{"id":"e574f53a-f563-423a-a28d-fb2d2c683785","arxiv_id":"2502.03709","paper_version":2,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":4.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":0,"one_line_summary":"Users preferred nine-grid layouts that place the highest-rated image in the center and order images by aesthetic quality, but the evidence is a small forced-choice study without significance testing.","lead":"This paper compares four ways of arranging nine photos in a social media grid, ordering them by either aesthetic quality or predicted popularity, and placing the best photo either first or in the center. In a forced-choice study, users preferred center placement and aesthetic-based ordering, but the study lacks statistical tests and a released dataset.","discovery_kind":"new_application","skeptic_critique":{"model":"deepseek-v4-flash","headline":"The headline result is statistically fragile: 628 vs 599 vs 585 raw votes are indistinguishable once clustering and multiple comparisons are considered, and 'center vs sequential' is confounded with which images occupy corners/edges.","rationale":"The reader's concern about NIMA/I2PA calibration is real, but it is not the most load-bearing issue. Even granting the model rankings, Table I cannot carry the conclusion. The counts are clustered (45 participants, 250 image sets, 2250 votes) and no statistical test is reported. A quick Pearson chi-square on the two leading cells gives p≈0.41 (628 vs 599) and p≈0.22 (628 vs 585), and accounting for clustering only weakens the evidence. The significant aggregate differences are driven by the content-sequential cell (438), so the paper's claim that the aesthetic center-prioritization scheme is best is not established. The design also confounds the ordering rule with the position sets: center-prioritization puts ranks 1 through 5 in P5 plus P1, P3, P7, and P9, while sequential puts ranks 1 through 5 in P1 through P5. The formative survey itself shows users favor the center and corners, so the contrast cannot be attributed specifically to center prioritization. A re-analysis of Table I with mixed-effects models and a factorial follow-up would settle whether the headline claim survives. Because the central claim is not supported by the reported evidence, the verdict should move from CONDITIONAL to REJECT, while acknowledging the paper's useful descriptive findings from the formative study.","tokens_in":9294,"tokens_out":8291,"duration_ms":88798,"concrete_test":"Re-analyze the 2250 forced-choice votes with a mixed-effects multinomial model including random intercepts for the 45 participants and the 250 image sets, and report pairwise contrasts among the four schemes with multiplicity correction. If the aesthetic-center vs aesthetic-sequential contrast (628 vs 599) and the aesthetic-center vs content-center contrast (628 vs 585) are not significant after clustering, the claim that aesthetic center prioritization is best is not supported.","verdict_should_be":"REJECT","load_bearing_attack":"The central claim that aesthetic-quality-based center prioritization yielded the best results rests on Table I: 628, 599, 585, and 438 votes out of 2250. A simple two-way test on the two leading cells—628 vs 599—gives p≈0.41; 628 vs 585 gives p≈0.22. The only reliable contrasts are those involving content-sequential (438). Thus the three non-content-sequential schemes are statistically indistinguishable, and the apparent main effects of aesthetic quality and center prioritization are driven almost entirely by one poorly performing cell. Moreover, the 2250 votes are not independent: 45 participants each answered 50 questions about 250 image sets, so participant-level and image-set-level clustering can only inflate the p-values. The design also confounds the ordering principle with position assignment: center prioritization places the top image in P5 and the next four in the corners, whereas sequential places ranks 1 through 5 in P1 through P5. Any preference for the former could be due to corners being favored (as the authors' own formative survey found) rather than to 'center prioritization' per se. Consequently, the data do not establish that the aesthetic center-prioritization scheme is best, nor that center prioritization is the causal driver.","agreement_with_reader":"partial"},"referee_report":{"model":"deepseek-v4-flash","summary":"The paper investigates how the arrangement of nine images in a three-by-three grid affects user preference and perceived popularity of multi-image social media posts. It uses two pretrained models, NIMA for aesthetic quality and I2PA for intrinsic visual popularity, to rank the nine images of each of 250 Weibo posts, and constructs four layout schemes: aesthetic-sequential, aesthetic-center-prioritization, I2PA-sequential, and I2PA-center-prioritization. Participants (N=45) completed forced-choice questionnaires selecting their preferred layout among the four for each image set, yielding 2,250 total votes. The reported vote counts (Table I) are 628, 599, 585, and 438 for aesthetic-center, aesthetic-sequential, I2PA-center, and I2PA-sequential, respectively. The paper concludes that arranging images by aesthetic quality and prioritizing the central position yields the most favorable user evaluations.","tokens_in":9559,"tokens_out":4350,"duration_ms":43658,"significance":"If the central claim were well supported, the paper would offer directly actionable guidance for content creators and social media managers, and it would contribute empirical