Public opinion surveys ahead of the 2020 election were the most inaccurate in 40 years.
In trying to ascertain why, the American Association for Public Opinion Research noted that 2020 was not like 2016, when the failure to include enough low education voters led to an undercounting of Trump supporters.
Instead, the issue with 2020 was that some voters (Trump supporters) declined to participate in polls altogether. (Zitner, 2021)
Net, net poor sample selection was responsible for both errors.
Unfortunately the problem with sample selection has increased ever since people started using cell phones and the once highly reliable method of sampling via phone became obsolete. Research companies have responded by moving some polling online. But this presents its own set of problems.
In testing results from phone versus online research (the mode effect), Pew Research noted that phone respondents were more likely to give extreme responses. They also found that online survey respondents tend to favor the first answer choice while people on the phone tend to favor the last choice that they hear.
Overall, discrepancies were greater for more attitudinal questions, e.g. assessing the quality ones social life. (McGinty, 2021)
Even if you do get the correct sample, there are still a multitude of ways customer surveys can go wrong. These include not asking enough questions, asking too many questions, or asking the wrong question. Like - how likely are you to recommend us? (Dholakia, 2021)
Then there's the question of compensation. That $1 you sent me with the survey is insulting not motivating. And telling me that I will be entered in a contest makes me want to ask: "Do you get paid in lottery tickets?"
Which brings us back to the original question. Is survey data usable? And how?
Do you participate in surveys? Which ones and why? If you opt out of surveys, do you shun all surveys or just some? Have you participated in online research? Do you think you behaved differently than you would have on the telephone? Or in person (focus groups)?
Have you been paid to participate in surveys? Would it affect your participation rate if you are paid? Finally, how carefully are you looking at the data that you are using? Have you been conscious of sample size and margin of error?
Zitner, A. (2021, May 13) Trump-Biden Was Worst Presidential Polling Miss in 40 Years, Panel Says. wsj.com. Retrieved September 7, 2021, from https://www.wsj.com/articles/trump-biden-was-worst-presidential-polling-miss-in-40-years-panel-says-11620909178
McGinty, J. (2021, April 30) What Happens When Opinion Polls Move Online. wsj.com. Retrieved September 7, 2021, from https://www.wsj.com/articles/what-happens-when-opinion-polls-move-online-11619775001
Dholakia, U. (2021, May 23) The Five Biggest Mistakes Companies Make With Customer Surveys. wsj.com. Retrieved September 7, 2021, from https://www.wsj.com/articles/the-five-biggest-mistakes-companies-make-with-customer-surveys-11621632499