BIO361H5 Chapter Notes - Chapter 5: Concrete Poetry, Ibm Db2, Concrete Mathematics

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In this experiment, each unit is a test that is randomly assigned to one of the 4 factor-level combos. Response = # of words correctly recalled. This study used 12 subjects (college students) (small #) To gain more observations, each subject took all 4 tests in. Abstract and concrete words were randomly selected from random order. By having each subject assigned to all 4 treatment combinations, the researchers can control the subject-to-subject variability and gain a better measure of the true treatment effects. Each unit (each test) isn"t completely randomly assigned to 1 of the 4 treatments because exactly 4 tests are assigned to each subject (restriction) This chapter focuses on experimental designs where the random assignment of units to a treatment is restricted in order to create a more efficient study. The 4 tests taken by the same person where considered to be a group or block.