The complex effects of job complexity: A meta-analysis of job complexity and employee outcomes.

= 121 effect sizes), analysis confirmed job resource-complexity to be positively associated with task performance, learning, and well-being and negatively associated with job strain, whereas job challenge-complexity was positively associated with task performance, learning, well-being, and job strain. A lack of data precluded analysis of job hindrance-complexity. Our study advances theoretical understanding of job complexity, provides the first empirical synthesis of different types of job complexity and employee outcomes, and shows that the effects of job complexity differ according to the type of job complexity. The article concludes by drawing out implications for theory, empirical research, and practice. (PsycInfo Database Record (c) 2026 APA, all rights reserved).