Table 17.14 Disability Rating Scale Evaluation Summary

 

Reliability		Validity		Responsiveness
Rigor	Results	Rigor	Results	Rigor	Results	Floor/ceiling
+	+++(TR) +++(IO) ++(IC)	+++	+++	++	+ (p-values only)	+ (ceiling)

NOTE: +++=Excellent; ++=Adequate; +=Poor; N/A=insufficient information; TR=Test re-test; IC= Internal Consistency; IO=Interobserver; Varied (re. floor/ceiling effects; mixed results).