Peer Review History
| Original SubmissionFebruary 6, 2026 |
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Dear Dr. Samii, Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process. Please submit your revised manuscript by Jun 28 2026 11:59PM. If you will need more time than this to complete your revisions, please reply to this message or contact the journal office at plosone@plos.org. When you're ready to submit your revision, log on to https://www.editorialmanager.com/pone/ and select the 'Submissions Needing Revision' folder to locate your manuscript file.
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Please note that your Data Availability Statement is currently missing the repository name and the DOI/accession number of each dataset or a direct link to access each database. If your manuscript is accepted for publication, you will be asked to provide these details on a very short timeline. We therefore suggest that you provide this information now, though we will not hold up the peer review process if you are unable. 3. Please amend either the abstract on the online submission form (via Edit Submission) or the abstract in the manuscript so that they are identical. 4. If the reviewer comments include a recommendation to cite specific previously published works, please review and evaluate these publications to determine whether they are relevant and should be cited. There is no requirement to cite these works unless the editor has indicated otherwise. [Note: HTML markup is below. Please do not edit.] Reviewers' comments: Reviewer's Responses to Questions Comments to the Author 1. Is the manuscript technically sound, and do the data support the conclusions? Reviewer #1: Partly Reviewer #2: Partly Reviewer #3: Partly Reviewer #4: Partly ********** 2. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #2: No Reviewer #3: Yes Reviewer #4: No ********** 3. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: Yes Reviewer #4: Yes ********** 4. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #2: Yes Reviewer #3: Yes Reviewer #4: Yes ********** Reviewer #1: 1. The authors are suggested to highlight in Abstract the novelty of the study and the main finding, especially the moderating role of avoidant attachment. 2. In Introduction Section, it is suggested to streamline the introduction to attachment theory, focusing specifically on its regulatory mechanisms concerning sleep and loneliness. 3. In Results Section, it is suggested to emphasize the magnitude of effect sizes and avoid overinterpreting statistical significance alone. 4. In Discussion Section, it is suggested to provide theoretical explanations for nonsignificant results and discuss the impact of sample bias on the findings. 5. Please ensure all tables are correctly cited within the text and include appropriate titles and notes. Reviewer #2: This manuscript presents a secondary analysis of a large dataset and aimed at examining the moderating role of attachment style on the association between loneliness and sleep quality. The topic is relevant and underexplored, and the large sample size provides strong statistical power supporting its potential for publication. However, several methodological and reporting issues should be addressed to strengthen the rigor and interpretation of the findings. 1- The manuscript does not report reliability indices (e.g., Cronbach’s alpha) for the scales used in the present sample. Even when validated instruments are employed, it is standard practice to report internal consistency within the study population to ensure reliability of the used scales, as psychometric properties may vary across samples. This is crucial is interpreting the results obtained in the analysis. If reliability isn’t supported, the robustness of the results is affected and this should be clearly mentioned and cautiously interpreted. Recommendation: Please report Cronbach’s alpha (or other appropriate reliability measures) for all scales included in the analysis. 2- All key variables (loneliness, attachment style, and sleep quality) were assessed using self-report instruments. While this is common in large epidemiological studies, it introduces potential biases related to self-reporting, including recall bias and social desirability bias. This is particularly all the more relevant for sleep-related variables, as accurate recall of parameters such as sleep latency or nighttime awakenings may be limited. Recommendation: The limitations section would benefit from mentioning this point. 3- The authors appropriately acknowledge the limited number of variables available due to the secondary nature of the dataset. However, the absence of key potential confounders remains an important limitation. While this constraint cannot be resolved, its implications should be more explicitly integrated into the interpretation of the findings, particularly regarding the strength and generalizability of the observed moderation effect (even withing the healthy UK population and despite the big sample size) Recommendation: Emphasize the role of residual confounding more clearly in the discussion highlighting the literature studying potential missing confounders. Reviewer #3: I appreciate the opportunity to review the work "Adult Attachment, Loneliness, and the Effects on Sleep Quality" which reports a secondary analysis of data from the Touch Test study (BBC/Wellcome Collection, 2020) to examine how the dimensions of adult attachment (anxiety and avoidance) and loneliness are associated and interact to influence sleep outcomes (duration, quality, onset latency and time of wakefulness after nighttime awakening). The abstract adequately describes the study. However, the abstract on the cover page and the abstract in the body of the manuscript report different results. The former mentions a significant effect of the interaction between anxious attachment and loneliness on sleep quality; the latter does not report such an effect. The abstract in the body of the manuscript omits the significant main effects of both attachment and loneliness on all four sleep outcomes, which are consistent and robust findings of the study. The introduction provides a well-constructed conceptual framework that contextualizes the clinical and social relevance of sleep, loneliness, and adult attachment as interrelated factors. The interaction between these variables has not been directly examined in previous studies, making this research compelling and original. However, the controversy over whether avoidant attachment protects or amplifies the loneliness stress response —central to the moderation hypothesis— is not developed in sufficient depth. The objective is clear, although the overall objective could be stated more precisely by explicitly mentioning the hypothesized moderating role of the attachment dimensions. Materials and Methods There is inconsistency in the reported N (15,045 in the abstract, 15,049 in the text, ~11,970 in