Final answer:
Innovative design is not a differentiating dimension between human factors and HCI as both disciplines may concern themselves with innovation. Human factors, however, uniquely emphasizes workplace safety, ergonomics, and the fit between people and technology. So option(a) is correct.
Step-by-step explanation:
Among the given options, the one that is NOT a dimension that differentiates the discipline of human factors from human-computer interaction (HCI) is that Human factors places an emphasis on innovative design. While human factors does involve the design of products and workspaces, the emphasis is on usability, ergonomics, and the fit between people and technology, rather than innovation for its own sake. Both human factors and HCI may concern themselves with innovative design, making it a shared rather than a differentiating characteristic. On the other hand, the focus on safety issues, the study of devices and technology, and the central analysis of the workplace align strongly with the human factors discipline. Human factors psychology is intimately concerned with workplace safety, ergonomics, and ensuring that technology is suited to human use, to prevent work-related injuries and improve productivity and job satisfaction.