Experimental method of Research

WELCOME TO THE PRESENTATIN

PREPARED FOR

Associate ProfessorDepartment of Information Science & Library

Management University of Dhaka.

Nafiz Zaman Shuva

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

PREPARED BY

PRESENTATION ON

Experimental methodof

research

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

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.”

METHODS

1. Qualitative Method

2. Quantitative method

3. Experimental Method

4. Survey Method

5. Delphi Study Method

6. Case Study Method

EXPERIMENTAL METHOD

DEFINITION OF EXPERIMENTAL METHOD

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.

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.

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.

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.

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.

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.

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.

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.

6. COMPILE RAW DATA AND CONDENSETO 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.

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.

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.

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.

THANKS TO ALL