Developmental Psychology: The Child
Professor Kendall Soucie
June, 4, 2012

Case Study: Focusing on the Biosocial, Cognitive and Psychosocial Development of a Child Age 2

Subject Name: Robert Brandon Lee Lewis Jr.
Age: 2

Biosocial Development Robert, or Berto as his mother calls him, stands at about 3’ 3” which puts him in the 86th percentile and weighs about 39lbs which also puts him in the 97th percentile for children of his age, weight and gender. This gives him a BMI of 18.1 which is consider to be in the overweight range for his age, weight, and height, but he doesn’t appear to be chubby, so I believe that the BMI calculator isn’t accounting for his muscle tone. As a biracial child, he has inherited many recessive and dominant traits and surprisingly even an observable incomplete-dominance trait with his eye pigmentation. His eyes are two different colours; blue, which is caused by homogenous recessive alleles, usually represented by two lower case b’s (bb) and hazel, which is an incomplete-dominant trait which can be represented by an upper case ‘B’ and lower case ‘b’ (Bb). His hair is very curly which is caused by a dominant allele, but is also blonde which is caused by homogenous recessive alleles. As a baby, Robert got all of his scheduled shots but repeatedly got ear aches which were easily treated with ear drops; this was probably caused by his premature birth. He was born on March 2, 2010, almost 4 weeks early. In his first year of life, he developed faster than the average child. He began to walk at 7 months, whereas the average child starts to walk between 9 and 12 months. He said his first word, “mama,” with meaning at 6 months whereas most children will babble after they’re 4 months old, but they don’t attribute meaning to words until they’re 12 to 17 months. Then at about 26 months, he began to mimic people with his first