The mental load: what it is, and how it gets measured

The mental load is not the washing-up: it is knowing that it has to be done, knowing when, and checking that it was. The idea comes from the sociology of work. Monique Haicault set it out in 1984 in an article on the ordinary management of a life lived in two halves, describing the mental work of anyone holding together two spheres, the job and the home, without being able to leave either.

A study published in 2019 in American Sociological Review gave that intuition an analysable shape. Working from 70 interviews with 35 couples, Allison Daminger split this labour into four operations: anticipating a need, identifying the available options, deciding, then monitoring that the decision has the intended effect. Women carried a larger share overall, and the gap concentrated on anticipation and monitoring; the deciding itself was more evenly split.

• Knowing the school canteen menu changes next week, and that one child will eat nothing that day.
• Thinking about the birthday present three weeks ahead, not the night before.
• Knowing everyone's shoe size without having to ask.
• Knowing two doses of detergent are left, and having written it down somewhere.
• Remembering the dentist appointment falls on a school day.
• Noticing a relationship at home has tensed up, and deciding when to raise it.

The phrase left the sociology journals on 9 May 2017, when the French cartoonist Emma published a comic describing exactly this asymmetry, built around the line partners use to end the conversation: you should have asked. It circulated widely and carried the expression into everyday French, more than thirty years after its academic formulation.

Housework has been measured for a long time, and it is measured well: time-use surveys ask people to record what they do, hour by hour. In France, Clara Champagne, Ariane Pailhé and Anne Solaz analysed twenty-five years of those surveys in a 2015 article. In 2010, women performed 71% of household tasks and 65% of parenting activities.

Those figures describe actions performed. The mental load produces none. Anticipating cannot be seen, deciding does not last long enough to enter a diary, and monitoring has neither a start nor an end. That is why an evenly split list of chores can sit alongside a completely lopsided load, and why the conversation so often goes nowhere.

Three reasons stack up. This labour leaves no material trace. It runs while something else is happening: on the commute, in the shower, at two in the morning. And it is often invisible to the person carrying it, because it passes for a character trait: being organised, being the one who plans ahead, being the one who thinks of everything.

A study published in 2019 in the journal Sex Roles surveyed 393 partnered mothers in the United States about how this invisible labour was divided. A majority reported that they alone handled organising the family's schedules and keeping order at home. Feeling disproportionately responsible for that management was associated with lower personal well-being and lower satisfaction with the relationship.

A theoretical article published in 2022 argued for holding together two components usually treated separately: cognitive labour, which plans, and emotional labour, which takes charge of other people's mood and comfort. Putting them together explains the sense of never being off duty: you can stop acting, you do not stop being responsible.

Not yet with any single reference instrument, and that is the honest answer. A systematic review published in 2023 in Sex Roles gathered 31 peer-reviewed articles devoted to this cognitive dimension of unpaid household and childcare work. It finds that the measures used are recent, inconsistent and rarely comparable from one study to the next. It nonetheless concludes that women carry the larger share, particularly where children are involved.

A study published in 2024 covering 322 mothers in the United States compared, within the same households, how cognitive labour and physical housework were divided. The women's share was more lopsided for the first than for the second, and it was cognitive labour that showed the strongest association with measures of exhaustion, stress and strain on the relationship.

What an online questionnaire can do is therefore limited, and it is better to write that down than let you guess it: it does not measure a quantity of load, it helps name it and see where it concentrates. The Brain Quiz self-observation questionnaire on the mental load offers 24 concrete situations across four axes, household load, work load, relational load and recovery, for an immediate result in about seven minutes.

Its items were written for this site from the literature in the sociology of domestic work and in occupational psychology. No published scale is reproduced in it, its weights and bands were set by the editorial team, and none of them come from calibration on a population. The link is at the foot of this page, and the questionnaire's methodology page sets out the scoring in detail.

Naming redistributes nothing, but it is the condition for everything else: as long as this labour has no name, the conversation stays about chores and ends with you should have asked. Five concrete moves, all of them for two people.

1. For seven days, keep a list of everything you keep an eye on without doing it yourself. Write it down: the written list is what makes the volume visible, not the retelling.
2. Separate doing from carrying, every time. Taking the bins out is not the same thing as knowing which day they are collected.
3. Hand over whole areas, not tasks. Handing over medical appointments, from the calendar to the pharmacy, genuinely lifts something; handing over make this one appointment lifts nothing.
4. Set a short, regular check-in where you look at the list rather than at the mood of the moment. Once a month is enough.
5. Come back to it three months later. What matters is not the score but the shift between two readings.

A closing word on the gendered dimension. It is constant in the data quoted here: 71% of household tasks in France in 2010, a larger share of cognitive labour in the American work. Those figures describe population averages. They say nothing about your household in particular, and a home where the load is carried by a man, or genuinely shared, is not a statistical exception to be corrected.