A rehabilitation study evaluates mobility outcomes in 47 elderly patients (mean age 72) using a 0–20 mobility scale. At baseline, 60% of highly functional participants score 20 despite varying functional abilities on direct observation. Post-intervention, the scale remains unchanged at 20 in these patients, while physical therapists document measurable gait speed improvements (0.3 m/s increase) and reduced fall risk. The scale fails to capture these objective gains. Which psychometric property best explains this limitation?
- A)Ceiling effectGABARITO
- B)Verification bias
- C)Floor effect
- D)Allocation concealment
- E)Confounding
Explicação
A ceiling effect occurs when an instrument cannot detect improvement because many participants already score near the maximum possible value. Once patients cluster at the top of the scale, additional gains are not captured. This reduces the instrument's respon... Ver explicação completa e trilha adaptativa →