نتایج جستجو برای: model bias
تعداد نتایج: 2188354 فیلتر نتایج به سال:
Abstract Introduction: randomized controlled trials are gold standard for investigate treatment effect and important characteristics among the groups is random assignment. In studies, there is no random allocation between the groups hidden bias may be defined results. Methods: We performed sensitivity analysis method was proposed by Mr. Resenbum using R software and programming environment...
many empirical papers have applied a semi-parametric two-stage procedure named tobit model to investigate the sources of inefficiency in different industries over the last two decades. using this approach in small samples has recently been criticized for a possible bias in its results. in very recent papers simar and wilson (2007) have tackled this problem by suggesting an alternative bootstrap...
Despite The Important Role That Management Profit Forecasting Plays In The Decision Making Of Capital Market Actors, These Predictions Appear To Be Biased. In The Attempt To Measure The Bias Of Predicting Profit Management, Numerous One- Dimensional Measurement Tools Have Been Proposed In The Accounting And Finance Literature. Despite These Efforts, No Comprehensive Composite Index Has Been Dev...
Flooding due to the failure of drainage systems is a serious problem for many urban watershed of Iran. This paper shows how flooding in urban drainage systems can be simulated by one- dimensional hydrodynamic modeling incorporating the interaction between (I) the buried pipe systems (II) the streets with open channel flow. The values of the NS, RMSE, and %BIAS statistics were also calculated to a...
b a c k g r o u n d & aim: multi-state models can help better understand the process of chronic diseases such as cancers. these models are influenced by assumptions like individual homogeneity. this study aimed to investigate the effect of lack of individual homogeneity assumption in multi-state models. methods & materials: to investigate the effect of lack of individual homogeneity ass...
Probabilistic approach of traffic assignment has been primarily developed to provide a more realistic and flexible theoretical framework to represent traveler’s route choice behavior in a transportation network. The problem of path overlapping in network modelling has been one of the main issues to be tackled. Due to its flexible covariance structure, probit model can adequately address the pro...
Williams, Watts, Macleod and Mathews' (1988) model of anxiety and depression leads to the prediction that anxious patients will show mood – congreuent implicit memory bias, while depressed patients will show mood-congruent explicit memory bias.Although this prediction has been supported by some researchers (Denny & Hunt, 1992 mathews, Moog, et al , 1989 watkins, et al, 1992), the reliability ...
Objectives: The goal of the present study was to determine the prediction model of social phobia by investigating a number of its predictors. In this study shyness, behavioral inhibition, attentional bias, interpretation bias, social self-efficacy and attachment were assessed as predictors of social phobia. Method: 438 students of Tehran University participated in this study. All participants c...
This paper investigates the impact of referee reliability on the quality and efficiency of peer review. We modeled peer review as a process based on knowledge asymmetries and subject to evaluation bias. We tested various levels of referee reliability and different mechanisms of reviewing effort distribution among agents. We also tested different scientific community structures (cohesive vs. par...
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