What is research design? A research design is the arrangement of conditions for collection and analysis of data in a manner that aims to combine relevance to the research purpose with economy in procedure.
Research design have following parts: * Sampling design * Observational design * Statistical design * Operational design
Sampling designs Which deals with the methods of selecting items to be observed for the study.
Observational design Which relates to the condition under which the observation are to be create.
Statistical design Which concern the question of the of How the information and data gathered are to be analyzed ?
Operational design Which deals with techniques by which the procedures satisfied in sampling .
Features of a good research design:
A research design appropriate for a particular research problem, usually involves the following features. * The mean of obtaining information. * The availability and skills of the researcher and his staff, if any. * The objective of the problem to be studied. * The nature of the problem to be studied . * The availability of time and money for the research work.
Important concepts relating to research design * Dependent and independent variables: a concept which can take on different quantitative values is called a variable.
A phenomena which can take on different qualitatively values even in decimal value are called continues.
Extraneous variables * That are not related to the purpose of the study but may effect on the dependent variables are termed as the extraneous variables
Example:
Suppose a researcher want to test the hypothesis that there is a relationship between children gains in social studies achievement and their self concept.
In this case self-concept =independent variable
Social studies achievement =dependent variable
Intelligence may as well affect on the social achievement.
But it is not