15. longitudinal designs

Question 1

longitudinal studies/research

Answer 1

following the same group of individuals over an extended period of time

collecting data from them at various intervals to see changes over time

Question 2

data collection method for longitudinal designs?

Answer 2

psychometric tests
interviews
questionnaires
tasks, etc

researchers will need to recontact ppt at different time intervals to re-test them

testing methods need to be standardised

Question 3

cohort effects

Answer 3

the group of ppt being studied may not be the same or similar groups growing up in other time periods

Question 4

longitudinal studies pros and cons

Answer 4

PROS:
- study developed of the same individual over time
- removes ppt variables (acts as their own baseline)
- ppt trusts researchers more, tells them more

CONS:
- attrition (people drop out)
- creates gap in data
- society changes over time
- lowers temporal validity, which
lowers confidence in
generalizability of results
- research is time consuming for researcher and ppt