From the APA's "Journal of Experimental Psychology":
"Empathy is hard work: People choose to avoid empathy because of its cognitive costs" (2019)
(Abstract) or (Full Text PDF)
Further reading on this subject:
"How resource sharing resists scarcity: the role of cognitive empathy and its neurobiological mechanisms" (2022)
"Empathy moderates the relationship between cognitive load and prosocial behaviour" (2023)
"Cognitive load and moral decision-making in moral dilemmas under virtual reality: the role of empathy for pain" (2025)
(Abstract)
"The Influence of Cognitive Load on Empathy and Intention in Response to Infant Crying" (2016)