Developmental Onset
Definition
Evidence that relevant limitations originated during the developmental period under the named framework.
Related terms
- Adaptive Functioning
- Conceptual, social and practical functioning in relevant everyday contexts.
- Flynn Effect
- Population-level changes in measured cognitive performance across cohorts or periods; magnitude and direction vary.
- Intellectual Functioning
- Abilities such as reasoning, learning and problem-solving, evaluated with appropriate clinical and standardised methods.
- Measurement Uncertainty
- The range around a reported value within which the true quantity plausibly lies, derived from instrument precision, calibration standards, replicate variability, and...
- Performance Validity
- Whether observed performance supports its intended interpretation as evidence of ability.