What determines individual qualities, can a person change them himself?

Studying the nature of a particular person, you can identify what qualities characterize a person. Their manifestations are based on the influence of individual experience, knowledge, abilities and capabilities of people. The list of biological features includes the innate characteristics of a person.
Individual psychological qualities of a person contribute to the achievement of success and excellence in a particular activity. They are determined by the social and historical practice of the individual, the results of the interactions of biological and psychological indicators.
There are different levels of abilities:

The development of the algorithm of personal qualities and abilities of people is characterized by the ability to learn new things in the mental sphere. Special features are manifested in a specific type of activity (musical, artistic, pedagogical, etc.).
Character is a set of personality traits that are manifested in different types of activity, communication and relationships with people. The development of personal qualities is formed against the background of life processes and the type of activity of people. For a more accurate assessment of the nature of people should be a detailed study of behavioral factors in specific circumstances.
The personality structure includes temperament, volitional qualities, abilities, character, emotions, social attitudes and motivation. And also separately the following qualities:
Intellectual self-improvement;
A responsibility;

Personal qualities of a person are internal perception and external manifestations. External manifestation includes a list of indicators:
congenital or acquired artistry;
attractive appearance and sense of style;
oratorical skills and distinct pronunciation of speech;
competent and sophisticated approach to non-verbal communication.

The basic qualities of a person (her inner world) can be classified according to a number of signs:
comprehensive assessment of the situation and the lack of conflicting perceptions of information;
inherent love for people;
unbiased thinking;
positive form of perception;
wise judgment.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.