{"id":"W4408167082","doi":"10.31219/osf.io/jwz3e_v1","title":"Evaluating the Partisan Media Echo Chamber Hypothesis in Canada","year":2025,"lang":"en","type":"preprint","venue":"","topic":"Social Media and Politics","field":"Social Sciences","cited_by":0,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Echo (communications protocol); Political science; Psychology; Computer science; Computer security","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.005478441,0.0004554006,0.00071503,0.002053124,0.008391866,0.003676812,0.001843822,0.0007470919,0.008461478],"category_scores_gemma":[0.02311233,0.0003693374,0.0006032774,0.004329131,0.003018044,0.001146696,0.002009141,0.001266393,0.0004561376],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.06603628,"about_ca_system_score_gemma":0.06220206,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.9972522,"about_ca_topic_score_gemma":0.9971445,"domain_scores_codex":[0.9960459,0.0006528316,0.00009583465,0.0006112615,0.001112222,0.001481932],"domain_scores_gemma":[0.9765615,0.005734572,0.002669484,0.001121643,0.01083836,0.003074358],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.001124739,0.0002871854,0.9261265,0.0001455204,0.0003028256,0.0004074577,0.007219427,0.001906177,0.0007280763,0.01918026,0.01864251,0.02392919],"study_design_scores_gemma":[0.0001342602,0.0001021681,0.9500924,0.0000825615,0.0002434828,0.00004973692,0.02139583,0.009419526,0.0007914019,0.001844388,0.01575413,0.0000900932],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9686642,0.0005559321,0.0005522817,0.002504964,0.00005339791,0.0001282072,0.002840307,0.00002563123,0.024675],"genre_scores_gemma":[0.9953028,0.0001604089,0.0002782271,0.0002550253,0.00001400742,0.00002349029,0.001047268,0.00001493027,0.002903823],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.06603628,"threshold_uncertainty_score":0.479129,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.1600960383037794,"score_gpt":0.4040301972911318,"score_spread":0.2439341589873524,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}