2. THEORITICAL ERRORS
These errors occur at different stages:-
Such as choice of area of an
investigation
Assumptions about constants and
variables
Defining variables
3. CHOICE OF AREA OF STUDY
Interdisciplinary knowledge
Field of specialization
Field of full understanding
Review of earlier studies
4. ASSUMPTIONS ABOUT A STATEMENT OF
THE PROBLEM
Knowledge of variables
Operational Defination
Understanding the nature of variables
Demarcation of the role of variables
7. METHODOLOGICAL ERRORS
These are occur at different methods
in research:-
Descriptive research
Historical research
Experimental study
8. SUGGESTIONS TO AVOID ERRORS
Use appropriate method
Check the internal &external validity.
How to reduce these errors
Controlling the validity
Ex-post-facto study/casual comparative research
Method according to the objectives
Follow-up