What does Roger Fowler mean by the concept of "mind style"?

Roger Fowler (1977:103) coined the term mind-style to refer to any distinctive linguistic representation of an individual mental self, whether of a character, narrator or implied author. The impression of a mind-style is usually cumulatively conveyed through consistent linguistic choices which together cut the narrated world to a distinctive cognitive pattern... (p.311)

Routledge Encyclopedia of Narrative Theory (ed. David Herman et al.,2005)

By Mind Style, Roger Fowler makes it incorrect to confuse the concept wih "point of view" or "focalization". In literature, the writer focalizes a specific character so that we can differenciate him from the other characters.

Mind-style is the linguistic representation of an individual's mental perception of the world. To put it simply, mind-style is a description of our personal worldview. My worldview may differ from yours; individual worldviews may be based on personal knowledge, how we process information, our prejudices, our beliefs, our disabilities or challenges, our personal preferences, and even our tendencies towards a particular mode of action.

In Fowler's  own words, mind style must be a consistent and contextual demonstration of the views of the world by a character. It must do so in a way that shows

“cumulatively, consistent structural options, agreeing in cutting the presented world to one pattern or another, to give rise to an impression of a world-view”. 

Mind Style is not an easy concept to understand so let's not confuse it with focalization or point of view. They are related to it, but not the same. 

Source :  http://www.enotes.com/homework-help/what-concept-mind-style-by-roger-fowler-480998

actually mind style is a word which represent the meaning  itself . As usually we can see people with different style,the same way mind differs from people to people,from community to community even from an individual to individual. so everyone possesses different thoughts and different  interpretation of worldly things 

The way that any partiicular individual, givben his or her particular psychological makeup, perceives the world around them and expresses it through language.

Have no idea since I did not read his book

term mind-style to refer to any distinctive linguistic representation of an individual mental self, whether of a character, narrator or implied author.