Developmental Research

2. Methods of developmental research:
Longitudinal
Cross sectional
Cross sequential

3.  Definition:
a correlational research study that involves repeated
observations of the same items over long periods of
time
 Usage:
1) in psychology
2) in medicine

4.  Advantages:
 Disadvantages:
1) The length of time it takes to complete the study
2) The lack of control, randomization, and
standardization
3) Less power to detect causal relationships than do
experiments
More power than cross-sectional studies by virtue of:
1) Excluding time-invariant unobserved individual
differences
2) Observing the temporal order of events

5.  Some types of longitudinal studies:
1) Panel studies
2) Cohort studies
3) Record linkage studies
4) Retrospective studies

6. Cross Sectional Study:
 Definition:
Cross sectional study forms a class of research methods that
involves observation of some subset of a population of items
all at the same time, in which, groups can be compared at
different ages with respect of independent variables.
 Usage:
in most branches of science such as social sciences

7. Advantages:
simple and quick to perform
Disadvantages:
the assumptions can be invalid due to the differences
between the age ranges

8. Difference between cross-sectional
and longitudinal study
Cross-sectional studies
take place at a single
point in time
Longitudinal study
involves a series of
measurements taking over
a period of time

9.  Definition:
Cross sequential is a comparison of two separate but equivalent
longitudinal studies, each covering a different period of time
It combines both longitudinal and cross sectional methods in an
attempt to both shorten the length of the research and minimize
developmental assumptions

10. Thanks for your attention