It seems that election season is usually the time for a plethora (so many that a person gets sick of them) of polls. Surveys happen all the time, for many reasons, but polls usually happen for elections. Why? Polls are aimed at the future. What do you want to happen in the future? Do you want a nuclear power station in your town? Do you want to vote for Candidate A or do you want to vote for Candidate B (occasionally the poll will be written such that a choice for “neither” is allowed)?
A survey is more of a gathering of information about what is happening right now. Do you put on your left sock first or your right sock first (Japan loves surveys of this nature)? How do you feel about the economy? Do you think that your local new pattern of “100-year” storms every four years is caused by climate change? How many pets do you have at home?
Like weather forecasts, it is often true that polls don’t get it right (surveys don’t also but that’s for a different subset of reasons). In fact, many times polls are used in the opposite manner. They are manipulated to create a desired output, recognizing that there is a “winner effect” where people have a tendency to change their minds in order to be part of the “winning” side.
Even when a poll is not deliberately manipulated to give a desired output, there are problems.
The questions must be created such that there is no inherent bias or assumption
The polls must be filled out (or answered) by a representative group of people
The people answering must have full anonymity — otherwise they may not give their honest answers.
It is more difficult than one might think to keep bias or assumptions out of questions. “How often do you beat your spouse?” is rather blatant (though I suspect it has occurred on more than one poll). “How bad do you think the economy is?” has the same inherent assumption (that the economy is bad) as the spousal question but may not be as obvious.
Many polls are multiple choice. But desired responses do not often align completely with one of the choices. The potential answers often have their own bias and assumption. If none of the answers matches what is wanted as the reply then there is a choice — don’t answer or choose the “closest”. But if your desired answer is the opposite of all of the listed possible answers then no answer is all you can do — and the poll will not reflect your opinion.
It is very hard to get a representative number of people. For elections, they not only need to represent the variety of people voting in appropriate percentages but they must also be people who are going to vote. Younger generations often do not use phones for audible conversations so a phoned poll will be out-of-balance with leaving out many younger people (hopefully active voters). Although becoming less a problem as the technology continues to be more established, older people may be left out of polls if the polls are done via online methods. So, do both. But then the “middle” group may be over-represented.
Legal voters don’t necessarily all feel comfortable in thinking about more complex issues in languages other than their home language. But polls (and surveys) cannot be created in ALL potential languages and polls are more unlikely to be answered if there is any struggle to complete them.
We have many different physical, economic, ethnographic, and other areas of the country. Each has their own history and perspective so all must be represented in the polls. Very difficult.
Finally, anonymity. In many countries, honest answers can be dangerous if the answers can be attributed to specific people. But even in honest democracies, attributed answers may result in unpleasant results (such as being bombarded with pleas for election money) if the person can be connected with the response. The answer may not be private within the house (or other physical location) and there may be intimidation or pressure to answer in a way not truly desired.
Surveys can have the same types of problems but, since they deal with current existing issues, can change without causing the “chicken and egg” situations.
The bottom line is that polls can only be treated as potential approximations. Their results should not be used to guide a person’s actions or expectations. If the poll results reinforce your opinions then be pessimistic and if they are contrary to your opinions then try even harder.
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