Survey as a source of low quality research data

Survey is the most common way to gather information for research purposes. Gathering information is usually provided in the early stage of research procedure. The information create the basis for further activities which lead to scientific research results. The problem is that information gathered as a result of survey is exposed to the high risk of errors. Following factors generates mostly errors: the way of survey carrying out, the survey content and just by simple human factors. Researchers very rarely pay their attention to the data quality taking as an obvious that gathered information describes properly studied case. In the end of the process they get results, which are becoming basis for the conclusions. Taking that into account the questions is about the quality, of research results, which were based on the surveys. What is important, usually most publications do not contain any information about source data on the basis of which results came out. It disables the independent evaluation of the results. The goal was to investigate the scale of survey data errors, using the scientific experiment. To achieve it, authors used their own survey system, which helped them in instant verification of the respondents' answers.