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Record W2763825041

Omitting correlated variables

2004· article· es· W2763825041 on OpenAlexaff
Larry Jenkins, Murray Anderson

Bibliographic record

VenueInvestigación operacional · 2004
Typearticle
Languagees
FieldMathematics
TopicStatistical Methods and Applications
Canadian institutionsRoyal Military College of Canada
Fundersnot available
KeywordsHumanitiesPhilosophy
DOInot available

Abstract

fetched live from OpenAlex

Los datos coleccionados del mundo fisico, biologico o producto de la actividad humana usualmente estan altamente correlacionados entre ellos, estableciendose el cuestionamiento de si menos variables pueden contener casi la misma informacion. Una solucion cruda es mirar simplemente a la matriz de correlacion de Pearson y omitir uno de un par de variables altamente correlacionadas. En contraste con esto, nosotros desarrollamos un metodo sistematico de condicionar una o mas variables, y observar la resultante matriz de covarianzas. Si las variables tienen una pequena varianza despues de condicionar, entonces las variables condicionantes contienen la mayor parte de la informacion de todas variables originales. Paralelamente a los usuales tests aplicados en juzgar cuantos componentes principales son suficientes para representar toda la data, usamos la cantidad de varianza explicada por la(s) variable(s) condicionante(s), como una medida de la informacion contenida. El trabajo explica la computacion e incluye ejemplos usando conjuntos de datos publicados. El enfoque esta basado en la alta ganancia respecto al uso de componentes principales, y posee la obvia ventaja respecto a ellos de omitir simplemente algunas de las variables originales a partir de otras consideraciones. El metodo ha sido codificado en Visual-Basic anadido a una hoja de calculo Excel

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

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)0.014
metaresearch head score (Gemma)0.089
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.020
Threshold uncertainty score0.072

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0140.089
Meta-epidemiology (narrow)0.0030.002
Meta-epidemiology (broad)0.0030.003
Bibliometrics0.0030.006
Science and technology studies0.0020.002
Scholarly communication0.0060.008
Open science0.0040.006
Research integrity0.0020.005
Insufficient payload (model declined to judge)0.0200.007

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 head0.062
GPT teacher head0.364
Teacher spread0.302 · 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.

The models applied no category: nothing in the taxonomy fit this work.
Study designTheoretical or conceptual
Domainnot available
GenreMethods

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

Citations0
Published2004
Admission routes1
Has abstractyes

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