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Table 2 Mean scores and group comparison on five cognitive variables

From: Verbal learning impairment in adolescents with methamphetamine use disorder: a cross-sectional study

 

MA

(n = 18)

noMA

(n = 18)

noSUD

(n = 18)

Group differences

    

Test statistic (df)

p-value

Effect size

Trial 1

6.1 (2.5)

6.8 (2.0)

7.7 (2.1)

H [2] = 2.7

.259

ηp2 = .014

Trial 5

10.8 (2.8)

12.5 (2.2)

13.6 (1.6)

H [2] = 11.7

.003**

ηp2 = .190++

Cued recall

12.0 (3.3)

12.6 (2.9)

13.5 (1.5)

H [2] = 0.9

.623

ηp2 = .022

Go/noGo

468.1 (65.6)

452.4 (56.2)

451.8 (60.2)

H [2] = 3.3

.188

ηp2 = .025

Alertness

273.0 (50.7)

249.3 (34.8)

256.5 (21.1)

H [2] = 1.4

.493

ηp2 = .011

  1. Notes: ** p < 0.01; ++ large effect as indicated by ηp2 > 0.13 [25]. Trial 1, number of words recalled on trial 1 of the VLMT; trial 5, number of words recalled on trial 5 of the VLMT; cued recall, number of words of the VLMT correctly recognized after a delay, corrected for recognition mistakes; go/noGo, inverse efficiency score of the “go/noGo” subtest of the TAP; alertness, mean reaction time of the “alertness” subtest of the TAP in milliseconds; VLMT, Verbal Learning Memory Test; TAP, Test of Attentional Performance
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BMC Psychiatry

ISSN: 1471-244X

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