During this period children show fast change in social relationships. They use social comparison to distinguish themselves from others. They start seeing things from another's perspective. A child begins to weigh self-worth and increasingly compares himself/herself with peers. Children are now able to understand emotions of pride and shame and can experience more than one emotion in a given situation. They can suppress or conceal emotions more effectively and use self-acquired strategies to cope. In this period, children internalise or begin to control their values and feelings from within. They start making judgments at this age that impact moral development. Gender differences are observed during middle childhood. Girls may attach greater importance to good interpersonal relationships and the family while boys may emphasise the importance of social prestige. A prevalent problem among children of this age group is bullying. Researchers have found that bullies display certain characteristics, such as being intrusive, having demanding but unresponsive parents. Victims are often depressed and have lower self-esteem.In middle childhood, self-concept changes from a focus on observable characteristics and typical behaviour and emotions to an emphasis on personality traits, positive and negative characteristics, and social comparisons. The child begins to see his or her own strengths and limitations. This helps the move towards achievement of an identity.