Figure 4
The heatmap displays several bright yellow and green clusters surrounded by blue areas. The heatmap uses a color gradient ranging from dark blue to bright yellow, where dark blue indicates lower keyword density and bright yellow represents regions with high keyword concentration. At the center, the brightest yellow area corresponds to the keyword “artificial intelligence.” Surrounding it, several green to yellow regions radiate outward, showing related terms forming overlapping clusters. To the right of the central area, a dense yellow-green region includes keywords such as “performance management,” “human resources management,” “recruitment,” “development,” “process,” “strategy,” “workforce planning,” “talent management,” “overall business performance,” “use,” “performance evaluation,” “artificial intelligence techno,” “future,” “era,” “research,” “person,” and “challenge.” To the upper left, a green cluster includes the term “organizational performance” as the second largest, along with others labeled “firm performance,” “h r analytic,” “paper,” “study,” “practice,” “effect,” “implementation,” “technology,” and “human resource.” To the lower left, the moderate green shades include “business performance,” “adoption,” “review,” “industry,” “employee performance,” “company performance,” “integration,” “training,” “company,” “influence,” “field,” “article,” and “business.”Density visualisation highlighting concentrations of research themes. Source: Authors’ own elaboration using VOSviewer software (Van Eck and Waltman, 2010)