Investigators interested in the effects of nutrition on wound healing randomly assigned patients recovering from burn injuries to two groups. One group received protein supplements and the second group did not. The random assignment was used to:
A. eliminate the systematic influence of any other variable.
B. provide a control for earlier nutritional status.
C. make the groups equal in terms of the dependent variable.
D. obtain groups equal in number.
Question 2
There are several ways in which confounding extraneous variables can be controlled. Which control technique is considered the best?
A. matching
B. random assignment
C. counterbalancing
D. selection
Effects of Ro15-4513, an Alcohol Antagonist
Effects of Leptin on Obesity in Mice of the Ob Strain
Principal component analysis of blood plasma metabolites in chronic myeloid leukemia (CML) patients
Nutrient-Dense Food Choices Nutrient-dense foods provide more nutrition per calorie and fewer solid
Life Cycle Nutrition: Toddlers through the Later Years
Split-brain patients were shown composite photographs