Mercury Poisoning
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Autism
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Some aspect of mental impairment in all symptomatic cases
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Some aspect of mental impairment in all cases
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Borderline intelligence on testing among previously normal individuals; mental retardation occurring in severe cases of pre-/postnatal exposure; some cases of MR reversible; primate studies indicate core intelligence spared with low exposures
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Borderline intelligence or mental retardation on standard tests among previously normally appearing infants; some cases of MR “reversible”; indications that normal IQ might be present in MR-labeled individuals
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Uneven performance on subtests of intelligence
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Uneven performance on subtests of intelligence
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Verbal IQ higher than performance IQ; compromised language/verbal expression and comprehension
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Verbal IQ higher than performance IQ; compromised language/verbal expression and comprehension
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Poor concentration, shortened attention span, general lack of attention; poor response inhibition
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Lack of concentration, short attention span, lack of attention, difficulty shifting attention
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Forgetfulness, loss of memory, particularly short term, verbal and auditory memory; mental confusion
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Poor short term/working memory; poor auditory and verbal memory; lower verbal encoding abilities
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Poor visual and perceptual motor skills, poor eye-hand coordination; impairment in simple reaction time
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Poor visual and perceptual motor skills, poor eye-hand coordination; lowered performance on timed tests
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Not reported as being tested
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Difficulty processing multiple stimuli
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Difficulty carrying out complex commands
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Difficulty carrying out multiple commands
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Alexia (inability to comprehend the meaning of written words)
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Hyperlexia (ability to decode words while lacking word comprehension)
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Deficits in constructional skills, conceptual abstraction, understanding abstract ideas and symbolism; degeneration of higher mental powers
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Deficits in abstract/conceptual thinking, symbolism, understanding other’s mental states; impairment in sequencing, planning, organizing
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Lack of understanding of object permanence (primates)
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Deficient understanding of object permanence (children)
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