This article introduces studies that have investigated on supporting older adults for learning procedures to operate home equipment in their residences. In order to solve this "learning problem" important to older adults, it is vital to make clear a cognitive mechanism of learning procedures by older adults and develop supporting methods. Especially, instructional support is one of the principal supporting methods. Therefore, it is a first research task for psychologists to investigate how writing techniques of procedural instructions support older adults for their reading comprehension of procedures. Stored basic findings of signaling effects about instructions are significant not only in contributing to solve the "learning problem", but also in contributing to construct a cognitive aging theory. Furthermore, they suggest the ideal way for basic psychological studies to make a contribution to the community.