Purpose Of Research Design

The preparation of the design of the research project is known as ‘Research design’. It helps to make a steady progress in the research work and able to assess the progress of the research work. It is the foundation of the entire research work. This gives the backbone of the collection, measurement and analysis of data. This includes the steps necessary to be taken writing from the hypothesis to the implication of the final analysis of data. Therefore it deals with taking decision on what, why and where about the study under consideration. Also the type of data required and time required collecting the data. This also includes the different techniques used for collecting and analyzing the data. Finally, the preparation of the project report.

This also includes the time and cost and budgets include in the collection of the data and analysis.

The careful and well thought out research design is important, otherwise it will leads to misleading conclusions and thus the objective of the research may not be fulfilled. Thus the efficient research plan should be adopted before starting the research work so that it will serve the purpose of research. A good research design is characterized by efficient, flexible, appropriate, and economical in its character. It is considered that a design should avoid biases and maximizes the credibility of the data and the analysis. In many investigations show that a good design leads to minimum possible experimental errors. The good design is related to the expected results or the objective of the research problem which is under study. It considers the factors like the means of obtaining information, objective of the problem, the nature of the problem and the availability of time and money for the research work. Depending upon the nature of the objective, the design needs to give more emphasis on the important aspect of the

For example, height, income. Among these variables, they are divided into dependent variables and independent variables. The variables which depend on independent variables are called dependent variable. For example, if the height depends on age, the height become a depend variable and age an independent variable.

2.Extraneous variables: independent variables which are not related to the objective of the study but may affect the dependent variables are called as extraneous variable.

3.Control: It is termed for minimizing the effect of the extraneous variable on the dependent variables.

4.Confounded relationship: When the extraneous variable affects the dependent variable and the dependent variable is not entirely free from extraneous variables. Then they are said to be ‘confounded relation ship’.

5.Research hypothesis: It is a predictive statement that relates the independent variable to the dependent variable and to be tested by scientific methods is termed as research hypothesis. They must contain at least one independent variable and a dependent variable. The statements that are not objectively verified and the relationship between dependent and independent variables are not tested are not research