PSYC 3850 Chapter Notes - Chapter 11: Intellectual Disability, Longitudinal Study, Dementia
12 Sep 2013
School
Department
Course
Professor
Document Summary
Chapter 11 the older person with intellectual disabilities. People"s perceptions of age involve specific examples from personal experience or individual conceptualizations. Information regarding aging in populations with intellectual disabilities has been limited. Lack of clarity about identifying the elderly with intellectual disabilities. Two of the most common approaches to studying aging: cross-sectional design and the longitudinal design. Cross-sectional studies: sample subjects from several age levels (say, ages 40-49, 50-59, 60-69, and 70-79) and compare certain measures among groups. Longitudinal studies: select a single group of subjects and follow it through the years to compare behaviours at different ages. Cross-sectional design is the more convenient procedure because all subjects are assessed at approximately the same time. Problem with cross-sectional studies is that the investigator may incorrectly attribute differences to aging. Cohort differences among groups exist that are not due to aging. Problem with longitudinal studies is sample attrition composition of the sample has changed experimenter morality .
