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Field
Last Published
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Before
October 02, 2023 04:59 PM
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After
October 03, 2023 12:36 PM
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Field
Planned Number of Clusters
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Before
Our total sample size will be n=2,400.
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After
Our total sample size will be n=2,000.
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Field
Planned Number of Observations
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Before
Our total sample size will be n=2,400.
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After
Our total sample size will be n=2,000.
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Field
Sample size (or number of clusters) by treatment arms
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Before
A quarter of the participants will be assigned to the "perception" treatment (n=600), a quarter of the participants to the "purge" treatment (n=600), a quarter of the participants to the "combined" treatment (n=600), and the last quarter of the participants to the control group (n=600).
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After
A quarter of the participants will be assigned to the "perception" treatment (n=500), a quarter of the participants to the "purge" treatment (n=500), a quarter of the participants to the "combined" treatment (n=500), and the last quarter of the participants to the control group (n=500).
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Field
Power calculation: Minimum Detectable Effect Size for Main Outcomes
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Before
We conducted a preliminary pilot study with a sample size of n=147, during which we observed significant effect sizes concerning our primary outcome, which pertains to the SAR Transparency. Specifically, the effect size approached 0.485 when comparing the "perception" group to the control group. This observed effect is substantially larger than our initial expectations, taking into account that we assume a level of statistical test equal to 0.05. Nevertheless, we plan to employ a larger sample size to determine effects across all our primary outcomes comprehensively. Additionally, this larger sample size will provide us with adequate statistical power to detect effects, considering the multitude of tests we intend to conduct.
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After
We conducted a preliminary pilot study with a sample size of n=147, during which we observed significant effect sizes concerning one of our primary outcomes, which pertains to the Perception of Corruption of the SAR. Specifically, the effect size approached 0.485 when comparing the "perception" group to the control group. This observed effect is substantially larger than our initial expectations, taking into account that we assume a level of statistical test equal to 0.05. Nevertheless, we plan to employ a larger sample size to determine effects across all our primary outcomes comprehensively. Additionally, this larger sample size will provide us with adequate statistical power to detect effects, considering the multitude of tests we intend to conduct.
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