Research for Practice · PEAR TREE™ Lens
Warmth, Pressure and Relationship
What new neuroscience looks like through the PEAR TREE™ Lens
A new 2026 neuroscience study asks a fascinating question: what happens when warmth, pressure and relationship are experienced together?
For us, the really interesting finding is not simply that warm, deeper pressure was associated with changes in experience and brain activity. It is that sensory input did not appear to operate independently of social context.
The person mattered. The sensory environment mattered. What was happening mattered. And relationship mattered.
That makes this a particularly interesting paper to explore through the PEAR TREE™ Lens.
The research
What did the researchers explore?
Dembling and colleagues investigated how temperature, pressure and social context might work together to influence affective experience and brain activity.
Participants
Sixty five adults were included in the final analysis.
Temperature
A warm or neutral temperature pack was placed on the forearm.
Pressure
Participants experienced either a heavier 20 lb weighted blanket or a much lighter 3 lb blanket.
Social context
Participants viewed photographs of people close to them and photographs of strangers.
While lying in an fMRI scanner, participants experienced these different combinations of warmth, pressure and social context. This allowed the researchers to explore whether sensory experience changed when it occurred alongside a meaningful social context.
The findings
What did they find?
Participants retrospectively reported stronger affiliative feelings during the combined warm and deeper pressure condition than during warmth alone, deeper pressure alone or the neutral lighter pressure condition. These ratings included experiences such as comfort, calm, connection and security.
The brain imaging findings add another layer.
Warmth and deeper pressure together were associated with the greatest activity in the ventral striatum and mid insula while participants viewed photographs of people close to them. The same pattern was not found when participants viewed strangers.
These regions are relevant to reward, salience and interoceptive processing. The researchers therefore suggest that warmth and pressure may contribute to a sensory affective pathway involved in social connection.
That is an interesting possibility. It is not, however, the same as saying that deep pressure universally creates safety, calm or connection.
The part that made us stop and think
The sensory experience and the social context were interacting
It would be very easy to turn this research into a simple headline: “Deep pressure is calming.”
But that would miss much of what makes the study interesting.
The neural response was not simply about pressure. It was not simply about warmth. And it was not simply about seeing another human face.
Warm, deeper pressure was associated with a different neural response when the person being viewed was someone meaningful to the participant.
PEAR
Looking through the PEAR TREE™ Lens
PEAR invites us to consider Person, Environment, Activity and Relational response together rather than assuming that an observable response belongs entirely to the person.
Person
People do not experience touch, warmth or pressure in identical ways. Individual sensory histories, preferences, interoceptive experience, health, neurodiversity, previous experiences of touch, relationships and personal meaning can all shape what a sensory experience feels like.
Even within this controlled study, the authors acknowledge individual differences in temperature perception. Their experiment used standardised sensory conditions because this was necessary for the research design, but everyday practice requires something much more individual.
A weighted blanket that feels containing and comfortable to one person may feel restrictive, unpleasant or threatening to another.
Environment
This study took place in an MRI scanner, a highly controlled and rather unusual sensory environment. Participants were lying still, covered with a blanket, receiving warmth to the forearm and looking at photographs.
Real life is considerably more complex.
Temperature, sound, lighting, physical space, predictability, movement possibilities and the ability to leave or change position may all contribute to how touch or pressure is experienced.
So rather than asking only, “Does deep pressure work?”, we might ask: “What else is happening in this environment that changes how this sensory experience is received?”
Activity
Sensory support only becomes meaningful when we consider what the person is trying, needing or wanting to do.
Resting beneath a blanket is very different from learning in a classroom, eating a meal, getting dressed, travelling on a bus, recovering following illness or trying to participate in a conversation.
Pressure might support participation during one activity while interfering with participation during another.
The occupational question therefore remains important: what is the person trying to participate in, and is this sensory experience helping to make that more possible?
Relational response
This may be the most thought provoking part of the paper.
The same warm, deeper pressure condition was associated with different neural activity according to whether participants were looking at a close other or a stranger.
Relationship was not merely background information. It was part of the sensory context.
Who is offering the support? Is that person known and trusted? Has consent been sought? Does the person have genuine choice? Can they stop? Is the experience predictable? What meaning does this kind of touch have for them?
A sensory input cannot automatically be separated from the relationship within which it occurs.
TREE
From noticing towards thoughtful decision making
TREE encourages us to move from noticing towards thoughtful decision making through Triage, Relational response, Evaluation and Ethics.
Triage
Triage asks what is happening now and what needs attention first. Before reaching for a sensory strategy, we might consider pain, illness, distress, fatigue, hunger, temperature, communication, environmental demand or another unmet need.
Relational response
Relational response asks us to notice what we bring to the encounter. Our pace, proximity, tone, expectations and willingness to listen may change the experience as much as the equipment we introduce.
Evaluation
Evaluation means looking beyond whether somebody became quieter. Did the support improve comfort, agency, engagement or meaningful participation? What did the person themselves tell us about the experience?
Ethics
Ethics asks perhaps the most important questions of all. Is this wanted? Is there meaningful consent? Can the person decline or stop? Are we supporting their goals, or using sensory input to make their behaviour easier for somebody else to manage?
Relationship is part of the sensory context. Consent, trust, predictability, choice and the genuine ability to stop are not optional extras around sensory support.
Hold the findings carefully
This is not evidence that everyone needs a weighted blanket
The findings are exciting, but they need to be held carefully.
This was a controlled experimental study involving predominantly young adults. It was not a clinical trial of weighted blankets, and it did not test whether warm weighted blankets improve participation, anxiety, sleep or regulation in autistic people, children, people with mental health needs or any other clinical population.
The warmth was not individually calibrated.
Participants rated their affiliative emotions retrospectively after the scan rather than during each condition.
The affiliative emotion scale was created for the study rather than being an established validated measure.
Although neural responses and affiliative ratings increased in the warm pressure conditions, the researchers did not find an association between the two.
There was no significant overall three way interaction between temperature, pressure and social target for functional connectivity. One comparison was significant, while most other connectivity comparisons were not.
Research into practice
What might this change in practice?
Perhaps the most useful contribution of this research is that it challenges us to move away from thinking about sensory inputs as if they have fixed properties.
Their meaning emerges through the interaction between the body, the sensory environment, the activity, previous experience and relationship.
Through a PEAR TREE™ Lens, the question therefore changes.
Rather than asking: “Which sensory strategy should we use?”, we might ask:
What is happening for this person, in this environment, during this activity, alongside this relational response, and what might support their agency and participation?
That question leaves room for sensory neuroscience while keeping the person at the centre of the thinking.
Participation begins in the body, but it does not end there
Human nervous systems are embodied, contextual and relational
The paper offers a fascinating glimpse of how sensory and social information may come together in the brain.
We cannot completely understand a sensory experience by describing the stimulus alone. We need to understand the person receiving it, the environment surrounding them, the activity in which it occurs and the relational experience accompanying it.
Perhaps warmth and pressure are useful examples of something much bigger.
Good sensory support therefore begins with curiosity, consent and listening, not with deciding in advance which input should make somebody feel a particular way.
Reference
Read the research
Dembling, S. J., Damon, Z. F., Linke, A. C., Gonenne, M., Hawkins, K., Ross, J., Case, L. K., & Inagaki, T. K. (2026). Warm pressure increases ventral striatum and mid-insula processing of social connection. Social Cognitive and Affective Neuroscience.
DOI: 10.1093/scan/nsag077