How Long Should a Survey Be? [Data]

您正在休息午休，决定打开收件箱并浏览一些电子邮件。那时，您会发现刚刚从公司购买的公司的消息。bob全站app该公司的bob全站app客户服务团队希望您填写评估购物体验的调查。

感到慷慨，您决定参加。但是，一旦您打开链接，您就会意识到该表格是50个问题，有20个开放式答案。摇头，退出页面并删除电子邮件。

对于许多中小型企业，此类案件太普遍了。调查长度可以使某些公司难以进行调查，并找到适当的平衡。如果您的调查太长，参与者将不会完成它们，甚至不会理会他们。如果他们太短，您的团队将错过机会，以了解您的见解customer base。

棘手的部分是，没有关于调查长度的硬性规则。它取决于您的行业以及目标受众。在这里，企业需要进行试验以找到适合他们的长度。

In this post, let's explore survey length and analyze some studies that explain how long your surveys should be.

A good rule of thumb is to consider your target audience and when they'll be taking the survey. Think about how much time they'll be willing to volunteer for this activity and take note of the difficulty for each question. The harder the question is, the more time it'll take to complete. For most companies, the ideal number of questions you'll want to include is less then 30.

几个来源已经测试了该理论，以确定理想的调查长度。继续阅读他们的结果。

How Long a Survey Should Be, According to 2 Studies

1. SurveyMonkey

调查猴子took a random sample of about 100K surveys ranging in length from one to 30 questions. It analyzed the average time it took each respondent to complete the survey and placed the results in the chart below.

Source:调查猴子

正如您可以看到的,av问题数量的增加erage seconds spent per question decreases. That doesn't mean that longer surveys will always provide quick answers as there are other factors that can affect this data -- type of survey, the importance of the survey, target audience, etc. However, as shown below, the average time spent on each question in surveys longer than 30 questions is almost half that of surveys with fewer than 30 questions.

Source:调查猴子

此外，随着调查花费了超过七或八分钟才能完成，完成率下降了5％至20％。而且，与学校或工作调查相关的调查，这些完成率较低。牢记这些数据，最好的调查少于30个问题和/或需要少于8分钟的时间才能完成。

2. Insights Association

The Council of American Survey Research Organizations -- which has since merged with the Marketing Research Association to form theInsights Association-- held a webinar series where Inna Burdein Ph.D. conducted a study on survey length and effort.

She created an experiment with the following five types of surveys, ranging in length and difficulty:

Source:Researchscape

她在各种条件下排名难度，例如评分（简单）与排名（困难），同意或不同意（简单）与选择一个语句（困难）。这些条件帮助她在不同程度的难度下构建了调查，从而引起了以下结果：

Source:Researchscape

As you can see, survey difficulty, and not just length, affected completion rates. One can presume that it's the difficulty of a survey that causes abandonment more so than length, since a survey of 24 easy questions has an 89 percent completion rate, while a survey of 24 difficult questions has an 82 percent completion rate.

Keeping this in mind, it might be better to simplify your survey before cutting its length. As shown in the SurveyMonkey research, it's better to maintain a survey with less than 30 questions. This way, you can incorporate some difficult questions among your easier ones to garner more interesting insights without having a large impact on your completion rate.

现在您知道您的调查应该多长时间了，该决定了survey questions。