Your abstract should be a brief, comprehensive summary of your paper. It should concisely describe the following: the research problem, the participants, the procedure, the major finding, and the conclusions and implications, all in less than 250 words. The abstract is on its own page, following the title page.
Move from the general to the specific.
What is the major issue being investigated? Why is the problem interesting?
What is the theoretical background for your study? That is, what has previous research about this topic shown, and what possible explanations can be found in the literature that might help you predict what the outcome will be? Make sure the articles you cite are relevant to the study at hand and that you explain explicitly how they are linked to your study.
What are the limitations of the previous work ?
What knowledge can be gained from the current work?
What is the major question ?