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. Author manuscript; available in PMC: 2014 May 1.
Published in final edited form as: J Cogn Neurosci. 2013 Oct 21;26(2):10.1162/jocn_a_00501. doi: 10.1162/jocn_a_00501

Table 3. Basic target discrimination across WM loads by genotype groups.

Target discrimination quantified as a d′ measure of correct target hits versus non-target false alarms (see Methods). Values are reported as mean ± standard error. Other conventions as for Tables 1 and 2. Significant main effect of WM load: F(2,178)=22.58, p<0.001; no significant main or interacting effects of COMT or DARPP-32 genotype on basic target detection (max F=1.69, min p=0.19).

COMT
Val/Val
D-32 C
(n = 15)		 COMT
Val/Met
D-32 C
(n = 20)		 COMT
Met/Met
D-32 C
(n = 9)		 COMT
Val/Val
D-32 T/T
(n=14)		 COMT
Val/Met
D-32T/T
(n=23)		 COMT
Met/Met
D-32 T/T
(n =16)
d'
0-back 3.87 ± 0.11 3.76 ± 0.09 3.47 ± 0.14 3.93 ± 0.11 3.70 ± 0.09 3.86 ± 0.10
2-back 2.76 ± 0.21 2.85 ± 0.17 2.03 ± 0.25 2.58 ± 0.20 2.70 ± 0.16 2.50 ± 0.19
3-back 1.86 ± 0.15 1.95 ± 0.12 1.70 ± 0.18 2.09 ± 0.15 1.70 ± 0.12 1.85 ± 0.14