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Should We Focus More on Individual Differences or on Job Attitudes for Increased Job Performance? Four Decades of Research and a Monte Carlo Simulation

Dragoş Iliescu et al.

Journal of Business and Psychology2026https://doi.org/10.1007/s10869-026-10114-2article
AJG 3ABDC A
Weight
0.50

Abstract

This study examines how stable individual differences and malleable job attitudes differentially translate into job performance, with a focus on quantifying relative efficiency contrasts under equalized assumptions. On one hand, we consider performance gains that follow from increasing levels of stable individual differences; on the other, we consider illustrative utility implications derived from job attitude associations. Based on an input matrix extracted from meta-analyses we conduct a Monte Carlo simulation for three alternative models linking individual differences and job attitudes to task and contextual job performance. We hereby untangle unique and shared validities while avoiding a substitutive “either/or” framing, and clarify where marginal performance leverage tends to reside per standardized unit increase in each class of predictors.

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https://doi.org/https://doi.org/10.1007/s10869-026-10114-2

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@article{dragoş2026,
  title        = {{Should We Focus More on Individual Differences or on Job Attitudes for Increased Job Performance? Four Decades of Research and a Monte Carlo Simulation}},
  author       = {Dragoş Iliescu et al.},
  journal      = {Journal of Business and Psychology},
  year         = {2026},
  doi          = {https://doi.org/https://doi.org/10.1007/s10869-026-10114-2},
}

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Should We Focus More on Individual Differences or on Job Attitudes for Increased Job Performance? Four Decades of Research and a Monte Carlo Simulation

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Evidence weight

0.50

Balanced mode · F 0.40 / M 0.15 / V 0.05 / R 0.40

F · citation impact0.50 × 0.4 = 0.20
M · momentum0.50 × 0.15 = 0.07
V · venue signal0.50 × 0.05 = 0.03
R · text relevance †0.50 × 0.4 = 0.20

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