The double-deficit model has been examined primarily in relation to reading. We investigated whether children classified according to the double-deficit model would exhibit differences in other neuropsychological domains. Children referred for learning problems (N = 188), ages 7 to 11, were classified by double-deficit subtype. Only three of the four groups predicted by the model could be identified. There were no group differences in IQ or attention problems. The three groups showed different neuropsychological profiles, involving functional domains other than reading and language. Differences also emerged in nonverbal low-level information processing. The double-deficit group was generally most severely affected. The double-deficit groupings identify children with different neuropsychological profiles and variation in the efficiency of basic online information processing, extending beyond the oral and written language domain.
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References
1.
Ackerman, P.T., Holloway, C.A., Youngdahl, P.L., & Dykman, R.A. (2001). The double-deficit theory of reading disability does not fit all. Learning Disabilities Research & Practice , 16, 152—160.
2.
Badian, N.A. (1997). Dyslexia and the double deficit hypothesis. Annals of Dyslexia, 47, 69—87.
3.
Beery, K.E. (1989). The developmental test of visual—motor integration (3rd rev.). Cleveland, OH: Modern Curriculum Press.
4.
Bernstein, J.H., & Waber, D.P. (1996). The developmental scoring system for the Rey-Osterrieth Complex Figure. Odessa, FL: Psychological Assessment Resources.
5.
Bowers, P.G., Sunseth, K., & Golden, J. (1999). The route between rapid naming and reading progress . Scientific Studies of Reading, 3, 31—53.
6.
Bowers, P.G., & Wolf, M. (1993). Theoretical links among naming speed, precise timing mechanisms and orthographic skill in dyslexia. Reading and Writing, 5, 69—85.
Denckla, M.B., & Rudel, R.G. (1976). Rapid “automatized” naming (RAN): Dyslexia differentiated from other learning disabilities. Neuropsychologia, 14, 471—479.
9.
Fletcher, J.M., Shaywitz, S., Shankweiler, D.P., Katz, L., Liberman, I.Y., Stuebing, K.K., et al. (1994). Cognitive profiles of reading disability. Comparison of discrepancy and low achievement definitions. Journal of Educational Psychology, 86, 6—23.
10.
Gaddes, W.H., & Crockett, D.J. (1975). Spreen-Benton aphasia tests: Normative data as a measure of normal language development. Brain andLanguage, 2, 257— 280.
11.
Hollingshead, A.B. (1975). Two-factor index of social position. Unpublished manuscript, Yale University, New Haven, CT.
12.
Joanisse, M.F., Manis, F.R., Keating, P., & Seidenberg, M.S. (2000). Language deficits in dyslexic children: Speech perception, phonology, and morphology. Journal of Experimental Child Psychology, 77, 30—60.
13.
Kaufman, A.S., & Kaufman, N. (1990). Kaufman brief intelligence test. Circle Pines, MN: American Guidance Service.
14.
Levy, B.A., Bourassa, D.C., & Horn, C. (1999). Fast and slow namers: Benefits of segmentation and whole word training. Journal of Experimental Child Psychology , 73, 115—138.
15.
Lovett, M.W., Steinbach, K.A., & Frijters, J.C. (2000). Remediating the core deficits of developmental reading disability: A double-deficit perspective. Journal of Learning Disabilities, 33, 334—358.
16.
MacMillan, D.L., Gresham, F.M., & Bocian, K.M. (1998). Discrepancy between definitions of learning disabilities and school practices: An empirical investigation. Journal of Learning Disabilities, 4, 314—326.
17.
MacMillan, D.L., & Speece, D.L. (1999). Utility of current diagnostic categories for research and practice. In R. Gallimore & L. P. Bernheimer (Eds.), Developmental perspectives on children with high-incidence disabilities (pp. 111—133). Mahwah, NJ: Erlbaum.
18.
Manis, F.R., Doi, L.M., & Bhadha, B. (2000). Naming speed, phonological awareness, and orthographic knowledge in second graders. Journal of Learning Disabilities , 33, 325—334.
19.
Markwardt, F.C. (1989). Peabody individual achievement test—Revised . Circle Pines, MN: American Guidance Service.
20.
McBride-Chang, C., & Manis, F.R. (1996). Structural invariance in the associations of naming speed, phonological awareness, and verbal reasoning in good and poor readers: A test of the double deficit hypothesis. Reading and Writing , 8, 323— 339.
21.
Morris, R.D., Stuebing, K.K., Fletcher, J.M., Shaywitz, S.E., Lyon, G.R., Shankweiler, D.P., et al. (1998). Subtypes of reading disability: Variability around a phonological core. Journal of Educational Psychology , 90, 347—373.
22.
Psychological Corp. (1992). Wechsler individual achievement test (1992). San Antonio, TX: Author.
23.
Rack, J.P., Snowling, M.J., & Olson, R.K. (1992). The nonword reading deficit in developmental dyslexia: A review. Reading Research Quarterly, 27, 28—53.
