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Intellectual disability
significant limitations in cognitive ability, interfere with adaptive functioning (everyday activities: cook, manage bills), low IQ
Early onset
from birth, neurodevelopmental disorders (ex. autism, ADHD)
Eugenics
Francis Galton, strengthen human gene pool by discouraging people w/ disorders from reproducing, marrying, and forced sterilization
IQ
mental age/chronological age x 100
Modern intelligence tests are…
standardized (norms), reliable (consistent across administrators), and valid (measure what is intended to measure)
adaptive functioning
daily living skills (occupational, practical, social, conceptual), live independently?, assessed through questionnaire with family member
Flynn effect
IQ scores have raised on average 3 points per decade
DSM criteria for ID
deficits in intellectual functions (IQ), adaptive functions, and early onset
4 levels of severity
mild (55-70), moderate (40-55), severe (25-55), profound (<25)
mild ID
85% of ID population
typically not identified until elementary school, academic skills up to 6th grade, usually achieve some sort of independence but may need supervision
moderate ID
10% of ID population
identified during preschool, academic skills up to 2nd grade, can adapt to living in community and can usually do some kind of skill work but often need supervision in sheltered workshops
severe ID
4% of ID pop.
identified at very young age, organic cause (ex. cerebral palsey), academic skills up to preschool/kindergarten, may be able to perform tasks closely supervised, not living independently
profound ID
2% of ID pop.
infancy due to biological abnormalities, only rudimentary communication skills and basic self care (if that), life long care and assistance in supervised group homes or specialized facilities
developmental hypothesis
kids w/ IDs progress through same milestones in a similar sequence, but slower (similar structure & similar sequence hypotheses)
difference hypothesis
kids w/ IDs develop in a different, less sequential, and less organized fashion
social functioning - social isolation
emotional and behavioral problems, self injurious behavior, and pica
autism spectrum disorder (ASD)
neurodevelopmental disorder characterized by abnormalities in social communication and unusual behavior and interests, Kanner 1943 —> first described, infantile autism (within oneself), refridgerator parents (ASD caused by “cold” parents)
DSM 5 features of ASD
a) deficits in social communication and interaction (need all three) → deficits in reciprocity, nonverbal communication, and developing and understanding relationships
b) restrictive and repetitive behaviors (need 2) → repetitive motor movements/use of objects/speech, insistence on sameness (routines), fixated interests, and sensory processing differences
core deficits - social interaction
atypical processing of faces and facial expressions, difficulty maintaining eye contact, poor joint attention, more response to caregiver than others
core deficits - social communication
protoimperative (using gestures to get what you want) vs. protodeclarative (direct someones attention to object of interest) gestures
ASD kids use protoimperative more, 30-40% develop no functional language, pronoun reversal, poor pragmatic language
restricted and repetitive interests
explosive reactions to minor changes in routines, preoccupation with unusual objects/parts of objects, echolalia (immediate vs delayed), self stimulator behaviors, sensory over-responsitivity
associated characteristics
70% have IDs, limited pretend play, Sally Anne test (theory of mind), most have comorbid disorders
communication disorders
deficits in language, speech, and communication
includes language disorder, speech sound disorder, childhood onset fluency disorder, pragmatic language disorder
specific learning disorder
achievement test results that are substantially below whats expected for age and schooling
phonemes
elementary vowel and consanant sounds
morphemes
smallest units that stand for objects, events, ideas, characteristics, or relationships
phonology
learning and storing phonemes and rules for combining them, deficits strongly linked to comm and learning disorders
phonological awareness
recognizing relationship between sounds and letters, detecting rhyme and alliteration, an awareness that sounds can be manipulated within syllables in words
causes of IDs
organic (biological), cultural familial(no clear cause, overrepresented by low SES)
4 major risk factors
biological (chromosomal abnormalities, parent age, prematurity, maternal infection), social (poverty, malnutrition, lack of prenatal care), behavioral (parental substance use, abuse/neglect), educational (lack of early intervention, parents disability, lack of preparation for parenthood)
