Registered Reports | Nature Human Behaviour (original) (raw)

Author and reviewer guidelines

A Registered Report is a form of empirical article offered at Nature Human Behaviour in which the methods and proposed analyses are pre-registered and peer reviewed prior to research being conducted. High quality protocols are provisionally accepted for publication before data collection commences. This format is designed to minimize publication bias and research bias in hypothesis-driven research, while also allowing the flexibility to conduct exploratory (unregistered) analyses and report serendipitous findings.

Guidelines for authors

Initial submissions should include a description of the key research question and background literature, hypotheses, experimental procedures, analysis pipeline, a sampling plan (statistical power analysis or Bayesian equivalent), and pilot data (where applicable). Please use this template to prepare your Stage 1 submission.

Initial submissions will be triaged by the editorial team for strength of scientific advance and suitability for a broad, multidisciplinary audience. Those that pass triage will then be sent for in-depth peer review (Stage 1). Following review, the article will be either rejected, revised, or accepted in principle for publication. After acceptance in principle (AIP), the authors will proceed to conduct the study, adhering exactly to the peer-reviewed procedures. When the study is complete the authors will submit their finalised manuscript for re-review (Stage 2) and will upload their raw data, study materials, computer code (if relevant) and laboratory log to a publicly accessible file-sharing service. Pending quality checks and a sensible interpretation of the findings, the manuscript will be published regardless of the significance or direction of the results.

Stage 1: Initial manuscript submission and review

Nature Human Behaviour aims to publish research of outstanding significance. For this reason, the editors select only the most scientifically promising manuscripts for in-depth peer review. Stage 1 submissions should include the manuscript (details below) and a brief cover letter. Authors are welcome to submit presubmission enquiries for advice on the likely suitability of a study as a Registered Report. However, please note that we cannot commit to sending a manuscript for in-depth review until a complete Stage 1 submission has been evaluated by the editors.

The Stage 1 cover letter should include:

• A brief scientific case for consideration. The journal aims to publish research that represents a significant scientific advance and is of relevance to a broad, multidisciplinary audience. High-value replication studies are welcome in addition to novel studies.
• A statement confirming that all necessary support (e.g. funding, facilities) is in place for the proposed research. Note that manuscripts will be generally considered only for studies that are able to commence immediately; however authors with alternative plans are encouraged to contact the journal office for advice. Obtaining ethics approval may not be practicable or advisable at initial submission (because protocols can change substantially as a result of peer reviewer feedback). Ethics approval is required, however, before acceptance in principle is issued.
• A statement confirming that data collection will not start until acceptance in principle has been granted. Please note that we are unable to consider projects where data collection has already started or is already complete, as one of the key aims of the format is to optimize research designs before the work is carried out.
• An anticipated timeline for completing the study if the initial submission is accepted.
• A statement confirming that the authors agree to share their raw data, any digital study materials, computer code (if relevant), and laboratory log for all published results. Any restrictions on data or code availability for legal or ethics reasons should be noted, with a clear indication of how interested researchers can access them post-publication.
• A statement confirming that, following Stage 1 acceptance in principle, the authors agree to register their approved protocol on a recognized repository, either publicly or under private embargo until submission of the Stage 2 manuscript.
• A statement confirming that if the authors later withdraw their paper, they agree to the Journal publishing a short summary of the pre-registered study under a section Withdrawn Registrations.

Manuscript preparation guidelines – Stage 1

Please use this template to prepare your Stage 1 submission. Initial Stage 1 submissions should include the following sections:

Introduction

• A review of the relevant literature that motivates the research question and a full description of the experimental aims and hypotheses. Please note that following AIP, the Introduction section cannot be altered apart from correction of factual errors, typographic errors and altering of tense from future to past (see below).

