Emotions, are very common words used in both personal and professional contexts. It is a process that it starts with a stimulus leads us to cognitive and physiological responses and then take us to behavior or action tendancies. They may arrive for a variety of reasons and the cause or stimulus is not always obvious. Sometimes it’s a characteristic of the environment that makes us feel emotionally aroused. They also need to be differentiated from related terms like moods, dispositional feelings or affect.
Affordances are possibilities for action offered by environment: objects, artifacts, technologies. This concept was created to complement the functional view with an emphasis on users’ actions, and help identify potential failures or negative effects which the other approaches have difficulty identifying.