Design guidance
Perception and attention | Memory and learning
- Use structure to assist memory and learning
- Reduce the number of information chunks that need to be kept in mind at any given time, and try not to exceed 5 as the best practice
- Where hierarchy is used, ensure the current location within the overall hierarchy is always evident and try not to exceed three levels
- Assist learning and recall through distinctive spatial positions for menu options, and be wary of the potential confusion if these positions change
- Provide an obvious mechanism that allows users to get back to their previous location or home when navigating any menu structure
- Consider the memory implication of unseen content if scrolling is required to obtain more menu items
- Support learning by ensuring that all possible actions generate suitable feedback that guides the user
- Try to ensure all actions are easily and immediately reversible, and try to constrain the availability of actions that would result in undesirable or irreversible outcomes


