Experimental Research
1. What is Experimental Research?
Most of researchers
related to science subjects such as sociology, psychology, physics, chemistry,
biology and medicine etc., use Experimental research methods to conduct
research.
In the
experimental research the researcher examines the effect of independent
variable on the dependent variable. the researcher observes the effects of
controlled conditions and non-controlled conditions on group of people.
In
psychology Experimental research is used to determine people behavior and
mental processes. It also effects of independent variables on dependent
variables in controlled environment. Moreover, experimental research can
determine a cause and effect relationship between two variables. However, the
effects of a controlled environment could not be eliminated.
2. When
did the researchers use Experimental Research?
The
researchers use Experimental Research when Time priority is priority to find
out causal relationship or causal relationship is found with consistency or
degree of the correlation is great.
There are
three major types of design
1. True-Experimental
Research Design
2. Quasi-Experimental
Research Design
3. Pre-Experimental
Research Design
1-TRUE-EXPERIMENTAL
DESIGNS
In true
experimental design the researcher selects the subjects randomly. Then
researcher makes control groups and assigns assignments to the control and
experimental groups randomly.
When researcher
decides to do an experiment follows a true-experimental
design, researcher sets a preceding criterion. The researcher decides how
many times that treatment is given to the experimental group. If there is any
pre-test, post-test, mid-test etc. What will be its duration? true-experimental
design always has greater internal validity.
2. QUASI-EXPERIMENTAL
DESIGNS
Quasi-experimental
design is basically related to constructions that already exist in the real
world. A quasi-experimental design also has controlled and experimental groups,
but the researcher did not select groups randomly. It has greater external
validity
3. PRE-EXPERIMENTAL
DESIGNS
In
pre-experimental design researcher did not select group randomly. Researcher
experiments on one group. There is no separation of controlled and
non-controlled group. Pre-experimental design has lower validity.
0 Comments