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Journal of Learning Disabilities
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Hair Mineral Content as a Predictor of Learning Disabilities

Mike Marlowe, PhD

Mike Marlow is an associate professor of special education at the University of Wyoming. He received his PhD in special education from the University of Florida. He is an advisor to the President's Committee on Mental Retardation regarding toxic metal exposure and related mental retardation. Address: Dr. Mike Marlow, Area of Special Education, Box 3374, University of Wyoming, Laramie, Wyoming, 82071.

Ace Cossairt, PhD

Ace Cossairt is an associate professor of special education at the University of Wyoming. He received his PhD in psychology from the University of Kansas.

Ken Welch, PhD

Ken Welch is principal of Big Horn Elementary School, Sheridan, Wyoming. He received his PhD in Curriculum and Instruction from the University of Wyoming.

John Errera, BLD, MT

John Errera is director-president of Doctor's Data of West Chicago, Illinois. He received his medical technology degree from Case Western Reserve.

Recent research has discovered childhood learning disabilities are related to the presence in the body of above--normal levels of certain mineral elements, especially lead. This study investigated the relationships between hair mineral elements and childhood learning disabilities and determined which minerals, if any, separated a group of learning disabled children with a normal control group. The learning disabled group had significantly raised hair--lead concentrations. There were also differences in the mean levels of ten other minerals. Discriminant function analysis revealed by using lead, calcium, silicon, aluminum, vanadium, mercury, and zinc, subjects could be correctly classified as normal controls or learning disabled with 91.7% and 76.1% accuracy, respectively. It is concluded continuing research is needed to study the relationships between hair mineral element patterns and childhood learning disabilities.

Journal of Learning Disabilities, Vol. 17, No. 7, 418-421 (1984)
DOI: 10.1177/002221948401700707
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Home page
 Journal of Special EducationHome page
M. Marlowe
Metal Pollutant Exposure and Behavior Disorders: Implications for School Practices
Journal of Special Education, July 1, 1986; 20(2): 251 - 264.
[Abstract] [PDF]