What is development?
“The systematic continuities and changes in an individual over the course of life (Shaffer et al., 2013).”
What Causes Development? (4)
Nature & Nurture
• Genes interact with experiences to shape psychological development.
Developmental Psychologists may study… (2)
* Why a behaviour occurs from a developmental perspective
cross-sectional design (and pros and cons) (3)
Pro: indicates diff among age groups
Con: Age effects can be confounded with cohort effects (eg. History like: experience COVID, may not be related with developmental)
longitudinal design (and pros and cons) (3)
Pro: Can identify similarities in development and also individual diff
Con: attrition (ppl drop out of the study), significant resources (expensive); findings may be unique to specific cohort (don’t apply to other age groups)
sequential design (and pros and cons) (3)
Pro: Overcomes some major limitations of cross-sectional & longitudinal studies
Con: Time consuming; costly