Table 7.

Effect (beta) of 10-fold increase in the prenatal MeHg exposure on the change in scores of neuropsychological tests first applied at age 7 years and repeated at 14 years, after adjustment for covariates.

Test	Beta	P
NES2 Finger Tapping
preferred hand	0.342	0.66
non-preferred	−0.308	0.64
both hands	−2.35	0.16
NES2 Continuous Performance Test
average reaction timea	−17.1	0.093
number of false negativesa	−1.55	0.11
Digit Span Forward	0.078	0.60
Boston Naming Test
number correct without cues	0.621	0.20
total correct with cues	0.352	0.46
California Verbal Learning Test
learning, total correct, 5 trials	0.144	0.88
short delay, free recall	0.652	0.046
long delay, free recall	0.444	0.19
long delay, recognition	0.247	0.30

^aAn increase in the test parameter denotes a deficit.