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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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Stringfield73 Stringfield73
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6 years ago
Latona did an experiment at a military barracks over the space of a few months to examine the effect of group size on group morale. He randomly assigned soldiers to the experimental and control groups and did a pretest and posttest. Midway through the experiment, some of the soldiers were re-assigned to different stations across the U.S. causing the sample size to drop. Which source of internal invalidity does this example reflect?
 
  a. history
  b. maturation
  c. instrumentation
  d. selection biases
  e. mortality
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6 years ago
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