When it comes to medical devices, users typically put more trust in a digital device as opposed to non-digital, even if the function and underlying ‘test’ is largely the same. Take pregnancy tests as an example, where many users choose to validate the test result using a digital test following the use of a non-digital initially.
So why do we trust digital devices more? Understanding the ‘why’ is important in ensuring users have a positive experience when interacting with their devices. In this article, Design Engineer Rob discusses the why, and how we can use digital technology across other diagnostic devices.
A 2020 teardown of a digital pregnancy test showed that the actual ‘test’ part uses the same paper test strip as an analogue test. The main difference found was that digital device had added sensing and process electronics that could detect a reading and display it on a small screen in the binary ‘pregnant’, ‘not pregnant’ word format. Newer tests can also indicate weeks through.
For example, Clear blue has three types of test available for purchase. 1 – analogue, 2- digital, 3-digital with date. So why is it that trust in these devices is different when the underlying test is the same and how do these factors translate to other diagnostic and healthcare devices?
In the pregnancy test, when talking about trust – you’re looking at trust in the result. This involves creating a trustworthy conceptual model in the user’s mind on how the device works, considering what builds or reduces trust at each user step can help with this. In this case, ease/simplicity of conducting the test, feedback that the test has been conducted properly, and the way the result is presented are three key areas. Between the analogue and digital devices, slight differences in these areas affect the user’s perception of the device;
HD take a lean approach to product development looking to apply the right technology, to the right situation. In both cases HD have worked on both mechanical and digital diagnostic devices in the past and have in-house examples of using digital devices to provide useful, trustworthy insights to users, if you’d like to speak to us about building trust in your own diagnostic device project, we’d love to chat.