the first advantage of this form is that they know are survey participants is one upon which the survey could meet and talk directly to the respondents. This is the great advantage of this survey method, the can exchange directly with the survey participants for the survey captures information on participant survey, for example, is the voice, the body language of the person being interviewed, which may provide more information to the interviewas they may choose to exclude the unwanted interview subjects or doesn't work with the purposes for which they are intended help area time as well as money for example they do not need to ask the blind think about the appearance of a product.
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