Methods

• Full description of proposed sample characteristics, including criteria for data inclusion and exclusion (e.g. outlier extraction). Procedures for objectively defining exclusion criteria due to technical errors or for any other reasons must be specified, including details of how and under what conditions data would be replaced.
• A description of experimental procedures in sufficient detail to allow another researcher to repeat the methodology exactly, without requiring further information. These procedures must be adhered to exactly in the subsequent experiments or any Stage 2 manuscript can be rejected.
• Proposed analysis pipeline, including all preprocessing steps, and a precise description of all planned analyses, including appropriate correction for multiple comparisons. Any covariates or regressors must be stated. Where analysis decisions are contingent on the outcome of prior analyses, these contingencies must be specified and adhered to. Only pre-planned analyses can be reported in the main Results section of Stage 2 submissions. However, unplanned exploratory analyses will be admissible in a separate section of the Results (see below).
• Studies involving Neyman-Pearson inference must include a statistical power analysis. Estimated effect sizes should be justified with reference to the existing literature. Since publication bias overinflates published estimates of effect size, power analysis must be based on the lowest available or meaningful estimate of the effect size. For frequentist analysis plans, the a priori power must be 0.95 or higher for all proposed hypothesis tests. In the case of highly uncertain effect sizes, a variable sample size and interim data analysis is permissible but with inspection points stated in advance, appropriate Type I error correction for ‘peeking’ employed, and a final stopping rule for data collection outlined.
• Methods involving Bayesian hypothesis testing are encouraged. For studies involving analyses with Bayes factors, the predictions of the theory must be specified so that a Bayes factor can be calculated. Authors should indicate what distribution will be used to represent the predictions of the theory and how its parameters will be specified. For example, will you use a uniform up to some specified maximum, or a normal/half-normal to represent a likely effect size, or a JZS/Cauchy with a specified scaling constant? For inference by Bayes factors, authors must be able to guarantee data collection until the Bayes factor is at least 10 times in favour of the experimental hypothesis over the null hypothesis (or vice versa). Authors with resource limitations are permitted to specify a maximum feasible sample size at which data collection must cease regardless of the Bayes factor; however to be eligible for advance acceptance this number must be sufficiently large that inconclusive results at this sample size would nevertheless be an important message for the field. For further advice on Bayes factors or Bayesian sampling methods, prospective authors are encouraged to read this key article by Schönbrodt and Wagenmakers.
• Full descriptions must be provided of any outcome-neutral criteria that must be met for successful testing of the stated hypotheses. Such quality checks might include the absence of floor or ceiling effects in data distributions, positive controls, or other quality checks that are orthogonal to the experimental hypotheses.
• Timeline for completion of the study and proposed resubmission date if Stage 1 review is successful. Extensions to this deadline can be negotiated with the handling editor.
• Any description of prospective methods or analysis plans should be written in future tense.

Pilot Data

• Due to power requirements, Registered Reports represent a substantial investment of resources and time. For this reason, for studies that use novel paradigms or methods, we require that the authors provide pilot data to establish proof of concept and the feasibility of the proposed methods. Any pilot experiments will be published with the final version of the manuscript and will be clearly distinguished from data obtained for the pre-registered experiment(s).

Secondary Registrations

• The journal welcomes submissions proposing secondary analyses of existing data sets, provided authors can supply sufficient evidence (e.g. self-certification; letter from independent gatekeeper) to confirm that they have had no prior access to the data in question. Note that we do not consider systematic reviews and meta-analyses for the Registered Report format. For advice on the eligibility, authors are welcome to contact the editorial office [humanbehaviour@nature.com].

Stage 1 submissions that are judged by the editors to be of sufficient quality and scientific importance will be sent for in-depth peer review. In considering papers at the registration stage, reviewers will be asked to assess:

1. The importance of the research question(s) and relevance for a broad, multidisciplinary audience.
2. The extent to which the proposed study can satisfactorily answer the research question(s).
3. The logic, rationale, and plausibility of the proposed hypotheses.
4. The soundness and feasibility of the methodology and analysis pipeline (including statistical power analysis where appropriate).
5. Whether the clarity and degree of methodological detail is sufficient to exactly replicate the proposed experimental procedures and analysis pipeline.
6. Whether the authors have pre-specified sufficient outcome-neutral tests for ensuring that the results obtained are able to test the stated hypotheses, including positive controls and quality checks.

Following Stage 1 peer review, manuscripts will be rejected outright, offered the opportunity to revise, or accepted in principle. Proposals that meet the highest standards of importance and scientific rigour will be issued an acceptance in principle (AIP), indicating that the article will be published pending completion of the approved methods and analytic procedures, passing of all pre-specified quality checks, and a defensible interpretation of the results. Stage 1 protocols are not published in the journal following AIP. Instead they are registered by the authors in a recognised repository (either publicly or under embargo until Stage 2) and integrated into a single completed article following approval of the final Stage 2 manuscript. We have created a dedicated space on figshare to host Stage 1 protocols accepted in principle at Nature Human Behaviour and offer to upload the protocol on the authors' behalf.

