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. Author manuscript; available in PMC: 2006 Jan 25.
Published in final edited form as: Psychol Sci. 2005 Mar;16(3):200–207. doi: 10.1111/j.0956-7976.2005.00804.x

TABLE 1.

Mean of Median Reaction Times (in Milliseconds) on the Visuospatial Attention Task for the Three CHRNA4 Genotypes

Genotype
Cue validity TT TC CC
500-ms SOA
Valid 592.3 (15.1) 596.4 (25.4) 608.9 (22.8)
Neutral 597.5 (14.4) 634.3 (29.0) 633.1 (23.9)
Invalid 625.3 (15.4) 648.0 (32.6) 647.4 (25.7)
2,000-ms SOA
Valid 610.5 (16.4) 611.7 (25.9) 618.6 (20.8)
Neutral 610.2 (16.0) 632.7 (26.3) 652.2 (22.5)
Invalid 657.3 (18.6) 659.2 (30.7) 654.7 (23.4)

Note. The three genotypes TT, TC, and CC correspond to increasing gene dose (0, 1, and 2, respectively) of the C allele of the CHRNA4 gene. Standard errors are in parentheses. SOA = stimulus-onset asynchrony.