The physical setting or the testing environment.Such biases are introduced by the researcher himself and if the researcher is not experienced in his field, he might not know that he is introducing bias in his research instrument. Sometimes new researcher uses double-barrelled sentences and makes directional and leading questions, the respondents cannot give accurate responses if the questions have not been phrased correctly. This will also help ensure that the respondents provide true responses. The research questions in the research instrument should make the respondents think before answering them. The wording of the questions should be chosen after considering the IQ level of the audience to which the instrument has to be submitted. They should not be so difficult that no one can get a clue that what it’s all about. The test question should not be too easy so that anyone can answer them easily and without any thought. The wording of the questions in your research instrument plays a vital role in determining the reliability of the research instrument. Following is a general list of the factors that can affect the reliability of the research instrument. There can be many ways in which the reliability of the instrument can be improved as well as there are several ways in which the reliability of the instrument can be poorly affected. When we say that someone is reliable, we mean that that person is honest, predictable, consistent and stable. The word reliability is used so often in our life.
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