FAMR 230 Lecture Notes - Lecture 4: Selma Fraiberg, Object Permanence, Fetus
27 Sep 2016
School
Department
Course
Professor
Document Summary
** low birth-weight infants weigh less than 5 pounds** Child weighs less than 90% of babies at same gestational age. **at birth, average full term newborn is 20 inches in length and 7 pounds** Physical size is related to length of pregnancy, ethnic background, sex of baby, and maternal nutrition and health. Physical characteristics of newborns: lanugo fine, soft prenatal hair vernix caseosa oily substance that protects newborn from infection fontaenls soft spots on newborn"s head. Behavior of one or more individuals is measured over time. Advantages: it shows developmental trends and changes within individuals. Disadvantages: lengthy and expensive, practice effect and attrition of subjects. People of different ages are compared over several points in time. Advantages: it reveals effects of age and cohort effects. Which research design measuring changes over time has a problem with attrition? actual exam question : answer: longitudinal design. Every spent to immunize children saves in medical costs.
