The DSM-5, which stands for the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, establishes criteria for diagnosing intellectual disability. This manual is widely used by clinicians and researchers to diagnose and classify mental health disorders.
For intellectual disability, the DSM-5 outlines specific criteria that must be met, highlighting the importance of comprehensive assessment, rather than solely relying on IQ scores.
Here are the essential diagnostic criteria:
- Deficits in intellectual functions: Evidence of limitations in intellectual functions such as reasoning, problem-solving, planning, abstract thinking, and learning. This is typically determined through clinical assessment and standardized testing.
- Deficits in adaptive functioning: These must result in failure to meet developmental and socio-cultural standards. This impacts the individual’s ability to perform daily tasks in one or more aspects of daily life, such as communication and personal independence.
- Onset during the developmental period: The intellectual and adaptive deficits must originate during childhood or adolescence to distinguish them from other conditions that may arise in adulthood.