24.
Reynolds, C.R. (1985). Critical measurement issues in learning disabilities . The Journal of Special Education, 18, 451—476.
25.
Reynolds, C.R., & Kamphaus, R.W. (1992). Behavior assessment system for children. Circle Pines, MN: American Guidance Service.
26.
Semrud-Clikeman, M., Steingard, R.J., Filipek, P., Biederman, J., Bekken, K., & Renshaw, P.F. (2000). Using MRI to examine brain—behavior relationships in males with attention deficit disorder with hyperactivity. Journal of the American Academy of Child and Adolescent Psychiatry, 39, 477—484.
27.
Sheslow, D., & Adams, W. (1990). The wide range assessment of memory and learning . Wilmington, DE: Wide Range.
28.
Tallal, P. (1980). Auditory temporal perception, phonics, and reading disabilities in children. Brain andLanguage, 9, 182—198.
29.
Torgesen, J.K., Alexander, A.W., Wagner, R.K., Rashotte, C.A., Voeller, K.K.S., & Conway, T. (2001). Intensive remedial instruction for children with severe reading disabilities: Immediate and long-term outcomes from two instructional approaches. Journal of Learning Disabilities, 34, 33—58.
30.
Torgesen, J.K., Wagner, R.K., & Rashotte, C. (1999). Test of word reading efficiency. Austin, TX: PRO-ED.
31.
Waber, D.P., & Bernstein, J.H. (1994). Repetitive graphomotor output in learning-disabled and non-learning-disabled children: The Repeated Patterns Test. Developmental Neuropsychology, 10, 51—65.
32.
Waber, D.P., & Forbes, P.W. (2001). Pathways to fluency: Do higher-order linguistic processes mediate the contribution of low-level information processing to reading efficency? Unpublished manuscript.
33.
Waber, D.P., Marcus, D., Forbes, P., Bellinger, D., Weiler, M.D., & Curran, T.C. (2001). Implicit learning of motor sequences is impaired in children with reading disability. Unpublished manuscript, Children's Hospital, Boston.
34.
Waber, D.P., Weiler, M.D., Bellinger, D., Marcus, D.J., Forbes, P., Wypij, D., et al. (2000). Diminished motor timing control in children referred for diagnosis of learning problems. Developmental Neuropsychology, 17, 181—198.
35.
Waber, D.P., Wolff, P.H., Forbes, P.W., & Weiler, M.D. (2000). Rapid automatized naming in children referred for evaluation of heterogeneous learning problems: How specific are naming speed deficits to reading impairment?Child Neuropsychology , 6, 251—261.
36.
Waber, D.P., Wolff, P.H., Weiler, M.D., Bellinger, D., Marcus, D.H., Forbes, P., et al. (2001). Processing of rapid auditory stimuli in school-age children referred for evaluation of learning disorder. Child Development, 72, 37— 49.
37.
Wechsler, D. (1991). Wechsler intelligence scale for children (3rd ed.). San Antonio, TX: Psychological Corp.
38.
Weiler, M.D., Bellinger, D., Marmor, J., Wypij, D., Rancier, S., & Waber, D.P. (1999). Parent and teacher reports of ADHD symptoms: DSM-IV questionnaire data. Journal of the American Academy of Child and Adolescent Psychiatry, 38, 1139—1147.
39.
Weiler, M.D., Bellinger, D., Simmons, E., Rappaport, L., Urion, D.K., Mitchell, W., et al. (2000). Reliability and validity of a DSM-IV based ADHD screener. Child Neuropsychology, 6, 3—23.
40.
Weiler, M.D., Singer-Harris, N., Marcus, D.H., Bellinger, D., Kosslyn, S., & Waber, D.P. (2000). Speed of information processing in children referred for learning problems as measured by a visual filtering test. Journal of Learning Disabilities, 33, 538—550.
41.
Wolf, M. (1999). What time may tell: Towards a new conceptualization of developmental dyslexia. Annals of Dyslexia, 49, 3—28.
42.
Wolf, M., & Bowers, P.G. (1999). The double-deficit hypothesis for the developmental dyslexias. Journal of Educational Psychology, 91, 415—438.
43.
Wolf, M., Bowers, P.G., & Biddle, K. (2000). Naming-speed processes, timing, and reading: A conceptual review. Journal of Learning Disabilities, 33, 387—407.
44.
Wolf, M., Miller, L., & Donnelly, K. (2000). Retrieval, automaticity, vocabulary elaboration, orthography (RAVE-O): A comprehensive, fluency-based reading intervention program. Journal of Learning Disabilities, 33, 375—386.
45.
Wolff, P.H., Michel, G.F., Ovrut, M., & Drake, C. (1990). Rate and timing precision of motor coordination in developmental dyslexia. Developmental Psychology, 26, 349—359.
46.
Woodcock, R.W., & Johnson, M.B. (1990). The Woodcock-Johnson tests of achievement— Revised. Chicago: Riverside.
