Research Article
Psychometric Evaluation of the Persian Version of Barkley Adult Attention Deficit/Hyperactivity Disorder Screening Tool among the Elderly
Table 2
Situation of the internal consistency and test-retest reliability for each domain.
| | Domain | Number of questions | Cronbach’s alpha | Mean of interitem correlation | Internal consistency reliability | ICC (95% confidence interval) | Test-retest reliability |
| | ADHD Inattention | 9 | 0.81 | 0.35 | Suitable | 0.62 (0.37–0.77) | Medium | | ADHD Hyperactivity | 5 | 0.66 | 0.38 | Medium | 0.51 (0.19–0.71) | Medium | | ADHD Impulsivity | 4 | 0.56 | 0.27 | Medium | 0.82 (0.70–89) | Suitable | | Sluggish Cognitive Tempo | 9 | 0.82 | 0.35 | Suitable | 0.73 (0.55–0.84) | Suitable |
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Note. Total Cronbach’s alpha and total Intraclass correlation were 0.89 and 0.69, respectively/Intraclass correlation.
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