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What are Global, Custom, and Family IDs?

Ripple ID types

Ripple uses three types of IDs to manage participants in studies:

  1. Global ID:

    • A unique hash/ID assigned globally to each participant across all studies.
    • Appears in the registry and on participant profile pages in every study.
    • Locked and unchangeable after assignment, except through the import tool, which allows updates by matching participants via First Name, Last Name, and Birthdate, and providing a new Global ID.

  2. Custom ID:

    • A study-specific alphanumeric ID to identify participants within a single study.
    • Examples: numbering participants sequentially (e.g., 1, 2, 3) or grouping them (e.g., 1001, 2002).
    • The same Custom ID can be reused in different studies but cannot be duplicated within the same study (Ripple will warn you).

  3. Family ID:

    • A Family ID used to link participants as a family.
    • Participants with the same Family ID are connected in their profiles under a "Family" section.
    • Displays shared family details such as names, studies, genders, and current ages.

These ID types ensure streamlined participant organization and tracking across studies and profiles.