Whilst awareness of designing for accessibility is increasing, I find there is still a real skew in awareness of considering users with physical issues such as being blind, deaf, or a wheelchair user, whilst consideration of mental or behavioural illnesses (also often referred to as invisible disabilities) hover quietly in the background. As with any other illness or disability, design should not exclude any groups of users. By looking at usability for wide audiences, we make a product more useable for everybody and reduce the stigma and inconvenience for some where this is much needed.
There are many mental illnesses and behavioural issues that can make it equally difficult to interact with a service, due to the impact on concentration and attention spans, comprehension, memory and information processing. Think ADHD, MS, Alzheimers, depression, PTSD, anxiety and more.
Here are 4 simple things for you to consider in your design work to help these user groups.