Most who have done any study or practice in Information Architecture or design understands the importance of proper chunking of data. This relates to UI elements as way, and has brought forth the often cited chestnut that people cannot hold more than 4-6 items in working memory at one time. You need to break down information and have a thorough understanding of memory to make a good product. From 100 Things Every Designer Needs to Know About People:
Every second of every waking moment, your subconscious is dealing with roughly 40 billion pieces of information. However, only 40 percent of this information makes it to your conscious brain. What makes certain knowledge stick, then? Your brain is only capable of processing information in bite-sized chunks. Therefore, if you’re ever conveying information – whether in a presentation or an ad – make sure you don’t provide too much at once.So how much should you provide?Studies have found that four is the magic number. Obviously, it’s not always a viable option to provide information in chunks of four, but it’s always a good idea to split up whatever you’re trying to communicate into groups that contain no more than four elements.
The above is obvious, but I don’t remember seeing this issue as it’s framed below:
Your brain routinely decides what to remember and what to forget. Human forgetfulness is especially helpful when it comes to product design. If you design with forgetfulness in mind, you’ll make sure to include the important information, weaving it into the design or making it easy for people to look up.
Designing with the knowledge that your customers will forget, seems like a good UX strategy to think about when you go about creating your product.