虽然最常见的情况是，李克特量表包含5到7个回答选项，但有时研究人员会使用更多。 尽管如此，据观察，当向人们展示更多的响应选项时，他们往往不会在规模的两端选择响应。 也许大规模的端点选择似乎太极端了。 具有奇数个响应类别的量表的中点被认为是中性的。 如果研究人员想强迫受访者选择在问题上采用一种还是另一种方式，则可以使用带有偶数选项的量表来消除中性选项。
新加坡国立大学Research Method代写：偶数选项的量表
Although the most common case is a Likert scale with 5 to 7 answering options, sometimes researchers use more. Nevertheless, it has been observed that when people are shown more response options, they tend not to choose a response at either end of the scale. Perhaps large-scale endpoint selection seems too extreme. The midpoint of a scale with an odd number of response categories is considered neutral. If researchers want to force respondents to choose one way or another on the issue, a scale with even options can be used to eliminate neutral options.