SurveyCTO Coding Practices
This article discuss solutions to specific but common issues in the programming language used in SurveyCTO. If you want a general introduction to how to structure your approach to programming a CAPI questionnaire or how to use best practices setting that reduce the risk of errors, then see the topic of Questionnaire Programming.
Read First
- All coding examples linked to in this section is stored in Google Drive. You can either copy that code to an Excel file, but Survey CTO allows you to pull this code using the URL of the Google Sheet directly from your own server.
Groups
Use a lot of groups but do not over use them. This means that you should always ask yourself if anything you do can be done more simplistically with a group. Although, only include a group if they fulfill one of the purposes below:
- Apply a relevance condition to multiple fields
- If you have multiple questions displayed at the same time
- Frame all the questions on a module in group. Only do this at the highest level of the survey, i.e. do not use this for sub-levels of a module.
Repeat Groups
Repeat groups are a group that is repeated 1 or multiple times. This means that most properties that apply to a regular group, also applies to a repeat group.
Choice Lists
Choice lists are the answer options an enumerator can choice from in a select one or select multiple question. They are listed in the choices in the SurveyCTO questionnaire. While the programming language ODK that SurveyCTO builds on, has very few restrictions on how you can code your options, there are choice list best practices that matters for data quality when using the data from these question in for example Excel.
The choice lists can also be populated by answers already given by the respondents.
Choice Filters
Preloading
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