Review
What is Intelligence? - Traits or State? - ANS ✔✔Change within people:
- IQ testing in infancy not related to later IQ (exception, severe delay).
- IQ becomes more stable through early childhood.
- Developmental Tasks.
- Environment (early stimulation) and testing situation.
Change over time:
- Flynn effect (quality of life, practice).
- Re-norming of tests.
ID Core Features - ANS ✔✔Deficits in "intellectual functions":
- DSM-5 does not specify a cutoff (IQ < 70 previously).
- Determined by standardized testing and clinical assessment.
Deficits in "adaptive functioning":
- failure to meet developmental and sociocultural standards for personal independence and
social responsibility (conceptual, social, practical).
- Onset during the "developmental period".
Examples of Adaptive Functioning - Conceptual Skills - ANS ✔✔Language, Symbolic reasoning
(money!), and Meta-cognition.
Examples of Adaptive Functioning - Social Skills - ANS ✔✔Gullibility, Responsibility/Rule-
Abiding, and Social Cues.
, Examples of Adaptive Functioning - Practical Skills - ANS ✔✔Self-care, Household tasks, and
Occupational skills.
Subtypes by Severity - Mild ID - Conceptual Domain - ANS ✔✔Learning difficulties emerging in
school-age; academic skills up to 6th grade level.
Subtypes by Severity - Mild ID - Social Domain - ANS ✔✔Immaturity/poor emotion regulation,
difficulty reading social cues, poor ability to communicate.
Subtypes by Severity - Mild ID - Practical Domain - ANS ✔✔May need some support with
complex tasks.
Subtypes by Severity - Mild ID** - ANS ✔✔Applies to about 85% of persons with ID.**
Overrepresentation of minority group/low SES members.
Prevalence (all subtypes) - ANS ✔✔Community prevalence approximately 1%.
Cultural and contextual differences,
- More prevalent in lower SES groups.
- More prevalent in minority groups.
- Difference only apparent for less severe ID.
Gender differences:
- Slightly more males than females (1.6:1 for mild).
- Especially for ID with "organic" causes.