Bone Lead Levels and Language Processing Performance

The relation between bone lead absorption and language processing abilities in 156 randomly selected 11- to 14-year-old boys who were asymptomatic for lead toxicity is examined. Tibial lead concentrations were measured by X-ray fluorescence spectroscopy. The language processing outcome variables con...

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Bibliographic Details
Published in:Developmental neuropsychology 2000-01, Vol.18 (2), p.171-186
Main Authors: Campbell, Thomas F., Needleman, Herbert L., Riess, Julie A., Tobin, Michael J.
Format: Article
Language:English
Subjects:
Adolescent
Analysis of Variance
Biological and medical sciences
Chemical and industrial products toxicology. Toxic occupational diseases
Child
Child clinical studies
Humans
Intelligence
Language and communication disorders
Language Tests
Lead - analysis
Lead Poisoning, Nervous System, Childhood - epidemiology
Lead Poisoning, Nervous System, Childhood - metabolism
Lead Poisoning, Nervous System, Childhood - psychology
Male
Medical sciences
Metals and various inorganic compounds
Neuropsychological Tests
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Sampling Studies
Spectrometry, X-Ray Emission - methods
Tibia - metabolism
Toxicology
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Summary:The relation between bone lead absorption and language processing abilities in 156 randomly selected 11- to 14-year-old boys who were asymptomatic for lead toxicity is examined. Tibial lead concentrations were measured by X-ray fluorescence spectroscopy. The language processing outcome variables consisted of the least and most difficult subtests from the Nonword Repetition Task, Competing Language Processing Task, and the Revised Token Test. Participants were classified by quartiles according to bone lead concentrations, and analysis of variance and analysis of covariance measured the impact on language processing scores. Results showed that children in the highest bone lead quartile displayed decreased language processing performance on the most difficult language processing tasks but not on the easier tasks.
ISSN:8756-5641
1532-6942
DOI:10.1207/S15326942DN1802_2