Genetic, behavioural and environmental predictors on sleep quality

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To uphold this principle, we have established simple rules that everyone must follow. To protect the community, we use quality assurance systems that help us identify rule violations.

Rule #1: Fill out all questionnaires truthfully and conscientiously (i.e. take your time to fully comprehend questions and possible answers, to read scenario descriptions, to fill in text fields, etc.).

Rule #2: Participate in studies only when you meet the participation criteria.

Rule #3: Redeem Survey Codes only if you have earned them in compliance with the rules.

Rule #4: Redeem Survey Codes directly after completing a study.

Rule #5: Rate the quality of studies objectively and in a differentiated way.

Rule #6: Do not share Survey Codes with others.

Rule #7: Do not use multiple user accounts.

Rule #8: Do not let anyone use your user account to participate in studies.

Rule #9: Do not use rule violations by others to your advantage.

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Issue found:
The link to the study appears to be broken.

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Issue found:
The study has already been closed.

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Issue found:
There was no Survey Code at the end of the study.

Note: In some cases, the Survey Code is shown already on the first page of a questionnaire or in the "pop-up" menu of the study in the Survey Ranking.

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