Companion Robots and Dementia

What a large Paro trial found

A large randomised test of Paro is the cluster trial by Wendy Moyle and colleagues, published in the Journal of the American Medical Directors Association in 2017. It covered 415 residents with dementia in 28 long-term care facilities in South-East Queensland, comparing Paro with an identical plush seal whose robotic features were switched off, and with usual care. Sessions lasted 15 minutes, three times a week, for ten weeks. Paro drew more verbal and visual engagement than the plush toy, and both improved mood compared with usual care. The authors concluded that Paro was only more effective than the plush toy at encouraging engagement, a useful check on expectations.

What pooled studies suggest

A 2023 systematic review and meta-analysis in the International Journal of Nursing Studies brought together 12 articles covering 1,461 participants. Abdul Rashid and colleagues found a moderate effect on reducing medication use, small effects on anxiety, agitation and depression, and a negligible effect on total sleep time, with narrative evidence of less apathy and more sociability. They also warned that the results should be read with caution because few studies were available, and called for larger and more rigorous trials. For a family or care team, the fair reading is that a robot pet may help some people some of the time, and that each person's response matters more than an average effect.

Ethical concerns raised by carers

Caregivers' views were pulled together in a 2025 review of 15 qualitative studies, also in the International Journal of Nursing Studies. Most carers were positive, describing calmer residents and some relief for staff. They also raised concerns: that giving an adult a robot animal can feel like treating them as a child, that some people may not realise it is a machine, that dependence could crowd out human contact, that the robots are expensive, and that they still need staff to manage them. Some reported limited usefulness for people with advanced dementia. These points argue for offering a robot as a choice, explaining what it is where possible, and watching how each person responds.

Bringing a robot pet into a care routine

Introduce the robot at a calm moment, with a familiar carer present, and let the person decide whether to engage. Keep sessions short at first and record reactions, including signs of distress, since a robot that soothes one resident may unsettle another. Clean it between users and keep it charged so it is ready when needed. Cost deserves an honest look too. With the Paro Seal listed at about $6,000 in October 2026, and the Moyle trial finding that a plush seal also lifted mood compared with usual care, a home can reasonably try both and compare. A robot should add to activities and conversation, and never replace time spent with staff and family.

Sources and further reading

• Use of a robotic seal as a therapeutic tool to improve dementia symptoms: a cluster-randomized controlled trial — Journal of the American Medical Directors Association (ScienceDirect).
  Trial of Paro against a plush toy and usual care with 415 residents in 28 Australian care facilities.
• The effectiveness of a therapeutic robot, 'Paro', on behavioural and psychological symptoms, medication use, total sleep time and sociability in older adults with dementia: a systematic review and meta-analysis — International Journal of Nursing Studies (ScienceDirect).
  Pooled analysis of 12 Paro studies, with effect sizes for agitation, mood, medication use and sleep.
• Exploring the perceptions and experiences of caregivers with the application of socially assistive robots in dementia care: a systematic review of qualitative studies — International Journal of Nursing Studies (ScienceDirect).
  Review of 15 qualitative studies on what carers value and worry about when robots are used in dementia care.

Common questions

How should a care home keep a shared robot pet clean?

Agree a routine with your infection prevention lead before the robot is shared between residents. Follow the maker's instructions on which wipes are safe for its fur or casing, never immerse it, and keep a simple log so staff can see when it was last cleaned and by whom.

Can we use a robot seal for a relative living at home?

You can, though most research has taken place in care homes. Introduce it when a family member can stay for the first sessions, keep it somewhere the person can reach easily, and make sure charging and cleaning will not depend on someone with memory problems.