Skip to main content

Table 3 Estimates from models of the predictors of log-RT for the dual by bright condition

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

Parameter

Empty model

Full model

Non-significant interaction removed

Covariates removed

Mean

SE

Mean

SE

Mean

SE

Mean

SE

Fixed effects

 Intercept

466.98**

1.58

273.63**

17.67

269.35**

14.91

433.08**

13.48

 Level 1 (trial-specific)

  Trial

  

−0.04

0.11

−0.01

0.05

−0.04

0.05

  Side

  

−1.98**

1.59

−1.99**

1.60

  

 Level 2 (individual)

  Age

  

0.95**

0.19

0.95**

0.19

  

  Asian

  

15.14**

4.90

15.16**

4.90

11.99**

2.22

  Black

  

22.05**

9.68

22.08**

9.69

24.30**

4.49

  Hispanic

  

4.94*

5.37

4.94

5.37

9.94**

2.39

  White

  

0a

0a

0a

0a

0a

0a

  Error rate

  

−299.52**

155.79

−299.90**

155.87

  

  Sleepiness (centered)

  

0.29

0.50

0.29

0.50

  

  Std. Dev. of Log RT

  

1124.44**

1548.55

1123.96**

170.42

  

  APOE (0 risk)

  

5.63

12.82

7.18**

6.42

10.95

5.94

   (1 risk)

  

8.05*

8.11

9.85**

4.21

5.57

3.76

   (2 risk)

  

0a

0a

0a

0a

0a

0a

  COMT (0 risk)

  

−11.05**

10.99

−3.16

5.67

−13.25*

5.06

   (1 risk)

  

4.12

8.08

8.78**

4.23

1.51

3.70

   (2 risk)

  

0a

0a

0a

0a

0a

0a

  DAT1 (0 risk)

  

30.71**

17.51

22.85**

8.95

17.87*

8.04

   (1 risk)

  

3.00

6.94

−1.62

3.53

4.57

3.20

   (2 risk)

  

0a

0a

0a

0a

0a

0a

  DBH (0 risk)

  

3.06

9.78

3.20

5.05

4.72

4.51

   (1 risk)

  

−7.27*

7.80

−5.83**

3.98

−4.17

3.59

   (2 risk)

  

0a

0a

0a

0a

0a

0a

  DRD4 (0 risk)

  

11.49**

9.26

10.91**

8.95

11.34**

4.29

   (1 risk)

  

14.03**

8.03

13.43**

7.77

15.94**

3.72

   (2 risk)

  

0a

0a

0a

0a

0a

0a

  APOE (0 risk)*Trial

  

NS

NS

  

NS

NS

  COMT (0 risk)*Trial

  

NS

NS

  

NS

NS

  DAT1 (0 risk)*Trial

  

NS

NS

  

NS

NS

  DBH (0 risk)*Trial

  

NS

NS

  

NS

NS

  DRD4 (0 risk)*Trial

  

−0.09*

0.08

−0.08*

0.08

−0.09*

0.04

   (1 risk)

  

−0.04

0.07

−0.03

0.07

−0.04

0.03

   (2 risk)

  

0a

0a

0a

0a

0a

0a

Covariance parameters

 Repeated measures

  

5519.27**

0.16

5525.59**

0.16

6344.33**

0.18

 Number of parameters

2

31

23

26

 Schwarz’s Bayesian criterion (BIC)

−6453.45

−5096.70

−5223.97

−4837.26

  1. Significant values for ethnicities indicate that the ethnic group is different from Caucasians on RT values. Other significant values indicate that the estimate is different from zero. We report in the “Results” section tests of fixed effects for gene by trial interactions to determine if slopes differ by genotype
  2. Note that this table shows model parameter estimates when analyzing log transformed RTs. The values have been retransformed. However, to get a rough idea of slope differences by genotype group, please see Table 12 for raw RTs (ms)
  3. NS the slopes were not significantly different from zero and so the row has been collapsed
  4. * Significant at p < 0.05
  5. ** Significant at p < 0.01
  6. aThis parameter has been set to zero