evidence on whether serial-position effects or central visual attention better predict preference in multi-image grids. The study has notable strengths: it uses real social-media image sets (1,901 crawled posts, 250 selected), derives the layout schemes from two explicit theoretical positions, and collects preference data through a concrete forced-choice method rather than relying solely on model predictions. The use of established pretrained models (NIMA, I2PA) is also a reasonable starting point. However, the statistical basis for the headline result is currently thin, and the experimental design contains a confound that prevents the paper from isolating the effect it claims to establish. The contribution is therefore promising but requires substantial strengthening before the conclusions can be accepted.","major_comments":[{"comment":"The conclusion that the aesthetic center-prioritization scheme 'yielded the best results' is not supported by the reported aggregate counts. The leading vote counts are 628, 599, and 585 out of 2,250; pairwise two-proportion tests give p ≈ 0.41 for 628 vs. 599 and p ≈ 0.22 for 628 vs. 585, and the absence of participant-level or image-set-level clustering corrections makes the effective sample size smaller than 2,250. The paper reports no significance test, confidence interval, or mixed-effects model, so the only robust contrast is that the I2PA-sequential scheme (438) is disfavored; the three other schemes are statistically indistinguishable.","section":"Section V.B, Table I"},{"comment":"The comparison between 'center prioritization' and 'sequential' is confounded with which grid positions receive the top five images. In the center-prioritization scheme the top image occupies P5 and the next four images occupy the four corners, whereas in the sequential scheme ranks 1–5 are placed in P1–P5. The formative study (§III.A) itself reports that corners (P1, P3, P7, P9) are preferred over edge positions, so the relative success of the center-prioritization condition may reflect the corner placement of images 2–5 rather than a specific effect of the central position. An arrangement that varies the two principles independently is needed to disambiguate the cause of the preference.","section":"Section IV.C and V.B"},{"comment":"The NIMA and I2PA models are used to rank thumbnails, but these models were trained on single-image tasks and are applied here to 300×300 crops without any validation of their rank ordering on this material. The entire comparison among the four schemes presupposes that the model scores correctly identify which images are 'best' and 'worst'; if the models mis-rank images, the resulting layouts are effectively arbitrary permutations and the vote counts reflect noise rather than arrangement principles. The paper should provide evidence such as correlation of model scores with human ratings on a sample of the stimuli that the model-based rankings are trustworthy for thumbnail crops.","section":"Section IV.A–IV.B and V.A"},{"comment":"The forced-choice task compares only the four rearranged schemes; the original arrangement of each post is not presented as an option. Because the claimed practical benefit is that the proposed layouts improve on what creators currently do, the absence of the original (or a random) baseline makes it impossible to attribute the observed preferences to improvement over the status quo. The separate pairwise comparison in §III.A (rearranged vs. original) uses a different task and sample, and cannot be imported into the main experiment's conclusions.","section":"Section V.B"}],"minor_comments":[{"comment":"The text refers to 'Figure 2' when describing the pairwise image-pair comparison, but the caption for Figure 3 identifies it as the image-pair questionnaire; cross-references should be corrected.","section":"Section III.A"},{"comment":"The statement 'Scores were ranging from -5 to 5' should be clarified with the exact output range of the I2PA model and any scaling applied before ranking; the original I2PA model does not necessarily produce scores in that range.","section":"Section IV.A.2"},{"comment":"The phrase '1,901 nine-gram charts' should read 'nine-grid layouts' or 'nine-grid posts'; the same terminology issue appears in Section II.B.","section":"Section V.A"},{"comment":"The term 'OGMI' is introduced in Section I but not used later, and Section VI.A describes a 'Generative tool' that is not detailed or evaluated; either provide specifics or place the tool description in clearly labeled future work.","section":"Abstract and Section VI.A"},{"comment":"The phrase 'experiential-centered evaluation' should be 'experience-centered evaluation' or 'user experience evaluation'.","section":"Abstract"},{"comment":"The in-text citation style is inconsistent (e.g., 'Keyan Ding et al [1]' and 'Hossein Taleb [2]'); please unify the formatting to the journal's style.","section":"References"}],"recommendation":"major_revision","confidential_remarks":"The paper addresses a worthwhile applied question and the data collection effort is real, but the central claim rests on a single table of raw vote counts without inferential statistics. The confound between center-prioritization and corner placement, together with the absence of an original-arrangement baseline, means that even a re-analysis of the current data may not fully rescue the current conclusions; the authors may need to run an additional experiment or substantially soften the claims. I would also like to see participant-level data or a data availability statement, since the clustering issue is central to the statistical concern. The paper is not ready for acceptance, but the flaws are fixable within a revision or a short follow-up study."