This paper describes the methods and findings of the first application in laboratory conditions of analog and digital prototypes from a test designed for cognitive training for older adults. Since the content of the test privileged the cognitive processes of solving problems related mainly to sustained and selective attention, and since some studies have shown that these processes improve when the demands of the job match the capabilities of people, it was considered important to investigate the discriminatory conditions of these processes of care when older adults face interaction tasks with digital devices compared with analog devices of the same features and content. The test is designed primarily intended to serve as a pretext to collect data related to interaction design in this population, and developed from the disaggregated mental model of the interaction with a specific technological equipment, although uses conventions and implicit concepts in designing of various digital interfaces to enable intuitive navigation to other models. This process included the participation of designers and therapists supported by the philosophies of co-design and participatory ergonomics.