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One's self-concept (also called self-construction, self-identity, self-perspective or self-structure) is a collection of beliefs about oneself that includes elements such as academic performance, gender identity, sexual identity, and racial identity. Generally, self-concept embodies the answer to "Who am I?".
Self-concept is distinguishable from self-awareness, which refers to the extent to which self-knowledge is defined, consistent, and currently applicable to one's attitudes and dispositions. Self-concept also differs from self-esteem: self-concept is a cognitive or descriptive component of one's self (e.g. "I am a fast runner"), while self-esteem is evaluative and opinionated (e.g. "I feel good about being a fast runner").
Self-concept is made up of one's self-schemas, and interacts with self-esteem, self-knowledge, and the social self to form the self as whole. It includes the past, present, and future selves, where future selves (or possible selves) represent individuals' ideas of what they might become, what they would like to become, or what they are afraid of becoming. Possible selves may function as incentives for certain behavior.
The perception people have about their past or future selves is related to the perception of their current selves. The temporal self-appraisal theory argues that people have a tendency to maintain a positive self-evaluation by distancing themselves from their negative self and paying more attention to their positive one. In addition, people have a tendency to perceive the past self less favorably (e.g. "I'm better than I used to be") and the future self more positively (e.g. "I will be better than I am now").
Psychologists Carl Rogers and Abraham Maslow were heavy influences in popularizing the idea of self-concept in the west. According to Rogers, everyone strives to reach an "ideal self". Rogers also hypothesized that psychologically healthy people actively move away from roles created by others' expectations, and instead look within themselves for validation. On the other hand, neurotic people have "self-concepts that do not match their experiences.They are afraid to accept their own experiences as valid, so they distort them, either to protect themselves or to win approval from others."
The self-categorization theory developed by John Turner states that the self-concept consists of at least two "levels": a personal identity and a social one. In other words, one's self-evaluation relies on self-perceptions and how others perceive them. Self-concept can alternate rapidly between the personal and social identity. Children and adolescents begin integrating social identity into their own self-concept in elementary school by assessing their position among peers. By age 5, acceptance from peers has a significant impact on children's self-concept, affecting their behavior and academic success.
The self-concept is an internal model that uses self-assessments in order to define one's self-schemas. Features such as personality, skills and abilities, occupation and hobbies, physical characteristics, etc. are assessed and applied to self-schemas, which are ideas of oneself in a particular dimension (e.g., someone that considers themselves a geek will associate "geek-like" qualities to themselves). A collection of self-schemas make up one's overall self-concept. For example, the statement "I am lazy" is a self-assessment that contributes to self-concept. Statements such as "I am tired", however, would not be part of someone's self-concept, since being tired is a temporary state and therefore cannot become a part of a self-schema. A person's self-concept may change with time as reassessment occurs, which in extreme cases can lead to identity crises.
Researchers debate over when self-concept development begins. Some assert that gender stereotypes and expectations set by parents for their children impact children's understanding of themselves by approximately age 3. However, at this developmental stage, children have a very broad sense of self, typically, they use words such as big or nice to describe themselves to others. While this represents the beginnings of self-concept,others suggest that self-concept develops later, around age 7 or 8. At this point, children are developmentally prepared to interpret their own feelings and abilities, as well as receive and consider feedback from peers, teachers, and family. In adolescence, the self-concept undergoes a significant time of change. Generally, self-concept changes more gradually, and instead, existing concepts are refined and solidified. However, the development of self-concept during adolescence shows a “U”-shaped curve, in which general self-concept decreases in early adolescence, followed by an increase in later adolescence. Additionally, teens begin to evaluate their abilities on a continuum, as opposed to the “yes/no” evaluation of children. For example, while children might evaluate themselves “smart”, teens might evaluate themselves as “not the smartest, but smarter than average." Despite differing opinions about the onset of self-concept development, researchers agree on the importance of one’s self-concept, which influences people’s behaviors and cognitive and emotional outcomes including (but not limited to) academic achievement, levels of happiness, anxiety, social integration, self-esteem, and life-satisfaction.
