Before revision: This Wikipedia page Validity (avoidance of observational error, the overarching concern) · Accuracy · Precision ISO 5725 Accuracy · Trueness (avoidance of systematic error; previously, avoidance of bias) · Precision (avoidance of random error) Statistics Accuracy · Bias · Variability Psychometrics Measurement URL · Validity (avoidance of constant error) · Reliability (avoidance of variable error).
After revision: This Wikipedia page Validity (avoidance of observational error, the overarching concern) · Accuracy · Precision ISO 5725 Accuracy · Trueness (avoidance of systematic error; previously, avoidance of bias) · Precision (avoidance of random error) Statistics Accuracy · Bias · Variability Psychometrics Measurement properties · Validity (avoidance of constant error) · Reliability (avoidance of variable error).