{"id":"W4210647321","doi":"10.2196/preprints.16953","title":"Validity and Usability of a Smartphone Image-Based Dietary Assessment App Compared to 3-Day Food Diaries in Assessing Dietary Intake Among Canadian Adults: Randomized Controlled Trial (Preprint)","year":2019,"lang":"en","type":"preprint","venue":"","topic":"Nutritional Studies and Diet","field":"Medicine","cited_by":1,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Usability; Medicine; System usability scale; Test (biology); Psychology; Gerontology; Computer science; Web usability","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":[0.008209487,0.001887404,0.003224058,0.0007132931,0.002052807,0.001930569,0.00146934,0.003210483,0.007973234],"category_scores_gemma":[0.02104573,0.001172431,0.00547601,0.001129886,0.002131833,0.001504358,0.000902469,0.002592009,0.0006779055],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.006735748,"about_ca_system_score_gemma":0.01367836,"about_ca_topic_candidate":true,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.1208586,"about_ca_topic_score_gemma":0.1385909,"domain_scores_codex":[0.9922553,0.003321777,0.00111358,0.001106381,0.001551402,0.0006514674],"domain_scores_gemma":[0.9907492,0.003032114,0.002465586,0.0005423775,0.002116261,0.001094541],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"randomized_trial","study_design_gemma":"randomized_trial","study_design_scores_codex":[0.9317488,0.01705897,0.006591435,0.004529666,0.005656281,0.00005037973,0.0006989705,0.0001942501,0.001316617,0.0001612906,0.001841249,0.03015204],"study_design_scores_gemma":[0.7604957,0.1801996,0.04529938,0.0009366649,0.008669116,0.00002522605,0.0003924929,0.0009559282,0.00086828,0.0002269031,0.001796103,0.0001346571],"study_design_candidate":"randomized_trial","study_design_consensus":"randomized_trial","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9425555,0.005009405,0.0009957282,0.000825329,0.001226956,0.04329066,0.002475274,0.0001451656,0.003475986],"genre_scores_gemma":[0.9423733,0.002892259,0.006067004,0.001103438,0.0006542483,0.04282634,0.001058375,0.00003642741,0.002988596],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.8791414,"threshold_uncertainty_score":0.2403101,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.03080278491737928,"score_gpt":0.3051865171062469,"score_spread":0.2743837321888677,"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."}}