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Table 1 Performance and search characteristics of the ADHD and control groups.

From: More to ADHD than meets the eye: Observable abnormalities in search behaviour do not account for performance deficits on a discrimination task

  

Mean Performance & Search Style (standard deviation)

F Statistics

  

5-s

10-s

15-s

20-s

Group

Interval

GxI

correct responses

Control

4.15 (2.21)

6.10 (1.68)

6.30 (2.20)

5.94 (1.84)

13.71*

13.61** 10.25**

0.6

 

AD/HD

2.56 (1.13)

4.31 (1.80)

4.60 (2.26)

5.15 (2.36)

   

number boxes open

Control

1.54 (0.37)

3.31 (0.50)

4.55 (1.04)

4.22 (1.14)

7.09*

138.42** 36.82**

5.12**

 

AD/HD

1.30 (0.37)

2.51 (0.79)

3.42 (1.10)

4.14 (1.27)

   

look time per trial (s)

Control

3.03 (0.24)

6.58 (0.68)

10.10 (1.50)

14.38 (1.47)

6.10*

548.9** 0.71

1.54

 

AD/HD

2.67 (0.47)

5.91 (1.11)

9.96 (1.45)

12.99 (2.71)

   

search Initiation (s)

Control

1.49 (0.29)

1.58 (0.43)

1.61 (0.45)

1.65 (0.42)

4.85*

3.64* 1.77

1.07

 

AD/HD

1.59 (0.51)

2.02 (0.91)

1.99 (0.75)

2.00 (0.77)

   

systematic searches

Control

5.00 (2.61)

7.95 (1.43)

7.46 (1.23)

7.62 (1.72)

25.76**

39.25** 36.07**

1.89

 

AD/HD

2.35 (1.98)

5.20 (1.57)

6.15 (2.10)

5.52 (2.11)

   
  1. Note: AD/HD = Attention Deficit/Hyperactivity Disorder. Figures in parentheses are standard deviations. * p < 0.05; ** p < 0.01. Italicised figures in F column relate to quadratic contrasts.