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Field
Trial Start Date
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Before
March 11, 2019
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After
September 15, 2020
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Field
Trial End Date
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Before
August 31, 2019
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After
November 30, 2020
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Field
Last Published
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Before
March 12, 2019 01:18 PM
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After
September 17, 2020 06:00 AM
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Field
Intervention (Public)
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Before
The experiment is based on an online game, where prior to and during the game subjects are shown different set of recent top scores. We are interested in if their effort and performance depending on the treatment they receive: the gender of the subject's "main competitors".
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After
The experiment is based on an online game, where prior to and during the game subjects are shown different set of recent top scores. We are interested in if their effort and performance depending on the treatment they receive: the gender of the subject's "main competitors" and the level of the recent (high) scores.
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Field
Intervention Start Date
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Before
March 11, 2019
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After
September 15, 2020
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Field
Intervention End Date
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Before
August 31, 2019
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After
November 30, 2020
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Field
Randomization Unit
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Before
We use individual level randomization. Everyone who play the game is assigned to one of the treatments.
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After
We use individual level randomization. Everyone who plays the game is assigned to one of the treatments.
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Field
Planned Number of Observations
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Before
At least 600 subjects for the pilot experiment, followed by 3000 subjects for the final results.
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After
At least 800 subjects for the pilot experiment, followed by more than 4000 subjects for the final results.
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Field
Sample size (or number of clusters) by treatment arms
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Before
At least 200 subjects for each treatment groups for the pilot experiment, followed by 1000 subjects/treatment group for the final results.
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After
At least 100 subjects for each treatment groups for the pilot experiment, followed by 500 subjects/treatment group for the final results.
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Field
Intervention (Hidden)
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Before
Three different treatment groups are formed for which different recent top scores are included:
1. containing both female and male nicknames (serving as control group)
2. containing only female nicknames
3. contaning only male nicknames
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After
8 different treatment groups are formed for which different recent top scores are included:
1. containing only female nicknames with recent scores [Anna 55; Victoria 48; Petra 45]
2. containing only male nicknames with recent scores [Jozef 55; Adam 48; Paul 45]
3. containing both female and male nicknames with recent scores [Anna 55; Adam 48; Petra 45]
4. containing both male and female nicknames with recent scores [Jozef 55; Victoria 48; Paul 45]
5. containing only female nicknames with recent HIGH scores [Anna 87; Victoria 78; Petra 73]
6. containing only male nicknames with recent HIGH scores [Jozef 87; Adam 78; Paul 73]
7. containing both female and male nicknames with recent HIGH scores [Anna 87; Adam 78; Petra 73]
8. containing both male and female nicknames with recent HIGH scores [Jozef 87; Victoria 78; Paul 73]
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