This is how the journal describes itself:

ACM Transactions on Computer-Human Interaction (TOCHI) covers the software, hardware and human aspects of interaction with computers. Topics include hardware and software architectures; interactive techniques, metaphors, and evaluation; user interface design processes; and users and groups of users. Those within the artificial intelligence, object-oriented systems, information systems, graphics and software engineering communities, will benefit from the high quality research papers in TOCHI concerning information and ideas directly related to the construction of effective human-computer interfaces.