Authors are reminded that any deviation from the stated experimental procedures, regardless of how minor it may seem to the authors, could lead to rejection of the manuscript at Stage 2. In cases where the pre-registered protocol is altered after IPA due to unforeseen circumstances (e.g. change of equipment or unanticipated technical error), the authors must consult the editors immediately for advice, and prior to the completion of data collection. Minor changes to the protocol may be permitted according to editorial discretion. In such cases, AIP would be preserved and the deviation reported in the Stage 2 submission. If the authors wish to alter the experimental procedures more substantially following AIP but still wish to publish their article as a Registered Report then the manuscript must be withdrawn and resubmitted as a new Stage 1 submission. Note that registered analyses must be undertaken, but additional unregistered analyses can also be included in a final manuscript (see below).

Stage 2: Full manuscript review

Once the study is complete, authors prepare and resubmit their manuscript for full review, with the following additions:

Cover letter. The Stage 2 cover letter must confirm:

• That the manuscript includes a link to the public archive containing anonymized study data, digital materials/code and the laboratory log. Within the manuscript, this information should appear in two separate sections, entitled ‘Data availability’ and ‘Code availability’.
• That the manuscript contains a link to the approved Stage 1 protocol in a standalone section entitled ‘Protocol Registration’.
• That, for primary Registered Reports, no data for any pre-registered study (other than pilot data included at Stage 1) was collected prior to the date of AIP. For secondary Registered Reports, authors should confirm that no data (other than pilot data included at Stage 1) was subjected to the pre-registered analyses prior to AIP.

Submission of raw data and laboratory log:

• Anonymized raw data, any digital experimental materials (e.g. stimuli etc.), and computer code (if relevant) must be made freely available in a public repository. Authors are free to use any repository that renders data and materials freely and publicly accessible and provides a digital object identifier (DOI) to ensure that the data remain persistent, unique and citable.
• Data files should be appropriately time stamped to show that data was collected after AIP and not before. Other than pre-registered and approved pilot data, no data acquired prior to the date of AIP is admissible in the Stage 2 submission. Raw data must be accompanied by guidance notes, where required, to assist other scientists in replicating the analysis pipeline. Authors are also expected to upload any relevant analysis scripts and other experimental materials that would assist in replication.
• Supplementary figures, tables, or other text (such as supplementary methods) should be included as standard supplementary information that accompanies the paper. The raw data itself should be archived (see above) rather than submitted to the journal as supplementary material.
• A basic laboratory log must also be provided outlining the range of dates during which data collection took place. This log should be uploaded to the same public archive as the data and materials.
• The Stage 2 manuscript must also contain a link to the registered protocol (deposited following AIP) in a standalone section entitled ‘Protocol Registration’.

Background, Rationale and Methods

• ​Apart from minor stylistic revisions, the Introduction cannot be altered from the approved Stage 1 submission, and the stated hypotheses cannot be amended or appended. At Stage 2, any description of the rationale or proposed methodology that was written in future tense within the Stage 1 manuscript should be changed to past tense. Any textual changes to the Introduction or Methods (e.g. correction of typographic errors) must be clearly marked in the Stage 2 submission. Any relevant literature that appeared following the date of AIP should be covered in the Discussion.

Results & Discussion

• The outcome of all registered analyses must be reported in the manuscript, except in rare instances where a registered and approved analysis is subsequently shown to be logically flawed or unfounded. In such cases, the authors, reviewers, and editor must agree that a collective error of judgment was made and that the analysis is inappropriate. In such cases the analysis would still be mentioned in the Methods but omitted with justification from the Results.
• It is reasonable that authors may wish to include additional analyses that were not included in the registered submission. For instance, a new analytic approach might become available between AIP and Stage 2 review, or a particularly interesting and unexpected finding may emerge. Such analyses are admissible but must be clearly justified in the text, appropriately caveated, and reported in a separate section of the Results titled “_Exploratory analyses_”. Authors should be careful not to base their conclusions entirely on the outcome of statistically significant post hoc analyses.
• Authors reporting null hypothesis significance tests are required to report exact p values, effect sizes and confidence intervals for all inferential analyses.

