{"id":"9e521d23-84e6-4219-a296-12a67882b93b","arxiv_id":"2607.00854","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":6.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"Field experiment finds symbolic awards on Reddit do not boost user activity or impact and can reduce them when from bots with lottery rationale, but they do encourage direct communication.","lead":"A field experiment on Reddit tested whether symbolic awards from apparent humans or bots, given with different rationales, change user posting volume, impact, or communication. The results indicate limited effects on activity but some increase in direct user-to-user messages, suggesting resilience to simple bot-driven influence.","discovery_kind":"new_application","skeptic_critique":{"model":"grok-4.3","headline":"Causality claim rests on untested assumption that recipients correctly attribute awards to intended rationale and account type rather than platform noise or selection.","rationale":"The reader's weakest_assumption directly identifies the same identification problem; because the review was abstract-only, no stronger internal inconsistency can be diagnosed from the given material. The concern is therefore left exactly where the reader placed it.","tokens_in":1685,"tokens_out":279,"duration_ms":22276,"concrete_test":"Re-analyze the main activity and impact regressions after adding a post-award perception survey (or proxy such as reply content mentioning 'bot') as a moderator; if the lottery-bot reduction disappears or reverses among users who correctly identified the account type, the attribution claim does not hold.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The headline finding (lottery-bot awards reduce activity/impact while other awards do not) requires that (a) users perceive the giver as bot vs. human exactly as designed and (b) the observed delta is caused by the rationale text rather than any correlated platform event, user self-selection into award receipt, or unobserved heterogeneity. The abstract provides no evidence that either condition was validated (no manipulation check, no randomization diagnostics, no placebo or timing controls). If either fails, the differential effect cannot be attributed to the experimental factor.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The manuscript reports a field experiment on Reddit in which accounts presented as humans or bots delivered symbolic awards to users accompanied by one of four rationales (praising logical argument, emotional sensitivity, moral integrity, or a random lottery draw). The authors track recipients' subsequent posting volume, downstream impact (e.g., upvotes, comments received), content characteristics, and direct communication with other users. They report that awards do not increase activity or impact overall, that lottery awards from bot accounts can reduce these metrics, and that awards of any type increase direct user-to-user communication. The authors interpret the results as evidence of user resilience to simple behavioral stimuli from artificial agents while underscoring the importance of transparent bot labeling.","tokens_in":1790,"tokens_out":629,"duration_ms":34848,"significance":"If the causal attribution holds, the study supplies rare field-experimental evidence on the boundary conditions of social influence and behavioral contagion in large online platforms. It directly informs debates on platform governance and AI ethics by showing that low-effort award mechanisms may fail to produce the feared manipulation effects, while also documenting a positive spillover into interpersonal communication. The design's use of real platform users and observable behavioral outcomes strengthens external validity relative to lab or survey studies.","major_comments":[{"comment":"§3 (Experimental Design) and §4.1 (Manipulation and Randomization): The headline differential effect—that lottery-bot awards reduce activity and impact while other conditions do not—requires that recipients correctly perceived the account type (bot vs. human) and attributed the award to the stated rationale rather than platform noise or self-selection. No manipulation check, post-award survey, or validation of perceived account type is reported. Without this, the observed deltas cannot be unambiguously attributed to the experimental factors.","section":"§3, §4.1"},{"comment":"§4.2 (Outcome Measurement) and Table 2: The claim that awards 'encourage direct communication' is presented as a robust secondary finding, yet the manuscript does not report whether this increase survives correction for multiple comparisons across the four rationales and two account types, nor whether it is driven by a small number of high-activity users. If the communication effect is the only positive result, its statistical robustness is load-bearing for the overall interpretation.","section":"§4.2, Table 2"}],"minor_comments":[{"comment":"The abstract states that 'awards from bots with the lottery rationale can in fact reduce them,' but the corresponding results section should explicitly state the effect size, confidence interval, and sample size for this comparison to allow readers to judge practical significance.","section":"Abstract, §4.3"},{"comment":"Figure 1 (or equivalent timeline figure) would benefit from clearer labeling of the pre- and post-award windows and any platform-wide events that occurred during data collection.","section":"Figure 1"}],"recommendation":"major_revision","confidential_remarks":null},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for these constructive comments on causal attribution and statistical robustness. We address each point below.","responses":[{"response":"We acknowledge this as a genuine limitation for unambiguous causal attribution. Conducting post-experiment surveys on Reddit would have violated platform terms regarding unsolicited user contact and risked contaminating the naturalistic setting. Account profiles were constructed with explicit bot indicators visible to recipients, and randomization was used to balance conditions. We will add an explicit limitations subsection discussing the lack of direct perception validation and its implications for interpreting the bot-lottery condition.","revision_made":"partial","referee_comment":"[§3, §4.1] §3 (Experimental Design) and §4.1 (Manipulation and Randomization): The headline differential effect—that lottery-bot awards reduce activity and impact while other conditions do not—requires that recipients correctly perceived the account type (bot vs. human) and attributed the award to the stated rationale rather than platform noise or self-selection. No manipulation check, post-award survey, or validation of perceived account type is reported. Without this, the observed deltas cannot be unambiguously attributed to the experimental factors."},{"response":"We agree that these robustness checks are necessary. In revision we will apply Bonferroni (or FDR) correction to the communication-effect tests across the eight conditions and add sensitivity analyses that drop the top 1% and 5% most active users. Updated results and tables will be included in the main text or supplementary materials.","revision_made":"yes","referee_comment":"[§4.2, Table 2] §4.2 (Outcome Measurement) and Table 2: The claim that awards 'encourage direct communication' is presented as a robust secondary finding, yet the manuscript does not report whether this increase survives correction for multiple comparisons across the four rationales and two account types, nor whether it is driven by a small number of high-activity users. If the communication effect is the only positive result, its statistical robustness is load-bearing for the overall interpretation."