Georgia Tech Research Institute

Card Readers (5 of 7)

Issue: Use of multiple user interfaces may cause problems for users.

Some card readers associated with kiosks have a user interface separate from the primary user interface of the machine. If users begin a transaction on the primary user interface, and are then expected to complete the transaction using a second user interface, confusion may result. If the secondary user interface does not provide the necessary accessibility features, users may have difficulty completing their transactions.

Populations Impacted: Users who are blind; users with low vision; users with cognitive impairments.

Potential Solutions:
  • Fully integrate the card reader into the primary user interface. A design where the user can complete the entire transaction through a single user interface is preferable to one where the user must switch to a different user interface for part of the transaction.

  • Notify the user when it is necessary to switch to a secondary user interface. The primary user interface should inform the user (both visually and auditorily) when it is necessary to begin using a secondary user interface on the card reader device. The user should then be able to complete the transaction without switching back to the primary interface.

  • Ensure that the secondary user interface provides all necessary accessibility features. If a secondary user interface must be used, ensure that the secondary interface also provides all necessary accessibility features.

Applicable Guidelines:
ADA-ABA - 707.5
Section 508 - 1194.31(a), 1194.31(b)