Essay from the year 2016 in the subject Psychology - Animal Psychology, grade: 1, Egerton University, language: English, abstract: Child development appears to be one of the most studied phenomena of human development, especially with regard to cognitive and biopsychology. In the nineteenth century, child development attracted both philosophers and psychologists and, this can be attributed to the intrinsic nature of the topic because; it encompassed numerous mysteries and controversy. Ordinarily, childhood is usually accompanied by transient developmental changes, which are governed by the childs inherent biological characteristics and the ambient social conditions in the neighborhood. As such, the phenomena of childs development can be approached from diverse perspectives and this was the case in the early nineteenth century when a number of prominent scholars studied the issue and hypothesized different theories on child development. For instance, Jean Piaget and Lev Vygotsky were among the most prominent scholars who contributed significantly to the advancement of studies on child development through postulating reliable theories although their principal postulates exhibit variations.