Dropdown (dropdown list)

"Select a region" - a click, and a list of 85 options expands. "Year of birth?" - a choice from a range. The options stay hidden until the click - that is a dropdown.

It is a variant of a closed-ended question with a single choice. It saves screen space - instead of a long list, a single line. In SurveyNinja it is a separate element, the "Dropdown". Handy for regions, years, and long lists. But on mobile it is an extra tap, and not everyone likes picking "blind". Below - when a dropdown is justified and when radio buttons are better.

A dropdown produces the same data as a single choice with radio buttons - one variable with discrete values. The difference is in the interface: compactness vs. seeing all options at once. In the SurveyNinja builder the dropdown is a separate element, so you do not need to set up radio buttons with a long list.

Options stay hidden until the click

Dropdown - a survey element in which the answer options are hidden and shown after a click (or tap). The respondent picks one option from the expanded list. It is usually used for long lists - regions, years, cities, product categories. It saves screen space: instead of 20-30 radio buttons - a single line. The result is the same as a single choice: one variable, ready-to-analyze data. On mobile devices it requires an extra tap and can be less convenient than radio buttons with scrolling.

In short: "click - list - choose" instead of "all options on the screen".

When a dropdown is appropriate

A long list: 10+ options, otherwise the screen gets overloaded. Regions, countries, years (for example 1950-2010), months, categories with many items. When the order is alphabetical or chronological - the respondent easily finds their option. When it is important to save space - for example, several short questions plus one with a long list on a single screen.

When it does not fit: 3-7 options - radio buttons will show everything at once, with no extra click. Subjective ratings where the order is not obvious - in a dropdown the "first" and "last" options can have a stronger pull because of the primacy effect and the recency effect. There is order randomization in a dropdown, but the list still expands - some options stay "below the fold" and may be perceived differently.

Mobile: an extra tap and scrolling

On a smartphone a dropdown is two actions: a tap on the field, a tap on the option. Radio buttons are one tap. With a long list, a dropdown on mobile opens a native menu - often more convenient than a long list of radio buttons with scrolling. It depends on the platform and the implementation. Check how the dropdown behaves in the preview of the survey from a phone.

If the audience is mostly mobile and there are 5-10 options - radio buttons are usually more comfortable. If there are 30+ options - a dropdown can win thanks to its compactness.

In SurveyNinja: the "Dropdown" element

In the SurveyNinja builder there is a separate "Dropdown" element. You add options (manually or by import), set the default text ("Select a region"), and if needed turn on order randomization. The required setting works like for other elements. More details are in the element settings.

Answers are shown in the reports - percentages for each option. The Excel export gives a column with the chosen value. Handy for cross-tabulations and segmentation: region by gender, year of birth by purchase frequency.

Dropdown vs. radio buttons: what to choose

Radio buttons - all options are visible, one click. The downside - they take up a lot of space with a long list. The upside - the respondent sees the whole context, there is no "surprise" on expanding.

Dropdown - compact, convenient with 15+ options. The downside - hidden options, an extra action on mobile. The upside - a clean screen, less scrolling.

Rule of thumb: up to 7-8 options - radio buttons. From 10-15 - it is worth considering a dropdown. For critical questions (screening, demographics) - test both options on your own audience. If in doubt - radio buttons are safer: everyone sees all the options, less risk of missing one or making a mistake.

An empty default value

A dropdown usually shows a placeholder: "Select a region", "Select a year". It is important not to set a real option as the default - otherwise the respondent may skip the choice, thinking they have already answered. "New York" as the default in a list of regions - some will pick it without looking. A neutral prompt that disappears after the choice is better. In SurveyNinja the placeholder is set in the element - the text shown before the choice.

Alphabetical and logical order

For long lists the order helps the search. Regions - alphabetical. Years - chronological (from new to old or the other way around). If the order is not obvious - randomization reduces the position effect. But with an alphabetical order randomization gets in the way - the respondent looks for "New York" with their eyes and gets lost in a shuffled list. Randomize only where the order carries no meaning.

Typical mistakes

A dropdown for a short list. Three options - Yes / No / Not sure - radio buttons are better. A dropdown creates extra friction with no gain.

No check on mobile. A list of 50 regions - fine on desktop, but on a phone it can glitch or be inconvenient. Always check in the preview.

A default value that is a real option. Do not set "New York" as selected by default - the respondent may not notice and leave it. Only a neutral prompt.

A list that is too long with no search. 100+ options in a dropdown - the respondent scrolls and loses patience. If the platform supports searching the list - turn it on. Or break it into groups (macro-regions, then the items).

Case: a survey by region - 2,000 responses

A B2B survey: "In which region is your company located?" - 85 regions. Radio buttons - one and a half screens of scrolling. We switched to a dropdown - one screen, faster. With 2,000 responses we compared the completion time: with the dropdown it was 8% faster on average. On mobile (30% of traffic) - almost no difference, but there were no complaints either. For a long fixed list the dropdown worked.

The link with the closed-ended question

Summary

A dropdown is a variant of a closed-ended question with a single choice. The same principles: a complete list of options, mutually exclusive, exhaustive where possible. Adding "Other" with a text field - if the list may be incomplete. For quantitative surveys a dropdown gives structured data with no extra processing. Reports and export are the same as for a single choice: percentages, cross-tabulations, one column in Excel.

A dropdown in SurveyNinja is a builder element with placeholder, option-order, and randomization settings. It fits surveys with long reference lists - regions, years, categories.

A dropdown is a compact single choice from a long list. The options stay hidden until the click. It is convenient for regions, years, and long categories. On mobile - check the usability. In SurveyNinja it is the "Dropdown" element in the builder.