This paper explores the life of a 15 months old child using the biophysical, psychological and the social dimensions of child development. This is done using examples of scenarios where the child might experience Erik Erickson’s trust versus mistrust using these three dimensions. According to Erik Erickson’s theory of psychosocial development, human beings undergo through eight key developmental stages in their life from infancy to old age. All these stages occur in a gradual process, meaning that one stage is succeeded by another (Ashford & LeCroy, 2010). However, it is not a must for an individual to successfully undergo through a previous stage for him or her to get into the other stage of development. According to Erickson, if an individual undergoes through a certain stage successfully, he or she has the potential of developing into a ‘whole human being’, that is, an adult who is all round. On the other hand, if an individual does not successfully undergo through a certain stage, then he or she may become fixated at later stages of life. The fixation is manifested through behavior malfunctioning or development of a weird personality (Sneed, Whitbourne & Culang, 2006). The first stage is that of trust versus mistrust. According to Erickson, this is arguably the most important stage of development because the child entirely depends on others for his or her survival. The only way used by children to communicate is through f their mouth. If they are happy, they laugh and express joy; if they are sick or frightened, they cry (Capps, 2008). If the needs of a child are met consistently by care givers, he or she develops trust in people by learning that they can actually care for him or her. When this happens, the child learns to have trust in other people later in his or her life. He or she also develops confidence and is able to form alliances with people easily. However, if the needs of the child are not met consistently or if the child is frustrated, he or she develops mistrust and may also develop a perception that the world is a hostile place where people don’t care about each other. However, parents and care givers must be careful not to give the children everything they want. This is because the children may develop some irrational behavior which may also result from lack of control on their needs and demands. If children are not taught that they cannot have everything, or if they are not denied some of their irrational demands at early age, then they grow up knowing that they are supposed to get all they want at all times (King, 2007). Biophysical Dimension Biophysical development of children has to do with the development of motor skills by children. The motor skills are categorized into gross and fine motor skills. Motor skills start developing from the head to the toes (Ashford & LeCroy, 2010). What this means is that the child first learns to stabilize the neck, then the body followed by been able to sit down. By the time the child attains the age of 15 months, he or she is able to stand or even walk. For the child to develop both gross and fine motor skills effectively, he or she must be coached, directed, controlled and encouraged through out