Weeks 2025 mental-load typology

You explain to a friend that the dishes are a different kind of work than the annual taxes. The dishes happen every night. They cannot be deferred. The taxes are an episode — once a year, painful, but bounded. Your friend nods. You realize you've been carrying both kinds of work, and the daily one is the part nobody can see is heavier, because it never stops being on the schedule.

There's research for that distinction. It's called the Weeks 2025 mental-load typology, named by Ana Catalano Weeks (University of Bath) and Leah Ruppanner (University of Melbourne) in their 2025 Journal of Marriage and Family paper, A typology of US parents' mental loads (DOI 10.1111/jomf.13057). It's the first peer-reviewed typology to split cognitive labor by task rhythm rather than task count.

The framework: core tasks (daily, recurring, non-deferrable — cooking, cleaning, childcare, scheduling, social relationships) and episodic tasks (less frequent, deferrable — outdoor work, home maintenance, family finances, the annual camp-signup sprint). Across 3,000 US parents, mothers carried 71% of the mental load overall — 79% of daily core tasks vs. 37% for fathers. Fathers took on more of the episodic load. The University of Bath publicized the finding in December 2024.

You're not "doing 50/50 wrong." The 50/50 you negotiated probably split the episodic work cleanly and left the core work disproportionately with the default parent. Weeks and Ruppanner's data sits alongside Daminger's four phases and the USC 73% stat as the modern research-citation cluster behind the mental-load conversation. The load isn't a feeling. The shape of the load is now in print.