Research Methods & Stereotypes Flashcards
Give an example of a longitudinal study by Snowden 1986?
The nun study:
- group of nuns in their 70s followed until the end of their life,
- all agreed to have their brains donated
- Homogenous group: generally don’t do drugs, alcohol, similar reproductive histories
Give 3 advantages to a longitudinal study
- determine developmental trajectories to determine if and when there is a decline in certain developmental characteristics.
- can establish patterns of development
- they’re robust
What are 4 disadvantages to longitudinal studies?
- cost & time
- cross-generational problem
- practice effects
- selective attrition
What is a cross-generational problem? What effect is this similar to?
The group you’ve spent decades studying is truly unique. ex: they lived through the great depression which makes them fundamentally different than you or I. Similar to the cohort effect.
What are practice effects? Particularly important when measuring…
If you’re testing a group people multiple times, your participants might just get better at what they’re doing.
An increase, decrease or stability can be due to practice effects.
Important when testing intelligence
What is selective attrition ? How could this be applied to a graph
over time people may drop out of your study for a host of your study for a host of different reasons, so you’re losing data and its changing what you’re measuring.
Graph example: you are studying a cognitive ability and measuring 4 times every 5 years. Uptick in performance at time 4 for the blue line. You may conclude that the cognitive ability gets better. When the red line is gone, the average jumps up so therefore it’s the wrong conclusion.
What is the most efficient design proposed by Scaie (1965)?
the sequential design
What does the sequential design combine?
longitudinal and cross-sectional designs
What is the sequential design layout? Give an example
In 1980 you measure 40,50,60 year olds = cross-sectional. But you then measure that group every 10 years = longitudinal.
What are 2 advantages of sequential designs?
- allows you to cut down on time (from the last example you’re covering 50 years in 30 years)
- Can determine cohort effects: if performance is similar across 50 year olds can rule it out, if different you can to consider it
How would you test for cohort effects in this situation? Whitbourne was interested in the stability of personality. He tested groups every 11 years by bringing in another group of 20 year olds
Compare the 20 year olds
What are the pros to sequential designs? (3)
- Benefit of longitudinal design, but lower cost, takes less time
- Can test for cohort effects
- Can compare patterns of development across cohorts
What is still a con to sequential designs?
cross-generational problems
Why is it a big MAYBE to make causal claims in experimental research
If you have a group of 80 and 60 year olds. And person perception is lower for the 80 year olds, you cant say person perception declines with age because you didn’t manipulate age. You can’t randomly assign someone to be 80 or 60. Non-randomly assigned groups cannot be compared
What is a stereotype?
- A widely help but fixed and oversimplified image or idea of a particular type of person or thing