Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
A measurement tool refers to any instrument or method used to assess or measure a particular variable or construct in research or psychological testing.
Validity refers to how accurately and appropriately a measurement tool measures what it is intended to measure.
Test-Retest Reliability: Test-retest reliability is the consistency of measurements obtained from the same test administered at different points in time.
Internal Consistency Reliability: Internal consistency reliability refers to the extent to which the items within a measurement tool consistently measure the same construct.