Longitudinal design
Methods
Most studies are snapshot: bhv/thoughts at one particular moment in time.
But time important in human experience:
Change over time = how we are at one moment in time might not be
representative of how we are at a later date
treat "time" as one of their independent variables (IV). They test people at
different points in time
Treatment : impact of following a course of treatment for a certain amount
of time.
recruit a group of people at the same point in time - the COHORT.
At start: baseline data
several TEST POINTS over the period of the study when the same data is
collected again
End: final test point
- observation, psychometric or biometric tests, interviews
Retrospective (or historic): cohort who all ended up the same way
Methods
Most studies are snapshot: bhv/thoughts at one particular moment in time.
But time important in human experience:
Change over time = how we are at one moment in time might not be
representative of how we are at a later date
treat "time" as one of their independent variables (IV). They test people at
different points in time
Treatment : impact of following a course of treatment for a certain amount
of time.
recruit a group of people at the same point in time - the COHORT.
At start: baseline data
several TEST POINTS over the period of the study when the same data is
collected again
End: final test point
- observation, psychometric or biometric tests, interviews
Retrospective (or historic): cohort who all ended up the same way
