01/27/2017
NEW FEATURE: Repeating Instruments and Events
REDCap has the ability to repeat a data collection instrument or an entire event of instruments an unlimited number of times without having to specify the amount needed. This is sometimes called one-to-many data collection, in which a project can have one or more repeating parts. The repeating instruments/events feature can be enabled and set up by clicking the Enable button in the Optional Modules section on the Project Setup page.
Enabling Surveys for Repeating Instruments: If one wishes to allow survey respondents to enter their responses in a repeating fashion in survey mode alone, one must enable an optional setting near the bottom of the Survey Settings page (in the survey termination options section) *after* an instrument has been set as a repeating instrument. So it is one additional step to do after enabling the instrument itself as a repeating instrument. When the repeat survey setting is enabled, it will display a button at the end of the survey so that the respondent can choose to enter another response for the survey, thus essentially allowing them to take the survey multiple times in a row. In this way, they will be able to enter as many responses for that same survey as they need.
Reports and Data Exports with Repeating Instruments and Events: If one creates a report that contains data from a repeating instrument or repeating event, a field named 'redcap_repeat_instance' will be included that represents the instance number, which is an auto-numbered value (starting with '1') that gets incremented each time the instrument/event is repeated. And if the report contains data specifically from a repeating instrument (as opposed to a repeating event), then a field named 'redcap_repeat_instrument' will additionally be included that represents the instrument name that denotes to which instrument the row of data belongs. These two fields will only be included automatically in the report or data export if data originates from a repeating instrument or event. Note: Each repeated instance of an instrument or event will be displayed as a new row in the report or export file.
While repeating instruments/events are fully supported when using Double Data Entry with regard to data entry workflow, please see the following notice for the Data Comparison Tool: “The Data Comparison Tool does not *fully* support the Repeating Instruments and Events feature, which appears to be enabled in this project. Data can be compared (and even merged if using Double Data Entry), but it will only allow comparison and merging of Instance #1 of a repeating instrument or repeating event. Thus all other repeating data will be ignored on this page. Also, all non-repeating data can still be compared and merged.”