}],"tokens_in":1471,"tokens_out":443,"duration_ms":31812,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"The paper runs a field experiment on Reddit where accounts that look human or bot give awards under four rationales—logical, emotional, moral, or lottery—and then tracks changes in the recipients' posting volume, impact, and communication, plus any spread to others. The main reported result is that awards overall do not raise activity or downstream impact, the lottery-bot version can lower them, yet all versions raise direct user-to-user messages.\n\nWhat stands out is the scale of the live-platform test and the clean separation of account type from rationale text. Few studies get this kind of access to measure both immediate and contagious effects at once.\n\nThe soft spot is the causal link. The headline contrast between lottery-bot awards and the rest requires that recipients actually registered the account as bot or human and read the rationale as written. Nothing in the available description shows a manipulation check, randomization balance table, or timing control that would rule out platform noise or selection. If those perceptions did not land as planned, the differential drop cannot be pinned on the rationale.\n\nThe work is aimed at researchers who study platform governance and AI agents in online communities. Anyone running similar experiments would find the setup useful to examine, even if the current evidence is preliminary. It is worth sending to referees because field experiments on this scale are uncommon and the topic matters for policy, though the perception step will need direct evidence before the claims can be taken as settled.","headline":"The experiment shows lottery-bot awards reducing activity while other awards do not and all awards increasing direct messages, but the design leaves the perception and attribution assumptions untested.","tokens_in":2250,"tokens_out":365,"would_cite":false,"duration_ms":33256,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"Awards on Reddit do not boost user activity or impact and can reduce both when issued randomly by bots.","keywords":["social influence","behavioral contagion","field experiment","bots","Reddit","awards","online communities","user activity"],"falsifier":"A replication experiment in which bot-issued lottery awards produce no reduction in recipient activity or impact would falsify the reported negative effect.","tokens_in":2603,"feed_emoji":"🤖","tokens_out":664,"duration_ms":45921,"temperature":0.7,"pith_summary":"The paper describes a field experiment that sent symbolic awards to Reddit users from accounts that appeared either human or bot. Each award came with one of four explanations: praise for logical argument, emotional sensitivity, moral integrity, or a random lottery draw. The study tracked how these awards changed the recipients' posting volume, impact, content, and interactions with others. Results showed no rise in activity or influence from any awards, with random bot awards linked to lower activity, yet all awards increased direct replies between users. This pattern suggests online users may resist basic reward signals from artificial agents while remaining open to prompts that encourage conversation.","feed_headline":"Bot lottery awards cut Reddit user activity while human ones do not boost it","feed_subtitle":"Field test finds symbolic rewards fail to raise posting or impact but do increase direct replies between users.","key_machinery":"The field experiment that assigns award givers (apparent human or bot) and rationales (logic, emotion, moral, or lottery) to measure subsequent changes in recipient behavior volume, impact, and communication.","core_discovery":"In the field experiment, apparent human and bot accounts issued awards with rationales praising logical argument, emotional sensitivity, moral integrity, or a random lottery. These awards produced no increase in recipients' activity levels or downstream impact on the platform. Awards from bots justified by lottery in fact lowered activity and impact. Across conditions, however, the awards increased direct communication between users. The findings point to resilience against simple behavioral stimuli from artificial agents but underscore the importance of transparent bot labeling for platform governance.","pith_inferences":["If the pattern holds, platforms that use bot-driven reward systems for engagement may achieve little or no net gain and risk net losses in some cases.","Testing the same award design on other platforms could reveal whether the observed resilience is specific to Reddit's culture or more general.","More advanced AI interactions that sustain conversation rather than deliver one-time awards might overcome the resistance seen here."],"forward_implications":["Simple positive awards from bots or humans do not increase user activity or platform impact on Reddit.","Awards justified as random lottery draws from bots can decrease user activity and impact.","Awards of any type increase direct communication and replies between users.","Users appear more resilient to basic reward manipulation than to schemes that simulate ongoing human conversation.","Transparent labeling of automated agents supports ethical platform governance."],"fun_headline_variants":["Bot lottery awards cut Reddit activity","Human awards do not boost Reddit posts","Awards raise direct user replies on Reddit","Bot lottery rationale lowers Reddit impact","Awards fail to increase user activity levels on Reddit"],"cache_read_input_tokens":64,"weakest_assumption_plain":"Recipients must interpret the accounts and award rationales exactly as the experiment intended, with any behavior shifts caused by the awards rather than other platform factors.","fun_headline_variants_meta":{"raw":{"variants":["Bot lottery awards cut Reddit activity","Human awards do not boost Reddit posts","Awards raise direct user replies on Reddit","Bot lottery rationale lowers Reddit impact","Awards fail to increase user activity levels on Reddit"]},"model":"grok-4.3","cost_usd":0.005237,"raw_usage":{"total_tokens":2454,"prompt_tokens":665,"num_sources_used":0,"completion_tokens":51,"cost_in_usd_ticks":52365500,"prompt_tokens_details":{"text_tokens":665,"audio_tokens":0,"image_tokens":0,"cached_tokens":64},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":1738,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":665,"tokens_out":51,"duration_ms":27079,"temperature":1.0,"reasoning_tokens":1738,"cache_read_input_tokens":64,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-07-02T03:05:41.358011+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"A replication experiment in which bot-issued lottery awards produce no reduction in recipient activity or impact would falsify the reported negative effect.","supporting_citations":[],"review_version":1}