Shizuka administered a self-developed depression scale twice on a group of patients at a hospital.At both times,she observed that different scores were yielded by the same set of patients.From this scenario,it can be concluded that Shizuka's scale lacks
A)convergence.
B)divergence.
C)reliability.
D)validity.

Question

Quizplus · Accepted Answer

Reliability refers to the consistency of a measure or scale. If a scale or measure is reliable, it should yield consistent scores over time and across different raters or assessors. In this scenario, Shizuka administered the scale twice but obtained different scores for the same set of patients, indicating a lack of consistency and hence a lack of reliability. Choice A, convergence, refers to the degree to which different measures of the same construct are related, and is not relevant in this scenario. Choice B, divergence, refers to the degree to which a measure is distinct from other measures of different constructs, and is also not relevant in this scenario. Choice D, validity, refers to the degree to which a measure assesses what it is intended to assess, and is not evident from the scenario provided.

Shizuka Administered a Self-Developed Depression Scale Twice on a Group