Academic self-concept refers to the personal beliefs about their academic abilities or skills. Some research suggests that it begins developing from ages 3 to 5 due to influence from parents and early educators. By age 10 or 11, children assess their academic abilities by comparing themselves to their peers. These social comparisons are also referred to as self-estimates. Self-estimates of cognitive ability are most accurate when evaluating subjects that deal with numbers, such as math. Self-estimates were more likely to be poor in other areas, such as reasoning speed.[clarification needed]
Some researchers suggest that, to raise academic self-concept, parents and teachers need to provide children with specific feedback that focuses on their particular skills or abilities. Others also state that learning opportunities should be conducted in groups (both mixed-ability and like-ability) that downplay social comparison, as too much of either type of grouping can have adverse effects on children's academic self-concept and the way they view themselves in relation to their peers.
Physical self-concept is the individual’s perception of themselves in areas of physical ability and appearance. Physical ability includes concepts such as physical strength and endurance, while appearance refers to attractiveness. Adolescents experience significant changes in general physical self-concept at the on-set of puberty, about 11 years old for girls and about 15 years old for boys. The bodily changes during puberty, in conjunction with the various psychological of this period, makes adolescence especially significant for the development of physical self-concept. An important factor of physical self-concept development is participation in physical activities. It has even been suggested that adolescent involvement in competitive sports increases physical self-concept.
Worldviews about one's self in relation to others differ across and within cultures. Western cultures place particular importance on independence and the expression of one's own attributes (i.e. the self is more important than the group). This is not to say those in an independent culture do not identify and support their society or culture, there is simply a different type of relationship. Non-Western cultures favor an interdependent view of the self: Interpersonal relationships are more important than one’s individual accomplishments, and individuals experience a sense of oneness with the group. Such identity fusion can have positive and negative consequences. Identity fusion can give people the sense that their existence is meaningful provided the person feels included within the society (e.g. In Japan, the definition of the word for self (jibun) roughly translates to “one’s share of the shared life space”). Identity fusion can also have a negative impact on one's self-concept because one's behaviors and thoughts must be able to change to continue to align with those of the overall group.
Additionally, one’s social norms and cultural identities have a large impact on self-concept and mental well-being. When a person can clearly define their culture’s norms and how that plays a part in their life, they are more likely to have a positive self-identity,leading to better self-concept and psychological welfare. One example of this is in regards to consistency. One of the social norms within a Western, independent culture is consistency, which allows each person to maintain their self-concept over time. The social norm in a Non-Western, interdependent culture has a larger focus on one’s ability to be flexible and to change as the group and environment change. If this social norm is not followed in either culture, this can lead to a disconnect with one’s social identity, which effects personality, behavior, and overall self-concept.
A small study done in Israel showed that the divide between independent and interdependent self-concepts exists within cultures as well. Mid-level merchants in an urban community were compared to those in a kibbutz (collective community). The managers from the urban community followed the independent culture. When asked to describe themselves, they primarily used descriptions of their own personal traits without comparison to others within their group. When the independent, urban managers gave interdependent-type responses, most were focused on work or school, due to these being the two biggest groups identified within an independent culture. The kibbutz managers followed the interdependent culture. They used hobbies and preferences to describe their traits, which is more frequently seen in interdependent cultures as these serve as a means of comparison with others in their society. There was also a large focus on residence, lending to the fact they share resources and living space with the others from the kibbutz. These types of differences were also seen in a study done with Swedish and Japanese adolescents. Typically, these would both be considered non-Western cultures, but the Swedish showed more independent traits, while the Japanese followed the expected interdependent traits.
Research from 1997, inspired by the differences in self-concept across cultures, suggested that men tend to be more independent, while women tend to be more interdependent. A study from 1999 showed that, while men and women do not differ in terms of independence or interdependence, they differ in their types of interdependence. Women utilize relational interdependence (identifying more with one-to-one relationships or small cliques), while men utilize collective interdependence (defining themselves within the contexts of large groups).In addition to their view of interdependence, men and women also view themselves differently in regards to several other traits that have to do with self-concept. For instance, in a study conducted in 1987, men were found to consider themselves more achievement and financially oriented as well as more competitive than their female counterparts. In contrast to this, the women were more likely to view themselves as sociable, moral, dependent and less assertive than the men. These differences potentially have an impact on the individuals subjective well being.
