PSY210H1 Lecture Notes - Lecture 7: Biological Determinism, Epigenetics, Phenotype
Document Summary
A lot of developmental psych research relies on these quasi- experiments. A lot of development occurs over a long period of time, therefore putting strains on measurement and experimentation: ex. Start with a group of 100 grade 1s. By grade 5, you"ve lost half of them they"ve moved, gotten sick, etc. People also change a lot over long periods of time, introducing experimental confounds. One of the solutions to this is a longitudinal study: two ways you can do this, correlational. Consistency of behaviour across a set of measures. Experimental, aka, intervention study introduce some manipulation of iv at one point in development and track affect on dv through different points in development. Attrition problem subject pool goes down. Repeated testing alters behaviour your very attempt to test them over a long period of time gives them lots of opportunity to figure out what you"re trying to do and thwart your experiment.
