FRHD 2270 Lecture 4: LECTURE 4
1 Jun 2018
School
Department
Course
Professor
SEPT 26
Longitudinal Studies
• Development over time
• Long time
• Costs lots of money
• 2 time points
o 1 week, 1 year, etc
• Same individuals over time
o Ages 1, 3, and 5 years of age
• Microgenetic studies
o Micro=small=tests over days, weeks
• Sequential design
o Sequence: patters, one after the other
o Group of 5, 10, 15 year-olds over 3 years
o Each group is a cohort
o Cohort effect: differences by groups
▪ Texters vs. talking on the phone
• Disadvantages
o Cost
o Attraction (and leaving study)
o Practice effects: getting familiar with tests
Cross-Sectional Studies
• One time
• 2 cohorts x age
o 3 and 5 years
• Assume that 5 years would have responded similarly 2 years ago
o Not true
▪ Environment may have changed
Ethical Responsibilities
• Ethical: no violation of individuals
• University: REB
• Minimize risk to individual (least potential harm)
o Stress levels, discomfort in topic
• Disclosure of study
o Individual fully informed
• Avoid deception
• Anonymous or confidential
• Retain consent
o If child, parental consent
• How does it affect the family and the community
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