This document discusses potential sources of bias in survey research studies. It provides examples of biases that can arise from poor study funding sources, question wording, sampling methods, sample size and response rates, potential confounding variables, and overgeneralization of results. Specifically, it notes that industry funded studies may produce biased results and that questions should be neutrally worded to avoid influencing responses. Random sampling helps minimize biases compared to methods like voluntary responses. Sample sizes of at least 100 for local surveys and 1000 for national are recommended. [END SUMMARY]