Table 1.

Inclusion and exclusion criteria.

Categories	Inclusion Criteria	Exclusion Criteria
Sample	Workers, volunteers, or students currently working in any type of organization	Students
Phenomenon of Interest	Psychological contract breach, or violation, and psychological contract fulfillment	Other work-related topics
Design	Systematic reviews or meta-analyses, including primary studies that reported at least one quantitative assessment of psychological contract breach, or violation, or psychological contract fulfillment	Book reviews, primary empirical studies, corrigendum articles, and theoretical and critical reviews
Research type	Quantitative systematic reviews and meta-analytical syntheses of the empirical evidence Studies published in English and other languages Peer-reviewed published literature	Theses, dissertations, and conference proceedings without peer-review process