Abnormal notes ch 14 and 15

Process of chemical transmission of messages within

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Process of chemical transmission of messages within the brain is disrupted Deficits in GABA (huntingtons disease) o Viral infections o Immune system dysfunction Some antibodies may be dysfunctional o Environmental factors Head injury Can cause a dudden increase of amyloid plaque Chapter 15 IQ testing o What the scores mean in terms of diagnoses IQ tests have a mean of 100 and a standard deviation of 15 Score of 70 or below is the cutoff for an intellectual disability Diagnosis of intellectual disabilities Mild: 50-55-70 Moderate: 35-40; 50-55 Severe: 20-25 to 35-40 Profound: below 20-25 o Percentages in upper and lower cutoffs o Culture-fair IQ testing Intellectual disabilities o Types o Causes Biological factors ½ cause by known biological abnormalities chromosomal disorders most common know biological cause of MR is the chromosomal disorder in Down Syndrome o have 47 chromosomes rather than 46 fragile x syndrome most common genetic cause of MR
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genetic disorders
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  • Spring '07
  • peterson
  • Abnormal Psychology, Mental retardation, IQ testing, Gradual worsening loss, early onset forms, late onset forms

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Christopher Reinemann
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