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Preparing your materials

Policy on prior publication

When authors submit manuscripts to this journal, these manuscripts should not be under consideration, accepted for publication or in press within a different journal, book or similar entity, unless explicit permission or agreement has been sought from all entities involved. However, deposition of a preprint on the author’s personal website, in an institutional repository, or in a preprint archive shall not be viewed as prior or duplicate publication. Authors should follow the Cambridge University Press Preprint Policy regarding preprint archives and maintaining the version of record. 

Overleaf

Overleaf is a free online tool for writing and submitting scholarly manuscripts. An Overleaf template is available for this journal, which allows authors to easily comply with the journal’s guidelines.

Benefits of using Overleaf include:

  • An intuitive interface, in which authors can write in LaTeX or rich text and see a preview of their article typeset in the journal’s style
  • Features enabling collaboration with co-authors (the ability to share, highlight and comment on versions of articles)
  • Sophisticated version control
  • Clean PDF conversion and submission into the journal’s online manuscripts system (supporting materials can also be added during this process)

Overleaf is based on LaTeX but includes a rich text mode. An author writing in Overleaf would need to have some knowledge of LaTeX, but could collaborate through the tool with an author who is not a LaTeX expert. Overleaf’s tutorial pages include a two minute video and an introduction to LaTeX course, and Overleaf also provides support for authors using the tool.

Note: authors should flatten their image files before uploading them to Overleaf and the journal’s submission system. This can be done by using Photoshop or GIMP, an open source Photoshop equivalent, both of which have a ‘Flatten Image’ option in the Layer menu. If you are using a locally installed LaTeX editor, it’s also possible to use in-line commands to do a round-trip conversion – see this Overleaf help page for more information.

Authors can access JDM's Overleaf template here.

Article Length

JDM does not have article length restrictions. If you have concerns about the length of your manuscript, please contact the Editorial Office.

Preparing your article for submission

Manuscripts should be compiled in a single document in the following order:

  • Title page, including:
    • Authors, including Corresponding Author designation, full contact details and affiliations, including country
    • Abstract (up to 250 words)
    • Keywords (up to 10)
  • Main text, including Author names, Table(s) with caption(s) and Figures with caption(s) in place throughout
  • Acknowledgements
  • Competing Interests Statement
  • Financial Support Statement
  • Supplementary Materials
  • References

Both LaTeX and Word submissions should be accompanied by PDF files, both during the review process and in final export. 

Requirements

For empirical work, JDM requires the availability of raw data (with a key to the meaning of variable names, if needed), and stimulus materials such as questionnaire items, for review and for publication (unless this is impossible for some reason). These may be submitted as supplemental files or posted publicly somewhere else. If a submission is not rejected immediately, we will request these documents. Publications should, insofar as possible, include all key information necessary to understand (and replicate) the study and data analysis, including data, as well as stimuli, questionnaires, and code, when these are necessary to understand exactly what was done. More information, including suggestions on deposit, can be found in our guidelines on Research Transparency.

Registered Reports

A registered report is not the same as pre-registration, although that may be useful for many papers, including registered reports (see As Predicted). When submitting a registered report, please also include a separate explanation of why you are doing the study and why you want acceptance in advance. Following initial (pre-study) acceptance, authors are typically required by the action editor to register the approved protocol (e.g., on the Open Science Framework https://osf.io/rr/ or other recognised repository), either publicly or under private embargo until submission of the full manuscript with results. The full manuscript will then also contain the URL of the approved protocol.

