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Open Science requirements

Preregistration

In a preregistration, researchers document their research question, hypotheses, data exclusion rules, data collection and analysis plans, and other important aspects of their study design before any data is collected (Nosek et al., 2018). Most steps of the research process involve flexibility (e.g., how many participants are collected, which analyses are run) that can be exploited to produce certain findings or cherry-pick results (Simmons et al., 2011). Well-formulated preregistrations can signal to readers that this did not occur, therefore increasing the credibility of results.

During the restricted access period, the database will be made available only for preregistered studies.

• Complete a preregistration for your planned study. We recommend using AsPredicted, which is simple and easy to use, or the standard preregistration template of the OSF, which provides more guidance (see here for a step-by-step guide).
• Not all elements of a preregistration template might apply to your study. The goal is to be as complete as possible, specifying all relevant elements. If no specific hypotheses are tested, this can be made explicit.
• Make sure to actually submit/publish the preregistration. To gain access to the database you need to submit a time-stamped document.

Check the FAQs for additional information, especially if you are not already a preregistration veteran.

Sharing all results

Some types of results, such as non-significant findings, are less likely to end up being published, which can lead to a biased literature (e.g., Franco et al., 2014; Scheel, 2021). To combat this “file-drawer” problem, we ask you to make a short summary of your study publicly available if it does not end up in a published paper. Specifically, we ask you to upload a document with a brief description of the study’s methods and results to a preprint repository such as PsyArXiv, SSRN, or ResearchGate. Preparing this document should not require a lot of effort given that text describing the study design is already available in the preregistration.

Exceptions

Access to the database can be granted without fulfilling the previous two conditions, but only under certain circumstances.

• If you need access because you are reviewing a study that uses the database, send an email and we will grant you access.
• If you are a collaborator on a study for which access to the database was already granted and you also want access to the database, send an email with the name of the study and we will grant you access.
• If you believe a preregistration is not applicable for the type of research you want to use the database for, first check the FAQs on the Open Science requirements. If this does not include your case, email us with an explanation.
• If you need to better understand the contents of the database before designing and preregistering a study design, you can find a detailed description of the data collection protocol [Placeholder: link to preprint]. You can also access stimuli and data for one participant, after agreeing to the terms of use, [Placeholder: link to access survey for stimulus examples].

Request access

Please send the following email with a PDF of your preregistration and the subject line “TIPPSI request” to contacttippsi@gmail.com.

Remember to attach the PDF of your preregistration before sending.

Survey

If you submitted a complete preregistration with all applicable information, you will receive a link to a survey via email. We will try to respond to your request as quickly as possible, but it may take approximately a week. In the survey, we will ask you for some information (name, institutional affiliation, email address), and you will be asked to agree to the terms of use. You will then be granted access to the database.

You may not want to download the entire database due to its size (ca. 60 GB). The database is therefore split up into different components, corresponding to different stimulus types, and you can select which components you would like to access.