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Record W2883411829 · doi:10.2196/10527

Accuracy of Fitbit Devices: Systematic Review and Narrative Syntheses of Quantitative Data

2018· review· en· W2883411829 on OpenAlexafffundvenue
Lynne M. Feehan, Jasmina Geldman, Eric C. Sayre, Chance Park, Allison M. Ezzat, Ju Young Yoo, Clayon B. Hamilton, Linda Li

Bibliographic record

VenueJMIR mhealth and uhealth · 2018
Typereview
Languageen
FieldMedicine
TopicPhysical Activity and Health
Canadian institutionsBC Children's HospitalResearch CanadaUniversity of British Columbia
FundersCanadian Institutes of Health ResearchSimon Fraser University
KeywordsActivity trackerCINAHLApplied psychologySocial desirability biasHealth careMEDLINEActigraphyPhysical activityPsychologyComputer scienceMedicinePhysical therapyPsychological interventionSocial psychologyNursing

Abstract

fetched live from OpenAlex

OpenAlex records an abstract for this work, but it could not be fetched just now.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.078
metaresearch head score (Gemma)0.404
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesMetaresearch
Consensus categoriesnone
DomainCandidate signal: Methods · Consensus signal: none
Study designCandidate signal: Systematic review · Consensus signal: Systematic review
GenreCandidate signal: Review · Consensus signal: Review
Teacher disagreement score0.922
Threshold uncertainty score0.413

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0780.404
Meta-epidemiology (narrow)0.0020.002
Meta-epidemiology (broad)0.0090.008
Bibliometrics0.0270.027
Science and technology studies0.0010.003
Scholarly communication0.0060.008
Open science0.0030.004
Research integrity0.0020.002
Insufficient payload (model declined to judge)0.0070.001

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.385
GPT teacher head0.535
Teacher spread0.150 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

Study designSystematic review
DomainMethods
GenreReview

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations665
Published2018
Admission routes3
Has abstractyes

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