Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Reliability refers to the consistency or stability of scores obtained from an intelligence test over time and across different situations. A reliable test consistently yields similar results when administered multiple times.
Related terms
Test-Retest Reliability: Test-retest reliability assesses whether an intelligence test produces consistent results when individuals take it at two different points in time.
Split-half Reliability: Split-half reliability checks if there is internal consistency within an intelligence test by comparing one half of the items with another half.
Inter-rater Reliability: Inter-rater reliability examines whether multiple raters scoring the same intelligence tests achieve similar results, ensuring objectivity and consistency.