Term originated from Latin "imbecillus" meaning weak or weak-minded. Refers to moderate to severe intellectual disability with IQ 25-50. Originally categorized people aged 3-7 with IQ 25-50. Later refined into mental and moral imbecility
Intellectual disability affects cognitive functioning and skills before age 22. Requires IQ below 70 and significant adaptive behavior limitations. Most common developmental disability globally
Story told through Charlie's personal diary about a man with low IQ. Charlie is a 30-something man determined to become smarter. Charlie's IQ is 68, but he's aware of his intellectual disability
American Psychiatric Association releases DSM-V, the fifth edition of the Diagnostic Manual of Mental Disorders. DSM is the generally accepted authority on mental health diagnoses
WAIS-IV measures intelligence in adults aged 16-90. Test evaluates cognitive abilities across four main domains. Used for diagnosing intellectual disabilities and learning disorders
Rosemary Kennedy was John F. Kennedy's eldest sister. She appeared healthy at birth but showed developmental delays. Possible causes include hypoxic-ischemic injury and congenital hyperbilirubinemia. Delivery position "Knee-Chest" may have caused complications