It's a class presentation

1. WELCOME TO THE PRESENTATIN

2. PREPARED FOR
Nafiz Zaman Shuva
Associate Professor
Department of Information Science & Library Management
University of Dhaka.

3. PREPARED BY
Group C (Roll:2801-2805)
Presenters:
1. Sazzadul karim 2801
2. M.M. Morshed 2802
3. Arif hossain 2803
4. Tazmul Islam 2804
5. K M Mehedi Hasan 2805
6. Md Mahmud Hasan 2806
7. Md. Rassal Mollik 2807
8. K M Saifullah 2808
9. Md. Amir Hossain 2809
10. Muhammad Ali Ajam 2810

4. PRESENTATION
ON
Experimental method
of
research

5. HIGHLIGHT OF THE TOPICS:
 Definition of research
 Methods of research
 Experimental method of research
 Aims of Experimental research
 Steps of Experimental research
 Advantages of experimental research
 Disadvantages of experimental research
 Conclusions

6. DEFINITION OF RESEARCH
 According to Mouly, “actually research is simply the
process of arriving at dependable solutions to problems
through the planned and systematic collection, analysis.
And interpretation of data.”
 Prof. Cifford Moody defines, “It comprises defining
and redefining problems; formulating hypothesis or
suggested solutions; collecting, organizing and
evaluating data; making deduction and making
conclusions and at last carefully testing the conclusions
to determine whether they fit the formulated hypothesis.”

7. METHODS
1. Qualitative Method
2. Quantitative method
3. Experimental Method
4. Survey Method
5. Delphi Study Method
6. Case Study Method

8. EXPERIMENTAL METHOD

9. DEFINITION OF EXPERIMENTALMETHOD
 The word experimental research has a range of
definitions.
 The experimental method is a systematic and scientific
approach to research in which the researcher manipulates
one or more variables, and controls and measures any
change in other variables.

10. DEFINITION OF EXPERIMENTAL METHOD
 In the strict sense, experimental research is what
we call a true experiment.
 This is an experiment where the researcher
manipulates one variable, and
control/randomizes the rest of the variables. It
has a control group, the subjects have been
randomly assigned between the groups, and the
researcher only tests one effect at a time.

11. STEPS INVOLVED IN CONDUCTING AN EXPERIMENTAL
STUDY
1. Identify and define the problem
2. Review relevant literature.
3. Formulate hypotheses and deduce their consequences.
4. Construct an experimental design
5. Conduct the experiment.
6. Compile raw data and condense to usable form.
7. Present findings and conclusions.

12. 1. IDENTIFYING THE RESEARCH PROBLEM
After deciding the topic of interest, the researcher tries to define
the research problem. This helps the researcher to focus on a
more narrow research area to be able to study it appropriately.
Defining the research problem helps you to formulate a
research hypothesis.

13. 2. REVIEW RELEVANT LITERATURE.
 In the research process, the literature review stands as the
pivotal point of all activities.
 This literature review helps researcher weather the topic is
worth studying and it provide inside into ways in which the
researcher can limit the scope to a needed area of inquiry.

14. 3. FORMULATE HYPOTHESES AND DEDUCE THEIR
CONSEQUENCES.
 It is almost impossible for a researcher not to have any
hypothesis or objectives before proceeding with his works.
Because a hypothesis or the objective shows the direction to a
researcher.
 That is why, in the experimental research the research design is
built around a tentative hypothesis or clearly defined
objectives.

15. 4. CONSTRUCT AN EXPERIMENTAL DESIGN
It represents all the elements, conditions, and relations of the
following consequences:
a. Select sample of subjects
b. Identify and control non experimental factors.
c. Select or construct, and validate instruments to measure outcomes.
d. Conduct pilot study.
e. Determine place, time, and duration of the experiment.

16. 5. CONDUCT THE EXPERIMENT.
 An experiment is typically carried out by manipulating a
variable, called the independent variable, affecting the
experimental group. The effect that the researcher is interested
in, the dependent variable(s) , is measured.
 Identifying and controlling non-experimental factors which
the researcher does not want to influence the effects, is crucial
to drawing a valid conclusion. This is often done by
controlling variables, if possible, or randomizing variables to
minimize effects that can be traced back to third variables.
Researchers only want to measure the effect of the
independent variable(s) when conducting an experiment,
allowing them to conclude that this was the reason for the
effect.

17. 6. COMPILE RAW DATA AND CONDENSE
TO USABLE FORM.
 When the experiment is impose to a specific variable, related
data should be collected and compiled in systematic way.
 After analyzing compiled data it should be condensed to a
usable form.

18. 8. PRESENT FINDINGS AND CONCLUSIONS.
 The aim of an analysis is to draw a conclusion together with
other observations. The researcher might generalize the results
to a wider phenomenon, if there is no indication of
confounding variables "polluting" the results. If the researcher
suspects that the effect stem from a different variable than the
independent variable, further investigation is needed to gauge
the validity of the results. An experiment is often conducted
because the scientist wants to know if the independent
variable is having any effect upon the dependent variable.
Variables correlating are not proof that there is causation.
Experiments are more often of quantitative nature than
qualitative nature, although it happens.

19. ADVANTAGES OF EXPERIMENTAL
RESEARCH
 As well as controlling the independent variable the experimenter
attempts to eliminate unwanted
irrelevant variables.
 Control over irrelevant variables is usually greater than in other
research methods.
 Experimental design involves manipulating the independent variable
to observe the effect on the dependent variable. This makes it
possible to determine a cause and effect relationship.
 Because of strict conditions and control the experimenter can set up
the experiment again and repeat or ‘check’ their results. Replication
is very important as when similar results are obtained this gives
greater confidence in the results.

20. DISADVANTAGES OF EXPERIMENTAL
RESEARCH
 Elimination of extraneous variables is not always
possible.
 Experimental situation may not relate to the real world.
 It may be unethical or impossible to randomly assign
people to groups.
 Unethical to deliberately deprive children of sleep.

21. THANKS TO ALL