Short Answer

A researcher is using the block randomization sequence from the example: Block 1 (A,C,BA, C, B), Block 2 (B,C,AB, C, A), and Block 3 (C,B,AC, B, A). If the study is unexpectedly forced to stop after enrolling exactly 5 participants, what will be the step-by-step condition assignments for these 5 participants, and what will be the final sample size for each of the three conditions?

Question: A researcher is using the block randomization sequence from the example: Block 1 (A,C,BA, C, B), Block 2 (B,C,AB, C, A), and Block 3 (C,B,AC, B, A). If the study is unexpectedly forced to stop after enrolling exactly 5 participants, what will be the step-by-step condition assignments for these 5 participants, and what will be the final sample size for each of the three conditions?

Sample answer: The first 5 participants will be assigned to conditions A,C,B,B,CA, C, B, B, C respectively (the first three from Block 1, and the next two from Block 2). This results in a final sample size of 1 for condition AA, 2 for condition BB, and 2 for condition CC.

Key points:

  • The first block A,C,BA, C, B assigns the first three participants to AA, CC, and BB respectively.
  • The second block B,C,AB, C, A assigns the fourth and fifth participants to BB and CC respectively.
  • The final sample sizes are 1 participant in condition AA, 2 in condition BB, and 2 in condition CC.

Feedback: The correct response must list the sequence of assignments for the first 5 participants as A,C,B,B,CA, C, B, B, C and state the final counts as A=1A = 1, B=2B = 2, and C=2C = 2.

0

1

Updated 2026-05-26

Contributors are:

Who are from:

Tags

KPU

Research Methods in Psychology - 4th American Edition @ KPU

Related