Top-down process refers to conceptually driven processes, guided by what the person brings to the task, i.e. their expectations, context, ideas, preferences and biases etc.
Perception must make use of complete information.
Gestalt psychologists believe that perception is not a direct process.
The term ‘affordance’ refers to the relationship between the actor (for our purposes the user) and the world signifying possibility for action.
Based on similarity theory, we organise the objects we see on the basis of what is near to what.
Good understanding of the attention grabbing mechanisms allows the designer to design better interfaces.
Based on Ecological approach, we perceive information directly from our environment.
Based on Gestalt psychologists we use world knowledge to recognise objects around us.
Proximity is one of the Gestalt Principles of grouping.
We can only focus our attention on one thing at a time.