the models). A participant flowchart explaining the exclusions is suggested. The exact procedure for centering variables and creating interaction terms is mentioned but not detailed. It is not reported whether the proportionality of odds assumption (parallel lines test) required by ordinal logistic regression was verified. The description of the ECR-12 scoring method is ambiguous (attachment scores were calculated as 'summed scores where means were calculated and then multiplied by the number of items in each scale'). The 4-item UCLA-LS version lacks the correct citation; this version, Russell et al. (1980), corresponds to the original 20-item scale. The sleep items adapted from the PSQI lack psychometric support in the sample. Instead, the items adapted by Dueren et al. were used. (2022), without reporting evidence of validity or reliability. The a priori power analysis is a notable strength of the manuscript, especially the use of InteractionPowerR() to estimate the N needed to detect small interaction effects. However, the result of the proportionality of odds test should be reported to validate the ordinal model, and the pseudo-R² values should be discussed as a complement to the ORs. The results are presented in an orderly fashion. However, the odds ratios (ORs) for all significant effects are extremely close to 1.0, indicating practically trivial effect sizes. This situation—common with very large sample sizes—requires an explicit discussion distinguishing between statistical significance and practical relevance. Table 4 contains a typographical error in the confidence interval (CI) for the OR for Loneliness × Anxious Attachment, which should be corrected. The simple slope analysis (Table 5) is appropriate and supports the interpretation of moderation. However, the authors should also report whether the difference between the slopes at high and low levels of avoidance is statistically significant (test of difference of slopes). The inclusion of 'participation end date' as a covariate is methodologically justified given that data collection took place during the COVID-19 pandemic. However, the authors note that this variable correlates with both dimensions of attachment and with three of the four sleep outcomes, suggesting that the collection period (pre-pandemic vs. pandemic) is a significant confounder. The dichotomous variable pre/during COVID-19 would have been more interpretable than a continuous date, and its moderating effect on the results warrants further discussion than is currently offered. In Table 4 (Wake-After-Sleep Onset predictors), the OR for Loneliness×Anxious Attachment reports '[.666-1.000-.998]' which is clearly a typographical or formatting error. The authors conclude that the results do not support H2 for moderation of the anxiety dimension. However, the discussion does not delve deeply enough into why this moderation was not significant or under what conditions it might be expected. The explanation offered (that anxious individuals might have greater motivation to overcome loneliness as a buffer) is speculative and not directly cited. The final conclusion states that 'avoidant attachment orientation may moderate the relationship between loneliness and sleep quality'. However, the only outcome in which significant moderation was found was sleep duration, not sleep quality (Table 2: OR=.999, p=.329). The results of the simple slope analysis (Table 5) indicate that the relationship between loneliness and sleep duration is significant only at high levels of avoidant attachment, but the direction is not sufficiently clear in the text. It is stated that 'higher values of loneliness and avoidant attachment indicate shorter sleep duration' (Figure 1 legend), but in Table 1 the OR for Avoidant Attachment = 0.985 (B = -.015) also indicates shorter duration with higher avoidance, even as a main effect. Aanes et al. (2009) appears correctly in the reference list but in the text it is cited as Aanes et al. (2012) Reviewer #4: This manuscript addresses an interesting and potentially important question: whether attachment dimensions and loneliness jointly relate to sleep outcomes in a large secondary dataset. The topic is appropriate for PLOS ONE, and the sample size is a strength. However, in its current form, the paper has several serious problems of internal consistency, model specification, reporting accuracy, and interpretation that prevent a full assessment of methodological rigor. The most important issue is that the manuscript’s central claim is not reported consistently across the title-page abstract, main abstract, results, discussion, conclusion, and tables. In addition, the analytic approach to sleep duration and the handling of multiple tests require substantial revision. The paper’s strongest features are the large dataset, use of established constructs, and an attempt to examine interaction effects rather than only main effects. However, I do not think the manuscript is ready for publication without major reanalysis and substantial rewriting. The key issues are: 1. Internal inconsistency of the main finding 2. Questionable modeling of sleep duration as an ordinal monotonic outcome 3. No clear control for multiplicity despite many tests 4. Insufficient reporting of missing data, analytic sample derivation, and model diagnostics 5. Methods and results do not fully match 6. Discussion and conclusion overstate the evidence I think the question is publishable in principle, but the current manuscript needs major revision before it can be judged methodologically sound. The authors need to correct internal contradictions, clarify the preregistration and model specification, justify or reanalyze the sleep duration outcome, address multiplicity, and rewrite the discussion and conclusion so they match the actual findings. ********** what does this mean?). If published, this will include your full peer review and any attached files. If you choose “no”, your identity will remain anonymous but your review may still be made public. Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy Reviewer #1: No Reviewer #2: No Reviewer #3: Yes: Francisco Paz Rodríguez Reviewer #4: Yes: Mieska Despitasari ********** [NOTE: If reviewer comments were submitted as an attachment file, they will be attached to this email and accessible via the submission site. Please log into your account, locate the manuscript record, and check for the action link "View Attachments". If this link does not appear, there are no attachment files.] To ensure your figures meet our technical requirements, please review our figure guidelines: https://journals.plos.org/plosone/s/figures You may also use PLOS’s free figure tool, NAAS, to help you prepare publication quality figures: https://journals.plos.org/plosone/s/figures#loc-tools-for-figure-preparation. NAAS will assess whether your figures meet our technical requirements by comparing each figure against our figure specifications.
