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Table 4 Two-way repeated measures analyses of variance to examine Quotient® attention variables for medication condition

From: Differentiating ADHD from oral language difficulties in children: role of movements and effects of stimulant medication

 

Off medication (n = 16)

On medication (n =16)

    
 

M (SD)

M (SD)

    
 

T1

T2

T1

T2

Statistic

Value

p

η 2

Accuracy

81.14 (13.81)

85.91 (12.09)

86.44 (12.40)

89.83 (6.30)

Group

F(1,15)

8.14

.01*

.35

Omission errors

14.19 (14.49)

11.11 (15.11)

4.08 (5.88)

3.89 (5.37)

Group

F(1,15)

9.90

.01*

.40

Commission errors

23.56 (16.27)

16.96 (13.33)

23.14 (19.74)

16.46 (8.94)

Group

F(1,15)

.06

.81

 

Variability

217.44 (81.27)

198.00 (88.15)

153.63 (76.77)

122.75 (55.26)

Group

F(1,15)

33.62

.00*

.69

Latency

598.37 (105.77)

584.63 (89.17)

545.44 (81.50)

495.37 (80.31)

Group

F(1,15)

28.03

.00*

.65

COV

35.50 (11.42)

32.25 (10.06)

27.13 (10.91)

23.69 (7.49)

Group

F(1,15)

32.28

.00*

.68

  1. *Significant p-value alpha level of .01. η2 effect sizes of .01, 06, and .14 represent small, medium, and large effects sizes respectively.
  2. Accuracy: Percentage of correct responses to both target and non-target.
  3. Omission Errors: Percentage of missed targets.
  4. Commission Errors: Percentage of incorrect responses to non-target.
  5. Latency: Mean time, in milliseconds, to respond to target.
  6. Variability: Standard deviation of response time to target.
  7. Coefficient of Variance (COV): A more stringent measure of response consistency: (100 x variability)/latency.
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BMC Psychiatry

ISSN: 1471-244X

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