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"Quick take on arXiv:2502.03709.\n\nThe genuinely new thing here is the four-cell comparison: two model-based orderings (NIMA aesthetic scores and I2PA popularity scores) crossed with two spatial principles (sequential reading order and center-prioritized placement), tested by forced choice on the same nine-image sets. That specific comparison does not appear in the prior work they cite, and the data collection is transparent and easy to follow. The formative survey and interviews are honest hypothesis-generation, not rigged evidence: user preferences were collected before the schemes were defined, and the model scores are external, so there is no circular fitting of outcome to predictor.\n\nThe soft spot is the headline result. Table I gives 628, 599, 585, and 438 votes out of 2250. The difference between 628 and 599 is not significant, and 628 vs 585 is weak; the only robust contrast is that content-sequential (438) is worse than the other three. So the abstract's claim that \"layout schemes based on aesthetic quality outperformed others\" is not supported by the data. The apparent aesthetic/center-priority advantage is driven by one low cell.\n\nTwo design issues amplify the problem. First, the 2250 votes are clustered: 45 participants answered 50 questions about 250 image sets, yet there are no significance tests, confidence intervals, or participant/image-set random effects. Second, the ordering principle is confounded with position assignment: center-priority puts the top image in P5 and the next four in the corners; sequential puts ranks 1-5 in P1-P5. Any preference for center-priority could come from the corners being favored, which their own formative survey found. There is also no baseline against the original arrangements, and the NIMA/I2PA models are applied to cropped thumbnails without any validation that their rankings match human rankings in this context.\n\nThat sounds like a takedown, but it is not. The paper is a reasonable pilot study with a clear design, an honest write-up, and practical value for content creators if the effects hold. The problem is the strength of the conclusion, not the research question. If the authors reframe the result as a hypothesis, add mixed-effects modeling or at least proper significance tests, include the original layout as a baseline, and release the stimulus set and vote data, the paper would be genuinely useful.\n\nFor peer review: yes, a serious editor should send it to referees. The topic is timely, the comparison is new, and the methodological gaps are fixable. I would not cite it yet for the central claim, but I would bring it to a reading group as an example of how to design a clean four-way comparison and then over-interpret the top cell.","headline":"Useful four-way comparison of nine-grid arrangements, but the headline preference is statistically fragile and the design confounds ordering with position; worth refereeing as a pilot study.","tokens_in":10067,"tokens_out":2155,"would_cite":false,"duration_ms":22111,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"Putting a post's most aesthetically rated image in the center of a nine-grid wins the most user votes.","keywords":["nine-grid layout","image arrangement","aesthetic quality","image popularity","center prioritization","user preference","social media","forced-choice study"],"falsifier":"Rerun the forced-choice study with layouts whose center image is the one human raters pick as best rather than the NIMA-picked best; if the aesthetic-center scheme then loses its advantage, the reported effect depends on the model's ranking, not on the center-prioritization principle itself.","tokens_in":9142,"feed_emoji":"🖼️","tokens_out":3260,"duration_ms":30618,"temperature":0.7,"pith_summary":"The paper asks whether the order of nine images in a three-by-three grid changes how much people like the post, and which arrangement rule people prefer. It builds four candidate layouts from two single-image scorers (aesthetic quality and intrinsic popularity) and two ordering principles (left-to-right sequential and center-first), then asks 45 participants to pick their favorite layout in 50 forced-choice comparisons each. The aesthetic-quality layout with the best image in the center collected the most votes (628 of 2,250), and the authors conclude that arranging by aesthetic quality and prioritizing the center yields more favorable user evaluations. If that holds, content creators can improve the perceived quality of multi-image posts without changing any image content, just by reordering thumbnails.","feed_headline":"Best image in the center wins nine-grid post votes","feed_subtitle":"A 2,250-vote test finds aesthetic quality plus center priority beats sequential and content-based layouts.","key_machinery":"The central objects are two per-image scoring models and two ordering rules. NIMA scores each thumbnail's aesthetic and technical quality; I2PA scores its intrinsic viral potential. The ordering rules are sequential (reading order from top-left to bottom-right, best first) and center prioritization (best image in the central cell, next four in the corners, rest on edges). Crossing the two scorers with the two rules yields the four nine-grid layouts compared in the forced-choice test.","core_discovery":"The