Psy341 - lecture 5 (february 8, 2016): intellectual disability. Early 1800s: understood that those with intellectual disability were not a homogeneous group and had daily living handicaps. Definition: intellectual disability (id) is characterized by significant limitations both in intellectual functioning and in adaptive behaviours as expressed in conceptual, social, and practical adaptive skills. Professional nomenclature has been associated with stigmatization. Goddard"s 1910 classification scheme: moron (mild range); imbecile (moderate-severe range); idiot (profound range) Aaidd changed its name in 2007 from american association. Change in terminology adopted into u. s. federal law in 2010: in dsm-v on mental retardation. Intellectual functioning: assessed by standardized intelligence test such as the. Flynn effect: observes that iq scores increase over time. Could be the influence of better schooling, medical advances, familiarity. Re-norming of iq tests effects diagnostic cut-off scores. Iq tests entwined with social and political issues since introduction in us. Sued to screen immigrants from southern europe.