Results 11 to 20 of about 2,780,395 (295)

Statistical Sources of Variable Selection Bias in Classification Tree Algorithms Based on the Gini Index [PDF]

open access: yes, 2005
Evidence for variable selection bias in classification tree algorithms based on the Gini Index is reviewed from the literature and embedded into a broader explanatory scheme: Variable selection bias in classification tree algorithms based on the Gini ...
Strobl, Carolin
core   +2 more sources

Examination of early treatment effects and related biases during the conduct of two UK-wide pragmatic orthopaedic surgical trials: ProFHER and UK FROST

open access: yesBone & Joint Open, 2023
Aims: Early large treatment effects can arise in small studies, which lessen as more data accumulate. This study aimed to retrospectively examine whether early treatment effects occurred for two multicentre orthopaedic randomized controlled trials (RCTs)
Catherine N. Knowlson   +4 more
doaj   +1 more source

Variable Selection Bias in Classification Trees Based on Imprecise Probabilities [PDF]

open access: yes, 2005
Classification trees based on imprecise probabilities provide an advancement of classical classification trees. The Gini Index is the default splitting criterion in classical classification trees, while in classification trees based on imprecise ...
Strobl, Carolin
core   +3 more sources

Natural selection. III. Selection versus transmission and the levels of selection [PDF]

open access: yes, 2011
George Williams defined an evolutionary unit as hereditary information for which the selection bias between competing units dominates the informational decay caused by imperfect transmission.
Frank, Steven A.
core   +2 more sources

Who needs selection bias?

open access: yesScandinavian Journal of Work, Environment & Health, 2014
Present day low participation rates in certain parts of research is concerning. It is not unusual that half (or even more) of those invited to participate in a research project decline the invitation.
Jørn Olsen
doaj   +1 more source

Scientific Research or Advocacy? Emotive Labels and Selection Bias Confound Survey Results

open access: yesEcology and Society, 2000
Robert Costanza presents four compelling visions of the future, but the language he uses to describe them is emotive and value-laden and may bias the survey results.
Jerome K. Vanclay
doaj   +1 more source

Approaches to canine health surveillance [PDF]

open access: yes, 2014
Effective canine health surveillance systems can be used to monitor disease in the general population, prioritise disorders for strategic control and focus clinical research, and to evaluate the success of these measures.
Brodbelt, D C   +5 more
core   +2 more sources

Appreciating Factors Beyond the Physical in Talent Identification and Development: Insights From the FC Barcelona Sporting Model

open access: yesFrontiers in Sports and Active Living, 2020
FC Barcelona is a multi-sport organization that adopts a talent identification approach that emphasizes the technical, psychological, and perceptual–cognitive attributes. It is unclear within this type of sporting selection model whether the relative age
Greg Doncaster   +4 more
doaj   +1 more source

Limitations of econometric evaluation of nonrandomized residential energy efficiency programs: A case study of Northern California rebate programs

open access: yesEnvironmental Data Science, 2022
Residential energy efficiency programs play an important role in combating climate change. More precise quantification of the magnitude and timing of energy savings would bring large system benefits, allowing closer integration of energy efficiency into ...
Evan D. Sherwin   +2 more
doaj   +1 more source

Accounting for biases in survey-based estimates of population attributable fractions

open access: yesPopulation Health Metrics, 2019
Background This paper discusses best practices for estimating fractions of mortality attributable to health exposures in survey data that are biased by observed confounders and unobserved endogenous selection.
Ryan Masters, Eric Reither
doaj   +1 more source

Home - About - Disclaimer - Privacy