PSYC 1010 Chapter Notes - Chapter 10: Breastfeeding Promotion
20 May 2018
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PSYC 1010 Chapter 10 Notes
Introduction
Contrasting Control Group
• A contrasting control group that does not receive the treatment
• To minimize any preexisting differences between the two groups, researchers randomly
assign people to the two conditions.
• Random assignment—whether with a random numbers table or flip of the coin—
effectively equalizes the two groups.
• If one-third of the volunteers for an experiment can wiggle their ears, then about one-
third of the people in each group will be ear wigglers.
• So, too, with ages, attitudes, and other characteristics
• This will be similar in the experimental and control groups
• Thus, if the groups differ at the experiet’s ed, e a surise that the treatet
had an effect.
• To experiment with breast feeding, one research team randomly assigned some 17,000
Belarus newborns and their mothers either to a control group given normal pediatric
care
• An experimental group that promoted breast-feeding
• Thus ireasig expetat others’ reast itetios Kraer et al., 2008)
• At three months of age, 43 percent of the infants in the experimental group were being
exclusively breast-fed, as were 6 percent in the control group.
• At age 6, when nearly 14,000 of the children were restudied
• Those who had been in the breast-feeding promotion group had intelligence test scores
averaging six points higher than their control condition counterparts.
• With parental permission, one British research team directly experimented with breast
milk.
• They randomly assigned 424 hospitalized premature infants either to formula feedings
or to breast-milk feedings (Lucas et al., 1992).
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