MEMOS: an interactive assistive system for prospective memory deficit compensation-architecture and functionality

The Mobile Extensible Memory Aid System (MEMOS) is an electronic memory aid system which was developed to support patients with deficits in the prospective memory after a brain injury. A special palmtop computer, the Personal Memory Assistant (PMA), reminds the patient of important tasks and supervises the patient's actions. The PMA communicates with a stationary care system via a bidirectional cellular radio connection (GPRS). MEMOS features structured interactive reminding impulses, a flexible task scheduling, integration of a heterogeneous group of caregivers and integration in the patient's everyday life. The bidirectional communication allows for reporting of critical situations back to a responsible care-giver, so MEMOS can be used even in a critical context. This paper describes the requirements for a memory aid system, the design and functionality of MEMOS as well as its application in the practical care of patients.