{"id":"W1490777402","doi":"10.5220/0004533904270434","title":"The Usability of CAPTCHAs on Smartphones","year":2013,"lang":"en","type":"article","venue":"","topic":"User Authentication and Security Systems","field":"Computer Science","cited_by":24,"is_retracted":false,"has_abstract":true,"ca_institutions":"Carleton University","funders":"","keywords":"CAPTCHA; Usability; Computer science; Heuristic evaluation; Turing test; Human–computer interaction; Zoom; World Wide Web; Artificial intelligence; Engineering","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.004255106,0.0009175766,0.0005143071,0.001035678,0.000657496,0.00140156,0.0009354478,0.0009004287,0.002704937],"category_scores_gemma":[0.04620461,0.0003626775,0.0003203969,0.0005799626,0.0006176755,0.001593834,0.0009719242,0.0005303065,0.0009032824],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0005736888,"about_ca_system_score_gemma":0.0002921757,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.001698669,"about_ca_topic_score_gemma":0.00193489,"domain_scores_codex":[0.9945335,0.002874189,0.0005247657,0.0004174745,0.001345321,0.0003047841],"domain_scores_gemma":[0.9358047,0.04419299,0.002496287,0.007911401,0.008728758,0.0008658583],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"design_other","study_design_gemma":"observational","study_design_scores_codex":[0.006756659,0.001304719,0.06918602,0.007360911,0.0003709417,0.004369097,0.02828399,0.007448105,0.1960895,0.002236751,0.02526194,0.6513314],"study_design_scores_gemma":[0.0006881505,0.0300778,0.3746113,0.003395739,0.001155791,0.01605116,0.03184337,0.1294073,0.3053384,0.003826717,0.1026274,0.0009770161],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9650697,0.0006250637,0.022047,0.0003736874,0.00008486612,0.000965773,0.000460846,0.00310074,0.007272372],"genre_scores_gemma":[0.9789823,0.0002056404,0.01892385,0.0001451744,0.00002200666,0.0002614149,0.0002486406,0.0001633917,0.001047487],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.004255106,"threshold_uncertainty_score":0.02250338,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01304949582669456,"score_gpt":0.2223322284844969,"score_spread":0.2092827326578023,"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."}}