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| Revision 1 |
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Adult attachment, loneliness, and self-reported sleep outcomes: A secondary analysis of the Touch Test Study PONE-D-26-05119R1 Dear Dr. Samii, We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements. Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication. An invoice will be generated when your article is formally accepted. Please note, if your institution has a publishing partnership with PLOS and your article meets the relevant criteria, all or part of your publication costs will be covered. Please make sure your user information is up-to-date by logging into Editorial Manager at Editorial Manager® and clicking the ‘Update My Information' link at the top of the page. For questions related to billing, please contact billing support. If your institution or institutions have a press office, please notify them about your upcoming paper to help maximize its impact. If they’ll be preparing press materials, please inform our press team as soon as possible -- no later than 48 hours after receiving the formal acceptance. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org. Kind regards, Runtang Meng, PhD Academic Editor PLOS One Additional Editor Comments (optional): Reviewers' comments: Reviewer's Responses to Questions Comments to the Author Reviewer #1: All comments have been addressed Reviewer #3: All comments have been addressed ********** 2. Is the manuscript technically sound, and do the data support the conclusions??> Reviewer #1: Yes Reviewer #3: Yes ********** 3. Has the statistical analysis been performed appropriately and rigorously? -->?> Reviewer #1: Yes Reviewer #3: Yes ********** 4. Have the authors made all data underlying the findings in their manuscript fully available??> The PLOS Data policy Reviewer #1: Yes Reviewer #3: Yes ********** 5. Is the manuscript presented in an intelligible fashion and written in standard English??> Reviewer #1: Yes Reviewer #3: Yes ********** Reviewer #1: (No Response) Reviewer #3: The authors have carefully addressed the comments made. The provided version of the manuscript, which reflects the changes from the previous version, is publishable as it meets the journal's rigorous standards. ********** what does this mean?). If published, this will include your full peer review and any attached files. If you choose “no”, your identity will remain anonymous but your review may still be made public. Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy Reviewer #1: No Reviewer #3: Yes: Francisco Paz Rodríguez ********** |
| Formally Accepted |
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PONE-D-26-05119R1 PLOS One Dear Dr. Samii, I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS One. Congratulations! Your manuscript is now being handed over to our production team. At this stage, our production department will prepare your paper for publication. This includes ensuring the following: * All references, tables, and figures are properly cited * All relevant supporting information is included in the manuscript submission, * There are no issues that prevent the paper from being properly typeset You will receive further instructions from the production team, including instructions on how to review your proof when it is ready. Please keep in mind that we are working through a large volume of accepted articles, so please give us a few days to review your paper and let you know the next and final steps. Lastly, if your institution or institutions have a press office, please let them know about your upcoming paper now to help maximize its impact. If they'll be preparing press materials, please inform our press team within the next 48 hours. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org. You will receive an invoice from PLOS for your publication fee after your manuscript has reached the completed accept phase. If you receive an email requesting payment before acceptance or for any other service, this may be a phishing scheme. Learn how to identify phishing emails and protect your accounts at https://explore.plos.org/phishing. If we can help with anything else, please email us at customercare@plos.org. Thank you for submitting your work to PLOS One and supporting open access. Kind regards, PLOS One Editorial Office Staff on behalf of Dr. Runtang Meng Academic Editor PLOS One |
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