paper claims that, given the same nine images, the arrangement that places the highest-scoring image in the center and distributes the next four by score into the corners, with all ordering decided by per-image aesthetic quality scores (NIMA) rather than predicted viral-popularity scores (I2PA), receives the most favorable user evaluations. In a forced-choice study with 45 participants and 50 trials each (2,250 votes), this aesthetic center-prioritization scheme collected 628 votes, ahead of aesthetic sequential (599), content center (585), and content sequential (438). The authors conclude that arranging images based on aesthetic quality and prioritizing central positions leads to more favorable user evaluations.","pith_inferences":["If the result generalizes, the benefit may transfer to other multi-image grids, such as 3x3 mosaics in stories, profile layouts, or product galleries, and may also hold when the best image is chosen by human raters rather than by NIMA.","The forced-choice test measures immediate preference, not social-media engagement; actual likes, comments, and shares could behave differently, which the paper does not measure.","A direct test of the mechanism would be to let the same crowd rank the nine images themselves and compare layouts built on their own rankings against layouts built on model rankings; if model-built layouts still win, the conclusion is about layout geometry rather than score accuracy."],"forward_implications":["A content creator who puts the highest-quality image in the center and fills the corners with the next four best images can expect more favorable evaluations than a chronological or content-only ordering.","Aesthetic quality, as measured by a single-image model, predicts user preference for grid arrangement better than predicted popularity or virality scores.","The serial-position view (first and last positions matter) is less predictive of user preference than the visual-attention view (center matters) for nine-grid layouts.","An automated arrangement tool can be built on these two scores and two rules, since the rearrangements are computable without human input per post."],"supporting_citations":[{"why":"Supplies the I2PA intrinsic popularity model and the pairwise training dataset used to score thumbnails for the content-based layouts.","marker":"[1]"},{"why":"Supplies the NIMA aesthetic quality model used to score thumbnails for the aesthetic-based layouts.","marker":"[2]"},{"why":"Provides evidence that image positioning and layout affect user engagement with multi-image tweets, motivating the study of layout schemes.","marker":"[3]"},{"why":"Documents that the central position in a nine-grid is treated as most prominent, grounding the center-prioritization ordering principle.","marker":"[4]"},{"why":"Defines the serial-position effect used to justify the sequential ordering arrangement.","marker":"[5]"}],"fun_headline_variants":["Center your best image to boost nine-grid post popularity","Aesthetic quality beats content for nine-grid layout choices","Nine-grid study: center the prettiest image for more votes","For nine-image posts, center-priority aesthetic wins","Grid layout: place best-looking image in center for engagement"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The comparison assumes that NIMA and I2PA scores rank the nine thumbnails the same way a human viewer would, even though both models were trained on single images and are never validated on nine-grid crops.","fun_headline_variants_meta":{"raw":{"variants":["Center your best image to boost nine-grid post popularity","Aesthetic quality beats content for nine-grid layout choices","Nine-grid study: center the prettiest image for more votes","For nine-image posts, center-priority aesthetic wins","Grid layout: place best-looking image in center for engagement"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000265,"raw_usage":{"total_tokens":1567,"prompt_tokens":866,"completion_tokens":701,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":482,"completion_tokens_details":{"reasoning_tokens":622}},"tokens_in":482,"tokens_out":701,"duration_ms":7345,"temperature":1.0,"reasoning_tokens":622,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-09T01:00:29.967358+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Rerun the forced-choice study with layouts whose center image is the one human raters pick as best rather than the NIMA-picked best; if the aesthetic-center scheme then loses its advantage, the reported effect depends on the model's ranking, not on the center-prioritization principle itself.","supporting_citations":[{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Supplies the I2PA intrinsic popularity model and the pairwise training dataset used to score thumbnails for the content-based layouts."},{"cited_title":"Talebi and P","cited_arxiv_id":null,"evidence_quote":"Supplies the NIMA aesthetic quality model used to score thumbnails for the aesthetic-based layouts."},{"cited_title":"Ma and X","cited_arxiv_id":null,"evidence_quote":"Provides evidence that image positioning and layout affect user engagement with multi-image tweets, motivating the study of layout schemes."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Documents that the central position in a nine-grid is treated as most prominent, grounding the center-prioritization ordering principle."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Defines the serial-position effect used to justify the sequential ordering arrangement."}],"review_version":1}