Table 2 Psychometric properties of the DKAS-A compared to DKAS21-A.

From: Arabic translation and validation of the dementia knowledge assessment scale (DKAS-A) and public knowledge assessment in the United Arab Emirates

Test

Statistic

DKAS-A

DKAS21-A

Test-retest reliability

ICC (95% Cl)

0.670 (0.546–0.765)

0.654 (0.526–0.753)

Equivalent form’s reliability (English to Arabic)

Pearson’s correlation coefficient (p-value)

0.875 (p < 0.001)

0.870 (p < 0.001)

Equivalent form’s reliability (Arabic to English)

0.827 (p < 0.001)

0.787 (p < 0.001)

Internal consistency

Cronbach’s α

0.70

0.66

McDonald’s ω

0.77

0.77

Split-half reliability

Spearman–Brown coefficient

0.808

0.783

Guttman coefficient

0.807

0.783

Known-groups method (caregiver vs. non-caregiver)

t (p-value)

−2.978 (0.003)

−2.607 (0.009)

Known-groups method (caregiver vs. medicine)

−0.170 (0.865)

−0.220 (0.827)

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