{"id":"W2321687257","doi":"10.2196/mhealth.5114","title":"Diet and Physical Activity Apps: Perceived Effectiveness by App Users","year":2016,"lang":"en","type":"article","venue":"JMIR mhealth and uhealth","topic":"Mobile Health and mHealth Applications","field":"Health Professions","cited_by":126,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Usability; Physical activity; mHealth; Smartphone app; Norwegian; Healthy eating; Psychology; Mobile apps; Medicine; Gerontology; Psychological intervention; Internet privacy; World Wide Web; Physical therapy; Computer science; Nursing","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":true,"about_ca":false,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":["metaepi_narrow","sts"],"consensus_categories":[],"category_scores_codex":[0.001543573,0.0004428288,0.0008654574,0.0001590218,0.002214423,0.00001487434,0.0001900471,0.0004023542,0.00006527712],"category_scores_gemma":[0.0001664323,0.0003129074,0.00006705062,0.0003251245,0.0003293526,0.0002773671,0.0001460203,0.0009238604,0.0001657269],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0004687854,"about_ca_system_score_gemma":0.001207029,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0008481399,"about_ca_topic_score_gemma":0.0001295753,"domain_scores_codex":[0.9946004,0.001456215,0.0006529681,0.001061449,0.0003650802,0.001863893],"domain_scores_gemma":[0.9939219,0.002407014,0.0004880017,0.0006073744,0.0001522729,0.002423453],"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":[0.005826953,0.001408521,0.1505817,0.02435181,0.00004985044,0.000004701521,0.004782323,3.068483e-7,0.004119738,0.01355265,0.05113984,0.7441816],"study_design_scores_gemma":[0.005319102,0.001130383,0.8536713,0.0006995325,0.00006010383,0.000006807051,0.0005764373,0.0001207797,0.00002863207,0.001429778,0.1364878,0.0004693946],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9803723,0.0009023474,0.0006638015,0.0103725,0.0003451114,0.005705005,0.0003002167,0.0003353861,0.00100337],"genre_scores_gemma":[0.979922,0.007598422,0.0001107206,0.002867876,0.0005265229,0.008264648,0.00003122816,0.00007237654,0.000606215],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.7437121,"threshold_uncertainty_score":0.9999323,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0529191691826831,"score_gpt":0.4495563709794353,"score_spread":0.3966372017967522,"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."}}