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Table 2 Internal consistency and convergent validity of the QCD

From: The reliability and validity of the Questionnaire - Children with Difficulties (QCD)

Subscore of QCD

Cronbach’s α

 
  

ODBI

ADHD-RS

   

Hyperactivity

Inattention

Total score

Early morning/before going to school

0.756

−0.419

−0.332

−0.448

−0.440

School

0.736

−0.241

−0.257

−0.355

−0.348

After school

0.680

−0.256

−0.279

−0.411

−0.398

Evening

0.775

−0.552

−0.429

−0.542

−0.547

Night

0.569

−0.262

−0.243

−0.279

−0.291

Overall behavior

0.728

−0.505

−0.400

−0.457

−0.474

Total

0.876

−0.514

−0.448

−0.575

−0.577

  1. All correlations were significant at p < 0.001.