BMC Neuroscience

Table 2 Correlations between the dependent variable, genetic markers, and covariates

From: Genetic contributions to attentional response time slopes across repeated trials

	1	2	3	4	5	6	7	8	9	10	11	12	13	14
1. Log RT		0.36**	−0.17	0.11	−0.05	0.01	−0.08	−0.20*	0.07	0.09	0.15	0.10	0.13	0.07
2. SD of Log RT			−0.02	0.18*	−0.01	0.05	−0.11	−0.23**	0.06	0.10	0.20*	0.07	−0.29**	0.38**
3. APOE				−0.10	−0.15	0.00	−0.09	0.00	−0.03	0.11	−0.03	0.04	−0.05	0.02
4. COMT					−0.08	−0.03	0.09	−0.25**	0.16	0.15	0.08	0.13	−0.06	0.14
5. DAT1						−0.06	−0.14	0.06	0.08	−0.24**	−0.02	0.19*	0.05	−0.03
6. DBH							−0.02	−0.19*	0.22**	−0.07	0.08	0.05	−0.19*	−0.03
7. DRD4								0.21*	−0.11	−0.07	−0.13	−0.02	0.13	−0.04
8. Caucasian									−0.63**	−0.32**	−0.53**	−0.02	0.29**	−0.08
9. Asian										−0.10	−0.17*	−0.06	−0.21*	0.02
10. Black											−0.08	0.01	−0.08	0.07
11. Hispanic												0.10	−0.12	0.05
12. Sleepiness													0.00	0.02
13. Age														−0.11
14. Error rate

Note that the highest correlation with log transformed RT is the standard deviation of log transformed RT. This is likely due to the mathematical relationship between SD of log RT and log RT
** Significant at p < 0.01
* Significant at p < 0.05

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