Style guidelines

  • Be consistent in the way you report statistics. Italics for "t", etc., are not required, but if you use them then use them consistently. Likewise spacing around "="; use it or not, consistently. Use parentheses, not commas, for statistical tests, and put the at the end of a sentence or clause if possible. Minimize the number of statistics you include. 
  • Please use APA citation and reference style. (Not the rest of APA style.) This means that articles are cited by author within the text. Use "and" when citing multiple authors in the text, "et al." for three or more (unless it is important to list all authors), and "&" for citations in parentheses and for authors listed in the reference section. Do not put commas before the last "and" or "&".
  • References are alphabetical at the end, with authors initials (not names) following each author's last name (e.g., "McCaffery, E. J., & Baron, J. (2006)."---note the spaces and periods). Volume numbers are in italics following the journal name (also in italics), followed by an optional issue number in parentheses (with no space before it) and a comma. Page numbers are required for everything. Journal titles, but not book titles, have all major words begin with upper case. Examples: Judgment and Decision Making (a journal title); Thinking and deciding (a book title)
  • Spellings: "et al.", "etc.", "i.e.", followed by commas if the sentence continues. Don't use "cf." or "see". It is better to say, in a couple of words, why you are citing something, e.g., "see X for a review," "for additional supporting results," or "but see X for an opposing perspective."
  • Punctuation: Footnotes at the end of a sentence or clause come after the period or comma. Use British style for quotations: all punctuation, including commas and periods, go outside of quotation marks, unless the punctuation was itself part of the quotation.
  • Use footnotes, not endnotes.
  • Do not use the term "ratio bias". Use either "denominator neglect"
    or "proportion dominance". (The latter indicates judgments based on proportions when differences would be more appropriate.) 
  • Use 'external validity' rather than 'ecological validity' when referring to the representativeness of experimental stimuli. 
  • In a regression model, you do not usually "control" for covariates. You "adjust" for them. As explained in the statistics guidelines, the adjustment is usually incomplete. 
  • Say "almost significant", not "marginally significant". 
  • Try not to clutter the text with redundant statistics, and put all statistics from tests in parentheses, preferably a the ends of clauses. 
  • Use "subjects" or "participants" consistently, not both in the same paper. ("Subjects" is perfectly fine, even with APA.)

Statistical guidelines

Statistics is controversial, and we do not want to dictate everything when authors have a well-reasoned disagreement with conventional views or with what follows. But here is the starting point. The following checklist is about "red flags". These are not necessarily problems, but they will require examination before review. It will help if you yourself make sure that these issues will not cause problems, by reading the associated text below.

Checklist for some statistical red flags: Details below
  1. Small samples, low power, and "surprising" hypotheses
  2. Statistical control (probably the single most common issue)
  3. Multiple regression (sometimes called "econometrics")
  4. Mediation
  5. Treating ordered variables as if they were names (un-ordered categories or groups)
  6. Dichotomizing continuous measures
  7. Reporting interactions, or drawing conclusions from significant vs. non-significant
  8. Showing that your results are generally true of subjects but not looking at items

Please review our full statistical guidelines prior to submission.

English language editing services 

Authors, particularly those whose first language is not English, may wish to have their English-language manuscripts checked by a native speaker before submission. This step is optional, but may help to ensure that the academic content of the paper is fully understood by the Editor and any reviewers.  

In order to help prospective authors to prepare for submission and to reach their publication goals, Cambridge University Press offers a range of high-quality manuscript preparation services – including language editing – delivered in partnership with American Journal Experts. You can find out more on our Language Services page.

Please note that the use of any of these services is voluntary, and at the author's own expense. Use of these services does not guarantee that the manuscript will be accepted for publication, nor does it restrict the author to submitting to a Cambridge-published journal. 

Artwork, Figures, and Other Graphics

For initial submissions, please include figures, tables, and footnotes in situ in the text so that reviewers do not have to jump around too much.Tables, figures, and images must be cited in the text, for example (see Table 1). They should be numbered consecutively in Arabic numerals, and captioned. Tables should always be provided in an editable format (not as image files). In case of acceptance, all images will need to be submitted as separate figure files. For detailed information on figure preparation, please see the Cambridge Journals Artwork Guide.

Reproduction of copyright material: Authors are responsible for obtaining permission from copyright holders for reproducing any illustrations, tables, figures or lengthy quotations previously published elsewhere. A copy of the paperwork granting permission should be provided to the Cambridge production editor. You may be asked to pay a permissions fee by the copyright holder; any permissions fees must be paid for by the author. For an example of a permissions request form please see the Cambridge Journals Artwork Guide.

Competing Interests

All authors must include a competing interest declaration in their main manuscript file. This declaration will be subject to editorial review and may be published in the article. 

Competing interests are situations that could be perceived to exert an undue influence on the content or publication of an author’s work. They may include, but are not limited to, financial, professional, contractual or personal relationships or situations. 

If the manuscript has multiple authors, the author submitting must include competing interest declarations relevant to all contributing authors. 