down syndrome
most common disorder resulting from chromosomal abnormality, incidence increases with maternal age
fragile x syndrome
most commonly inherited, large forehead, prominent jaw, low portruding ears, many also meet criteria for autism
prader willi syndrome
involuntary urge to eat, incomplete sexual development, low muscle tone
angelmann syndrome
ataxia, hand falpping, seizuers, large jaw, open mouthed posture
phenylketonuria
lack liver enzymes to convert phynylalanine into tyrosine, accumulates in body and converted into phenypyruvic acid, causes brain damage
fetal alcohol spectrum disorder and syndrome
FAS most severe type, teratogen, brain damage, characterized by CNS dysfunction, typically mild ID
treated for IDs
prenatal education and screening, early intervention, behavioral treatment, family strategies
causes of autism
risk factors - preterm birth, bleeding during pregnancy, preeclampsia, older parents, materal substance use, maternal fever
genetics
brain abnormalities
treatment for ASD
no known cure, therapy
discrete trial training: stimulus → response → consequence
early intervention
childhood onset schizophrenia
progressive neurodevelopmental disorder, gradual onset, symptoms persist into adolescence and adulthood, more severe adult form
DSM definition of COS
psychotic disorder involving disturbances in thinking, perceptions, speech, emotions, and behavior
a) core symptoms (2 or more for one month) - delusions, hallucinations, disorganized thinking (speech) (must be one of first three), grossly disorganized behavior, negative symptoms (absence of something typical)
b) causes impairment in work, school, firendships, and self care
c) continuous signs for 6+ months
defining features of COS
affect flattening, alogia (not much talking), avolition (lack motivation)
causes of COS
strong genetic contribution, enlarged ventricles and gray matter shrinkage, maternal diabetes, low birth weight, communication deviance, longer duration of untreted psychosis associated with poorer outcomes
treatment for COS
antipsychotic medications, education of person about their illness, support groups and social skills training, CBT, token economy
language disorder DSM criteria
a) persistent difficulties in acquiring and using language to communication (reduced vocab, limited sentence structure, impairments in discolsure)
b) abilities must be substantially below those of peers and result in functional limitiations
c) onset in developmental period
d) not due to sensory, motor, medical problems, or ID
speech sound disorder DSM criteria
a) difficulty with speech sound production that interferes with intelligibility
b) functional limitations
c) onset during developmental period
50-70% have hiswtory of LD
risk factors of speech sound dis.
deficits in phonological awareness related to problems in functional connections between brain regions, less activity in left temporal region, parental speech and language stimulation may affect pace and range of language development
treatment for speech sound dis.
promote language competencies, adjust environment to accommdate childs needs, therapy (SLP)
childhood onset fluency disorder (stutter) DSM criteria
disturbances in fluency and time patterning of speech that are developmentally inappropraite and characterized by:
repetition, prolonged sounds, broken words/pauses, blocking, circumllocutions, excess physical tension, early onset, anxiety
treatment for stutter
teach patients to slow down and use short simple sentences, contingency management, breathing regulation
social (pragmatic) comm. disorder DSM criteria
persistent difficulties in using language for social purpose, changing communication to match situation, problems following rules of language, difficulties making inferences, functional limitations, early onset
specific learning disorder
diagnosed when math, reading, writing fall below peers, 1.5 SD below peers, associated with emotional/behavioral problems, misdiagnosed as ADHD, ID, or ODD
reading LD
inability to distinguish or separate sounds in words spoken, phonics (slower) vs. whole word (faster) teaching, reversals, transpositions, inversions, omissions, dyslexia
writing LD
problems in spelling, grammar, punctuation, organization, shorter, less interesting, and poorly organized essays, also called dysgraphia
math LD
difficulties in number sense, memorization, fluency calculation, reasoning, also called dyscalculia
treatment for SLDs - rearly, comprehensive, ongoing, RTI (response to intervention), CBT
successful reading progrmas- direct instruction, teach reading and spelling in coordination, intensive (3+ yers), teach for automaticity to increase fluency