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Research is an art aided by skills of inquiry, experimental design, data collection, measurement and analysis, by interpretation, and by presentation. A further skill, which can be acquired and developed, is creativity or invention. 2 Also Noltingk (1965) believes that Research is in essence an investigation into processes. 3 Therefore a research is the finding of answers related to the questions. It is a systematic search for truth, finding new knowledge about our world through combination of ideas and facts. 2.3. ESSENTIAL QUALITY OF RESEARCH A good research must meet the validity and reliability that are most important in evaluating a measurement tool of a research. 2.3.1. Validity It can be stated that a research has highly validity if the study only contains what one wants to study and nothing else. Validity refers to how well the data collection and data analysis of the research captures the reality being studied. In other words the researcher must obtain the reality of responses of those people who are under the test through comparing their responses with such truth that in deed is truth. 2.3.2. Reliability Supposes that if other person were to repeat a specific research study, he should be able to capture the same results. Reliability demonstrates that the operation of a study, such as the data collection procedures, can be repeated with the same outcome. The objective is to ensure that if a later researcher followed exactly the same procedures as described by an earlier research and conducted