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Based on the provided text, describe the basic physical method used for conducting simple random assignment in a study with two conditions, and explain the computer-based method used when a study has three conditions.
Question: Based on the provided text, describe the basic physical method used for conducting simple random assignment in a study with two conditions, and explain the computer-based method used when a study has three conditions.
Sample answer: For a study with two conditions, the basic method is to flip a coin for each participant, where landing on heads assigns the participant to one condition and tails assigns them to the other. For a study with three conditions, researchers can use a computer to generate a random integer between and for each participant and place them into the corresponding group.
Key points:
- Flipping a coin for each participant in a two-condition study.
- Assigning to one condition on heads and the other on tails.
- Using a computer to generate random integers between and for a three-condition study.
- Placing participants in the corresponding group based on the generated number.
Rubric: Students should receive full credit if they correctly describe the coin-flipping method for two conditions (with heads/tails mapping to the different conditions) and the computer random-integer generation method (generating a number between and ) for three conditions.
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Research Methods in Psychology - 4th American Edition @ KPU
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