Jansen has developed a scale to assess childhood anxiety.Critics of the scale say that some items on the scale measure depression, not anxiety.Jansen could do a study establishing the reliability of the scale to address these critics.

Question

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Internal consistency would be the best choice because it assesses how consistently the items on the scale measure the same construct (anxiety). By analyzing how closely related the items are to each other, Jansen can determine if certain items are tapping into a different construct (such as depression) and remove them from the scale to improve its validity. Test-retest would assess the stability of the scale over time, whereas interrater reliability would not be relevant for a self-report scale like this. Construct validity would be important for establishing that the scale is actually measuring anxiety, but it does not address the specific concern that some items may measure depression instead.

Jansen Has Developed a Scale to Assess Childhood Anxiety