26 RELIABILITY AND VALIDITY Validity Research design is often divided into

26 reliability and validity validity research design

This preview shows page 25 - 27 out of 116 pages.

2.6 RELIABILITY AND VALIDITY Validity: Research design is often divided into three broad categories, according to “the amount of control the research maintains over the conduct of the research study”. These three broad categories namely: “Experimental, field and observational research. They vary on two important characteristics: Internal and External validity. The External research concerns the overall validity of the research study (Watt & Van Den Berg, 1995, p.186-194). In an Experimental research, the researcher controls the setting in which the research is been conducted and may influence the variable(s), while observing
Background image
14 the changes or no change in the variables. Thus, due to the ability to control and eliminate certain variables and conditions that may have a profound effect on the outcomes of the research, would likely improve the validity of the research. In a field research, the researcher retains control over the independent variable(s), but conducts the research in a natural setting without any control over environmental influences. On the other hand, in an observational research, the researcher can neither control the variable(s), or the research setting. This kind of research usually takes place sometime after the actual process being researched (Watt & Van Den Berg, 2002). Internal Validity describes or accounts for all factors, including those, which are not directly specified in the theory being tested, but might affect the outcome of the study. In other words, it usually concerns the soundness of the research being carried out. External validity conclusions cover the specific environment in which the research study is conducted to similar real world situations (Watt & Den Berg, 2002). In this case, a study which has a generalized conclusion could be more valuable than one whose conclusions cannot be applied outside the research environment. The research for this thesis could be considered as a field research as it is carried out among people who happen to constitute the future work force and whose responses I cannot influence in any significant manner. Furthermore, to ensure both internal and external validity believes to have used the most accurate and up-to-date literature. The right and relevant questions asked in the survey, the most feasible data collection method used, and the tools used to analyze the data are also considered to be accurate and produce valid results; the overall validity of this thesis is considered to be high. However I would argue that the internal validity of this thesis is relatively high, but the same cannot be said for its external validity. Reliability: The aim of any study I believe is to use a given procedure and reach a conclusion that will be applicable in any given environment. The primary objective should be that if a later investigation followed exactly the same procedures as described by an earlier investigator and conducted the same study all over again; this later
Background image
Image of page 27

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture