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Research Design - Coggle Diagram
Research Design
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Key Attricubutes of Research design, the quality of research design can be indentified in terms of four key design attributes, internal validity, external validity, contract validity and statistical conclusion validity.
Internal Validity, examines whether the observed change in a dependent variable is caused by a corresponding change in hypethesized independent variable and bot by variables extraneous to the research context.
External Validity, generalizability refers to whether the observed associates can be generalized from the sample to the population, or to other people, organizations, contexts, or time.
Construct Validity, how well a given measurement scale is measuring the theoretical construct that id is expected to measure.
Statistical conclusion validity, examines the extent to which conclusions derived using a statistical procedure is valid.
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Popular Research Designs
Experimental Studies, studies that are intended to test cause-effect relationships in tightly controlled setting by separating the cause from the effect in time administering the cause to one group of subjects but not the other group and observing how the mean effects vary between subjects in these two groups.
True experimental design, must be randomly assigned between each group.
Quasi-experimental, if random assignment is not followed.
Field Surveys, non-experimental designs that do not control for manipulate independent variables or treatments, but measure these variables and test their effects using statistical methods.
cross-sectional field surveys, independent and dependent variables are measured at the same point in time.
Longitudinal field surveys, dependent variables are measured at a later point in time than the independent variables.
Secondary data analysis, analysis of data that has been collected and tabulated by other sources.
Case Research , an in-depth investigation of a problem in one or more real-life settings over an extended period of time.
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