The first row of Model A (functions 1 and 2) is called the Ego block. These functions describe the aspects of reality that a person perceives with the greatest depth and clarity and verbalizes with the greatest ease. The Ego block also describes the most natural and common states of mind and behavior styles used when interacting with other people, and also a certain perspective that a person injects into the things he says.
The information aspects that corresponds to the Ego block elements are things that a person can't help spontaneously commenting on and is comfortable discussing out loud (especially true of the leading function). If something is not right in these areas, a person can barely continue until he has spoken out about it and done something to fix the problem. When problems arise, the people who are most likely to point them out are those whose perception of that aspect of reality comes from the Ego block.
The Ego block functions require a constant stream of new information and stimulation (whether by direct experience, observation, study, or reflection) and quickly sort through this information, recognizing what is useful and necessary and what is not. When exposed to the types of information corresponding to the elements of the Ego block, a person takes immediate note and quickly forms his own attitude or opinion on the matter. He is more confident of his own judgments in these areas than of other people's, even if those people are widely accepted authorities.
The Ego block describes a person's preferred and most comfortable and natural role or "mode of operation" when interacting with other people. When a person gets to use his Ego block functions in interaction, he becomes lively and confident and exudes an air of authority and expertise. These functions also have the most endurance; a person can use them longer than other functions without getting worn out.
The Ego block functions imply a certain perspective or set of values since they are the most preferred approaches to solving life problems, giving advice, and achieving one's goals. The individual wants to see society become more like himself and wants to instill his personal philosophy or values in his work activities, his living space, and the people around him. For a person to feel needed and fulfilled, he has to see that his unique perspective is making a difference somewhere. The areas where a person is most likely to make a difference correspond to the Ego block elements.
The Ego functions are mostly indifferent to praise, since it is very hard to tell a person something about these aspects of himself that he didn't already know (and can easily describe to others).