In an experiment, it is essential that
A) the group sizes are equal.
B) the experimental and control groups are comparable at the start of the study.
C) all participants are given a pretest.
D) the groups are equal after the manipulation.
Question 2
Which of the following is essential for a successful control-group design?
A) that the experimental and control groups be comparable at the start of the study
B) that participants be randomly selected from a general population
C) that at least three conditions are manipulated
D) that there be an equal number of male and female participants
The Hershey-Chase Experiment
Patients of all socioeconomic backgrounds should be given equal care.
Using child-sized dishes at mealtimes can help caregivers monitor portion sizes
Egg Sizes
Particle Sizes Involved in Condensation and Precipitation
Evaluating an experiment (metabolic pathway)