The idea that we have special access to our own mental states has a distinguished philosophical history. The study of human development is a detailed and varied subject. We all have personal experience with development, but it is sometimes difficult to understand how and why people grow, learn, and act the way they act. Developmental psychology is referred to the “study of progressive changes in behavior and abilities from conception to death” (Coon, Mitterer 2010). Developmental psychology is also known as human development, psychological changes, emotional changes, and perception changes that happen throughout humans and their life span.
Issues and Genetics in Developmental Psychology
There has been a numerous amount of important issues throughout the history of developmental psychology. The debate over the relative contributions of legacy and the environment is one of the oldest issues in psychology. This is often referred to nature and nurture. According to this idea, everything that we are and all of our knowledge is determined by our experience. This issue still blows up on in many areas such as in the debate on the origins of homosexuality and influences on intelligence. “Past research consisting of twin and adoption studies have shown that genetic influence substantial for most domains of developmental psychology” (Plomin, 2004). Scientists have known for years that traits such as eye color and hair color are decided by specific genes encoded in each human cell.
A second important valid issue in developmental psychology involves the relative importance of early experiences versus those that occur later in life. Are we more affected by events that occur in early childhood, or do later events play an equally important role? Early experience is the consummate critical period. A problem of particular interest is the poor state of literacy in America, and the impact of early experiences on literacy development. The amount of cognitive enrichment, verbal...