The resubmission will most likely be considered by the same reviewers as in Stage 1, but could also be assessed by new reviewers. In considering papers at Stage 2, reviewers will be asked to decide:

1. Whether the data are able to test the authors’ proposed hypotheses by satisfying the approved outcome-neutral conditions (such as quality checks, positive controls)
2. Whether the Introduction, rationale and stated hypotheses are the same as the approved Stage 1 submission (required)
3. Whether the authors adhered precisely to the registered experimental procedures
4. Whether any unregistered post hoc analyses added by the authors are justified, methodologically sound, and informative
5. Whether the authors’ conclusions are justified given the data

Reviewers are informed that editorial decisions will not be based on the perceived importance, novelty or conclusiveness of the results. Thus while reviewers are free to enter such comments on the record, they will not influence editorial decisions. Reviewers at Stage 2 may suggest that authors report additional post hoc tests on their data; however authors are not obliged to do so unless such tests are necessary to satisfy one or more of the Stage 2 review criteria.

Manuscript withdrawal and Withdrawn Registrations

It is possible that authors with AIP may wish to withdraw their manuscript following or during data collection. Possible reasons could include major technical error, an inability to complete the study due to other unforeseen circumstances, or the desire to submit the results to a different journal. In all such cases, manuscripts can of course be withdrawn at the authors’ discretion. However, the journal will publicly record each case in a section called Withdrawn Registrations. This section will include the authors, proposed title, the abstract from the approved Stage 1 submission, and brief reason(s) for the failure to complete the study. Partial withdrawals are not possible; i.e. authors cannot publish part of a registered study by selectively withdrawing one of the planned experiments. Such cases must lead to withdrawal of the entire paper. Studies that are not completed by the agreed Stage 2 submission deadline (which can be extended in negotiation with the editorial office) will be considered withdrawn and will be subject to a Withdrawn Registration.

Guidelines for reviewers

The review process for Registered Reports is divided into two stages. At Stage 1, reviewers assess study proposals before data are collected. At Stage 2, reviewers consider the full study, including results and interpretation.

Stage 1 manuscripts will include only an Introduction, Methods (including proposed analyses), and Pilot Data (where applicable). In considering papers at Stage 1, reviewers will be asked to assess:

1. The importance of the research question(s) and relevance for a broad, multidisciplinary audience
2. The extent to which the proposed study can satisfactorily answer the research question(s)
3. The logic, rationale, and plausibility of the proposed hypotheses
4. The soundness and feasibility of the methodology and analysis pipeline (including statistical power analysis)
5. Whether the clarity and degree of methodological detail would be sufficient to replicate exactly the proposed experimental procedures and analysis pipeline
6. Whether the authors provide a sufficiently clear and detailed description of the methods to prevent undisclosed flexibility in the experimental procedures or analysis pipeline
7. Whether the authors have considered sufficient outcome-neutral conditions (e.g. absence of floor or ceiling effects; positive controls) for ensuring that the results obtained are able to test the stated hypotheses.

Following Stage 1 peer review, manuscripts will be accepted, offered the opportunity to revise, or rejected outright. Manuscripts that pass peer review will be issued an acceptance in principle (AIP), indicating that the article will be published pending successful completion of the study according to the pre-registered methods and analytic procedures, as well as a defensible and evidence-based interpretation of the results.

Following completion of the study, authors will complete the manuscript, including Results and Discussion sections. These Stage 2 manuscripts will more closely resemble a regular article format. The manuscript will then be returned to the reviewers, who will be asked to appraise:

1. Whether the data are able to test the authors’ proposed hypotheses by satisfying the approved outcome-neutral conditions (such as quality checks, positive controls)
2. Whether the Introduction, rationale and stated hypotheses are the same as the approved Stage 1 submission (required)
3. Whether the authors adhered precisely to the registered experimental procedures
4. Whether any unregistered post hoc analyses added by the authors are justified, methodologically sound, and informative
5. Whether the authors’ conclusions are justified given the data

Reviewers at Stage 2 may suggest that authors report additional post hoc tests on their data; however authors are not obliged to do so unless such tests are necessary to satisfy one or more of the Stage 2 review criteria. Please note that editorial decisions will not be based on the perceived importance, novelty, or conclusiveness of the results.