Gender differences in interdependent environments appear in early childhood: by age 3, boys and girls choose same-sex play partners, maintaining their preferences until late elementary school. Boys and girls become involved in different social interactions and relationships. Girls tend to prefer one-on-one (dyadic) interaction, forming tight, intimate bonds, while boys prefer group activities. One study in particular found that boys performed almost twice as well in groups than in pairs, whereas girls did not show such a difference. In early adolescence, males are more likely to have a positive physical self-concept. During this developmental stage, boys who develop early tend to have a more positive view of themselves as opposed to early developing females who view themselves more negatively. The largest difference during this developmental stage between males and females is the way they view their appearance. It is assumed at this age that a more attractive person has more social power. By the time they reach college-age, females continue to have lower physical self-concepts than males. 
Girls are more likely to wait their turn to speak, agree with others, and acknowledge the contributions of others. Boys, on the other hand, build larger group relationships based on shared interests and activities. Boys are more likely to threaten, boast, and call names, suggesting the importance of dominance and hierarchy in groups of male friends. In mixed-sex pairs of children aged 33 months, girls were more likely to passively watch a male partner play, and boys were more likely to be unresponsive to what their female partners were saying. The social characteristics of boys and girls as they develop throughout childhood tend to carry over later in life as they become men and women, although characteristics displayed as younger children are not necessarily entirely reflective of later behavior.
Several studies have shown a difference between men and women based upon their academic self-concept. In general, men are more likely to view their overall academic self-concept higher, especially in the areas of math, science and technology. Women tend to have higher perceived abilities in their language related skills. This differing view of academic abilities has resulted in an academic achievement gap in countries such as Norway. These perceived self-concepts tend to reflect the typical gender stereotypes that are featured prominently in most cultures. In recent years, more women have been entering into the STEM field, working in predominantly math and science related careers. Many factors play a role in females adjusting their self-concept to accommodate more positive views of math and science such as; gender stereotypes, family influence and personal enjoyment of the subject.  Females also tend to be more critical of their STEM abilities, leading them to require a higher level of achievement in order to have an equivalent level of self-value as their male counterparts. This leads females to, in general, be less successful in the STEM area, because a higher self-concept is associated with higher levels of achievement in that area. 
Why do people choose one form of media over another? According to the Galileo Model, there are different forms of media spread throughout three-dimensional space. The closer one form of media is to another the more similar the source of media is to each other. The farther away from each form of media is in space, the least similar the source of media is. For example, mobile and cell phone are located closest in space where as newspaper and texting are farthest apart in space. The study further explained the relationship between self-concept and the use of different forms of media. The more hours per day an individual uses a form of media, the closer that form of media is to their self-concept.
Self-concept is related to the form of media most used. If you consider yourself tech savvy, then you will use mobile phones more often than you would use a newspaper. If you consider yourself old fashioned, then you will use a magazine more often than you would instant message.
In this day and age, social media is where people experience most of their communication. With developing a sense of self on a psychological level, feeling as part of a greater body such as social, emotional, political bodies can effect how one feels about themselves. If a person is included or excluded from a group, that can impact how they form their identities. Growing social media is a place for not only expressing an already formed identity, but to explore and experiment with developing identities. In the United Kingdom, a study about changing identities revealed that some people believe that partaking in online social media is the first time they have felt like themselves, and they have achieved their true identities. They also revealed that these online identities transferred to their offline identities.
A 2007 study was done on adolescents aged 12 to 18 to view the ways in which social media impacts forming an identity. The study found that it impacted the formation in 3 different ways: risk taking, communication of personal views, and perceptions of influences. In this particular study, risk taking behavior was engaging with strangers. When it came to communication about personal views, half of the participants reported that it was easier to express these opinions online, because they felt an enhanced ability to be creative and meaningful. When it came to other's opinions, one subject reported finding out more about themselves, like openness to experience, because of receiving differing opinions on things such as relationships.
Sexual identity... is a subset of the overall self-concept.