PSYCH 3B03 Lecture Notes - Lecture 1: Echolalia, Dsm-5, Specific Developmental DisorderPremium
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Lecture 1 – Foundations
Defining and Identifying Abnormality
- What is abnormal behaviour/behavioural problems?
o Abnormal Behaviour
o Behavioural Disturbance
o Emotional Disorders
o Psychological Deficit
o Mental Illness
o Maladaptive Behaviour
o Developmental Disorder
- Diagnostic Systems
o Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition
o The ICD-10 Classification of Mental and Behavioural Disorders
o Systems have been devised to categorize behaviour problems; and to provide
guidelines for identification, diagnosis, and treatment
- When do we consider behaviour abnormal?
o These systems examine a range of behaviours
▪ A child fails to acquire receptive and expression language by 6 years of
▪ A 14-year-old boy believes that aliens are controlling his thoughts and
▪ A 10-year-old boy who will not leave the house without turning all the
light switches on/off 3 times each
▪ A child who is running around, flitting from one activity to another,
yelling with excitement, and cannot settle
• A child playing at recess? A 10-year-old during class?
▪ A child who is exceptionally sullen, is social withdrawn, and quick to tears
• A child who just lost his pet?
▪ A child with little use, generates nonsense words, and seems echolalic?
• A 15-month-old infant or a 14-year-old boy?
- How do we determine that behaviour is abnormal?
o We consider the following
▪ Behaviours that are not just atypical but harmful
▪ Behaviours that are developmentally inappropriate
▪ Cultural norms, gender norms, situational norms
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