a subgroup of 46 learning disabled students enrolled in grades 5 and 6. Stepwise multiple regression analysis revealed that six subtests from the battery accounted for over 70% of the variance in reading for the larger group. When type of reading curriculum used was controlled, five subtests accounted for over 76% of the criterion. The theoretical and applied implications of these results for diagnostic assessment are discussed.     

Classroom behaviors associated with difficulties in visual-motor perception

The relationship between visual-motor perception as measured by Koppitz errors on the Bender and classroom behavior as indicated by teacher ratings on the Devereux was investigated for a sample comprised of 76 first-grade children from a suburban school. Most of these children came from upper middle class homes and were within the bright normal range of intelligence. Analysis of the regression of Koppitz errors on Devereux ratings indicated that three types of classroom behavior tend to be associated with poor visual-motor perception: (a) children with problems in this area seem to encounter difficulty understanding what is going on around them in the classroom; (b) these children appear to rush through their work without much concern for quality, and (c) they do not seem to show overt disrespect or resistance toward their teacher, school, or school work.     

Social inference skills in learning disabled and nondisabled children

The study examined the performance of 30 learning disabled and 30 nondisabled children in grades 1 through 7 on the Test of Social Inference (TSI). Results indicated that disabled students obtained lower TSI total scores that did nondisabled students: they also performed relatively lower on TSI items requiring more verbal expression. While no difference was found between the groups on the Motor-Free Visual Perception Test (MVPT), the relationship between MVPT and TSI scores was shown to be significant within the disabled group only. Furthermore, this group made more perceptual-type errors on the TSI. Findings are discussed in relation to previous research suggesting a link between visual perception and/or language fluency and social inference skills among learning disabled children.     

Comprehension of humor in children with nonverbal learning disabilities,reading disabilities,and without learning disabilities

The normal development of humor in children has been well documented with a predictable course that is tied to social, cognitive, and linguistic development in children. This study explored humor comprehension in children with nonverbal learning disabilities (NVLD). Children with NVLD were compared with children with reading disabilities and a comparison group of children with no learning disabilities to assess their comprehension of humor. The humor test was composed of a joke and cartoon section. No group differences in humor comprehension were found when the NVLD group was defined as having visual–spatial and visual reasoning deficits. However, when the NVLD group was divided into children with and without social perceptual difficulties as defined by a direct measure of social comprehension, significant group differences were found in the levels of humor comprehension. These results support the association of humor comprehension with social perception and lend tentative support to the hypothesis that children with NVLD may not be a homogenous group. Future study directions include further exploration into the nature of the association between humor comprehension and social perception as well as closer examination of the heterogeneity of NVLD.     

The digit naming speed test: Its power and incremental validity in identifying children with specific reading disabilities

This paper presents two studies, both of which address the question of whether a test that measures the automaticity with which digits can be named could be useful as part of a diagnostic battery to assess reading disabilities. In the first study, the Digit Naming Speed Test significantly differentiated elementary-school boys who were disabled readers from age-matched boys reading at appropriate grade levels, correctly classifying 83.3% of the children. In the second study, the Digit Naming Speed Test accounted for a significant portion of the word recognition variance of nondisabled readers over and above that portion accounted for by general intelligence as measured by the WISC-R. Taken together, these studies indicate that the Digit Naming Speed Test has the potential to contribute significantly to the diagnostic process.     

Long-term predictors of narrative skill in children with early bilateral cochlear implants

Narratives require the integration of many different linguistic skills and can be used as an ecologically valid measure of child language development. This study investigated the narrative skills of 18 six- to seven-year-old prelingually deaf children who received simultaneous bilateral cochlear implants (CI) between 5 and 18 months of age. No significant differences were found on any of the narrative measures between this group and a matched group of normal-hearing children. Measures taken of the children at 3, 6, 9, 12, 24, 36 and 48 months post-implantation, and measures from their parents were examined as possible predictors of narrative skills 72 months post-implantation. Child auditory skills, expressive language and receptive language were significant predictors of later narrative skills. A greater use of auditory-verbal language relative to visually supported language by parents and educators was associated with increased language complexity in child narratives. These results strongly suggest that early bilateral CI is associated with improved language outcomes for children with severe congenital hearing loss.     

Bender‐Gestalt II differential item functioning across Caucasian and African American examinees

Performance on figure copying tasks is empirically linked to the school readiness, learning, cognition, and neuropsychological functioning. These nonverbal tasks are frequently used to evaluate children from diverse backgrounds to minimize bias due to factors such as language, ethnicity, culture, or socioeconomic status on test performance. The current study examined the possible Differential Item Functioning across African American and Caucasian groups, ages 4 to 7 years, in Bender Motor Gestalt Test, Second Edition (BG‐II) visual‐motor scores. Results indicated that in general the BG‐II can be considered invariant across these ethnic groups in this age range.     

A comparison of the Visual Aural Digit Span and the Bender Gestalt as discriminators of low achievement in the primary grades

The Visual Aural Digit Span (VADS) and the Bender Visual Motor Gestalt Test (Bender) were studied with regard to their ability to discriminate low from average achievers in reading and arithmetic skills, as identified by the Iowa Test of Basic Skills. A sample of 78 normal children aged 6 through 9 were administered a battery of tests, including the verbal section of the WISC-R. Analysis of covariance with IQ controlled showed that the Bender and the VADS were able to discriminate between achievement groups for vocabulary and math concepts. The Bender discriminated between math problem-solving groups, but neither test could discriminate between reading comprehension groups. Age was a significant variable for the Bender and all VADS subtests except Aural-Written. Correlational analysis indicated that although the VADS was related to Verbal IQ, it is related only minimally to the Bender when age is controlled.     

Rapid naming speed and Chinese character recognition

We examined the relationship between rapid naming speed (RAN) and Chinese character recognition accuracy and fluency. Sixty-three grade 2 and 54 grade 4 Taiwanese children were administered four RAN tasks (colors, digits, Zhu-Yin-Fu-Hao, characters), and two character recognition tasks. RAN tasks accounted for more reading variance in grade 4 than in grade 2, and graphological RAN tasks accounted for more reading variance than RAN Colors. After controlling for age, nonverbal intelligence, phonological sensitivity, short-term memory, and orthographic processing, RAN tasks were significant predictors of character recognition fluency in grade 2, and of both accuracy and fluency in grade 4.     

The influence of phonological mechanisms in written spelling of profoundly deaf children

In the present study, the effect of phonological and working memory mechanisms involved in spelling Italian single words was explored in two groups of children matched for grade level: a group of normally hearing children and a group of pre-verbally deaf children, with severe-to-profound hearing loss. Three-syllable and four-syllable familiar words were presented to the two groups for spelling to dictation. Three conditions were used: simple spelling, concurrent articulation, and foot tapping. Verbal digit span was also assessed. Overall, the performance of deaf children tended to be lower compared to hearing children, but not significantly so. Concurrent articulation produced more errors than tapping in both groups. Regression analyses showed that the main predictor in all three tasks was school level, however the proportion of variance explained by this factor was much greater in the dual tasks, in particular in concurrent articulation. Qualitative analyses of errors showed a worse performance of deaf children, with a greater proportion of mixed errors compared to hearing children. They also showed a greater proportion of phonologically plausible errors compared to hearing children, presumably due to their deprived auditory representation, and/or to phonological representations that rely to a large extent on lip reading and kinesthetic and visual perception of articulatory gestures.