Example wording for a declaration is as follows: “Competing interests: Author 1 is employed at organisation A, Author 2 is on the Board of company B and is a member of organisation C. Author 3 has received grants from company D.” If no competing interests exist, the declaration should state “Competing interests: The author(s) declare none”. 

Ethics and transparency policy requirements

Please review our ethics policies prior to submission as well as the journal's research transparency guidelines.

Authorship and contributorship

All authors listed on any papers submitted to this journal must be in agreement that the authors listed would all be considered authors according to disciplinary norms, and that no authors who would reasonably be considered an author have been excluded. For further details on this journal’s authorship policy, please see this journal's publishing ethics policies.

Acknowledgements

Authors can use this section to acknowledge and thank colleagues, institutions, workshop organizers, family members, etc. that have helped with the research and/or writing process. It is important that any type of funding information or financial support to be listed under ‘Financial Support’ rather than Acknowledgements so that it can easily be tagged and captured separately.

Financial Support

Please supply all details required by any funding and grant-awarding bodies as a separate section of your manuscript, as follows:

For single agency grants: "This work was supported by the [Funding Agency] under Grant [number xxxx]."

For multiple agency grants: "This work was supported by the [Funding Agency 1] under Grant [number xxxx]; [Funding Agency 2] under Grant [number xxxx]; and [Funding Agency 3] under Grant [number xxxx.]"

Where no specific funding has been provided for research, please provide the following statement:

"This research received no specific grant funding form any funding agency, commercial or not-for-profit sectors."

Author affiliations

Author affiliations should represent the institution(s) at which the research presented was conducted and/or supported and/or approved. For non-research content, any affiliations should represent the institution(s) with which each author is currently affiliated. 

For more information, please see our author affiliation policy and author affiliation FAQs.

ORCID

We require all corresponding authors to identify themselves using ORCID when submitting a manuscript to this journal. ORCID provides a unique identifier for researchers and, through integration with key research workflows such as manuscript submission and grant applications, provides the following benefits:

  • Discoverability: ORCID increases the discoverability of your publications, by enabling smarter publisher systems and by helping readers to reliably find work that you have authored.
  • Convenience: As more organisations use ORCID, providing your iD or using it to register for services will automatically link activities to your ORCID record, and will enable you to share this information with other systems and platforms you use, saving you re-keying information multiple times.
  • Keeping track: Your ORCID record is a neat place to store and (if you choose) share validated information about your research activities and affiliations.

See our ORCID FAQs for more information.

If you don’t already have an iD, you will need to create one if you decide to submit a manuscript to this journal. You can register for one directly from your user account on ScholarOne, or alternatively via https://ORCID.org/register.

If you already have an iD, please use this when submitting your manuscript, either by linking it to your ScholarOne account, or by supplying it during submission using the "Associate your existing ORCID iD" button.

ORCIDs can also be used if authors wish to communicate to readers up-to-date information about how they wish to be addressed or referred to (for example, they wish to include pronouns, additional titles, honorifics, name variations, etc.) alongside their published articles. We encourage authors to make use of the ORCID profile’s “Published Name” field for this purpose. This is entirely optional for authors who wish to communicate such information in connection with their article. Please note that this method is not currently recommended for author name changes: see Cambridge’s author name change policy if you want to change your name on an already published article. See our ORCID FAQs for more information. 

Supplementary materials

Material that is not essential to understanding or supporting a manuscript, but which may nonetheless be relevant or interesting to readers, may be submitted as supplementary material. Supplementary material will be published online alongside your article. Types of supplementary material may include, but are not limited to, appendices, additional tables or figures, datasets, videos, and sound files.

Supplementary materials should be listed after the Financial Support Statement in the article and If the supplementary materials are submitted with the article, please include the following: "The supplementary material for this article can be found at [DOI link]". The link will be added in the production process. If the supplementary materials are deposited in a repository, please link it here. 

Supplementary materials will not be typeset or copyedited, so should be supplied exactly as they are to appear online. Please see our general guidance on supplementary materials for further information.

Data must be available and open to reviewers at the time of submission. We encourage authors to publish data in an appropriate repository along with other relevant materials such as materials, code, or additional analyses. You may also do this in a supplement. In either case, cite these in the manuscript.

Author Hub

You can find guides for many aspects of publishing with Cambridge at Author Hub, our suite of resources for Cambridge authors.