Framework

Triple Diamond Design–Research Process

We structured the project around an integrated design–research process we call the triple diamond, built upon the Design Council’s double-diamond model. We added prototyping and evaluation to the diverging and converging process, reflecting our commitment to feeding findings back into the design rather than treating delivery as the end point.

Triple diamond design-research process diagram showing three phases: Define, Design, and Deliver, with diverging and converging tracks for both the design process and research process

Triple-diamond framework mapping design activities in the upper track and research activities in the lower track along three diverge-converge cycles (image excerpted from the published journal article: https://doi.org/10.1111/joid.12164)

Design Development

Building a Hub for Diverse Sensory Needs

Design Criteria

After literature reviews, we created design concepts and held a scientific advisory summit. Six experts in atypical sensory processing came to our office to review the early design. Drawing on their input and literature reviews, we developed 10 design criteria to guide the hub design.

Criterion Description
Quality and Safety"Do no harm" by providing a safe place for students
Separate but AccessibleEasily accessible from classroom, but separate to minimize disturbance
Tunable EnvironmentAdjustable environmental attributes, such as sound and light
Sensory AffordanceSupports a range of sensory stimulations across modalities
IntuitiveEasy to use; does not require instructions
Affordable and Non-proprietaryBuilt with local materials, services, and elements
VersatileMulti-functional, offering stimulation and respite
ModifiableSensory elements can be changed as needed
ScalableAccommodates different spaces and budgets when reproduced
DurableWithstands aggressive outbursts and forceful handling

Final Design

Axonometric diagram of the sensory hub showing three zones (active, respite, and sensory cocoon) and two entryways: a tactile car wash and an open transition with nature imagery

Sensory hub layout with three zones (active, respite, and cocoon) and two entryways (image excerpted from the published journal article: https://doi.org/10.1111/joid.12164)

Research Methodology

Data Collection and Analysis

Participants

  • Of 59 students in the school’s special education program (ages 14–21), 29 initially consented. Four later dropped (reached age 22 or transferred), leaving 25 participants (20 males, 5 females; mean age 16.7).
  • 12 with ASD; 14 with intellectual disability ranging from mild to severe.
  • 8 consented students, 4 teachers, and 6 staff members participated in focus groups.
  • Log-in and media wall data captured visits from all 43 students who used the hub, not only those who consented.

Data Collected

Source What was collected Sample size
Environmental sensors
  • Sound intensity, illumination, temperature, relative humidity, and occupancy, recorded every 3 seconds
  • Five sensor sets: inside cocoon, on each zone wall, and in the nesting classroom
  • Excluded after-hours, weekends, and school breaks
Millions of data points
Focus groups Two teacher groups, two staff groups, and three student groups, describing hub usage and preferred sensory elements n = 8 consented, high-functioning students, 4 teachers, 6 staff (18 total)
Usage logs
  • Time in and out, elements used, and reason for visit (from semester two onward) on printed log sheets
  • Recorded by staff; some visits went unlogged
  • One log sheet was missing
n = 444 total logged visits; n = 43 students
Behavior mapping
  • Structured observations of students' interactions with each element during one week
  • Used to validate usage logs and gain additional insights
n = 60
Media wall sensor data
  • Posture (sitting vs. lying), location (tensile fabric vs. floor), and screen interaction
  • Data collected via Microsoft Kinect depth camera using x, y, z coordinates and face angles
  • Technical issues limited usable data to the final six weeks
n = 167
Sensory profile surveys Adult/Adolescent Sensory Profile (AASP; Brown & Dunn, 2002): 60-item, 5-point Likert scale across four quadrants n = 15 of 25 consented, high-functioning students
Key Findings

Hub Used Primarily for Calming and Respite, With Divergent Preferences by Diagnosis

Environmental & Occupancy Sensor Data

  • Median sound intensity was 3 dB(A) lower inside the cocoon than in the other zones, which was a non-negligible difference on a logarithmic scale.
  • Illumination levels fluctuated greatly throughout the day; they were lower in the sensory cocoon by a median of ~4 lx than in the adjoining classroom.
  • Temperature and relative humidity were stable across all zones and within recommended ranges.
  • Occupancy sensor data indicated usage patterns that were not included in the logged visit data. The school confirmed that some students in the general education program also used the hub.

Analysis: Descriptive statistics

Notes: Used median values, not means, because observed sound intensity levels were sometimes lower than what the sensors could assess.

Hub Used Mainly for Respite

  • Teachers and staff primarily perceived and used the hub as a resource for overstimulation and hypersensitivity, but not for hyposensitivity.
    • 13 out of 59 students had scheduled visits to prevent sensory overload, which accounted for 41% of hub visit log entries vs. 25% student-initiated and 9% following an outburst.
    • Students reported visiting the hub for calming down, relaxing, and feeling better when distressed by noise and other students' behavior in the classroom.
  • The school’s policy was to limit hub visits to 10 minutes, which aligned with the dwelling times logged by staff.

Analysis: Descriptive statistics, Content analysis, Thematic analysis

Sensory Element Usage

  • Compression, proprioception, and tactility were most sought.
    • Beanbag with weighted blanket (39% of logged visits, in respite zone), sensory cocoon with tensile fabric and media wall (24%), and fidget wall (23%, in respite zone) were most used.
  • Students used some elements in unexpected ways, e.g., small bags of grains for tactile engagement were more frequently used to hear the sound of the grains.
  • A few students developed routine element use sequences during scheduled visits.
  • Behavior mapping found that brief element interactions were often unlogged, particularly active zone elements, such as the sound wall and trampoline.

Analysis: Descriptive statistics

Respite Zone showing beanbag with weighted blanket, fidget wall components, and nature projection

Respite zone

ASD vs. Non-ASD: Sensory Element Usage

  • Students with and without ASD had equivalent sensory profiles but divergent usage patterns. ASD students were 2.23× more likely to use the sensory cocoon during scheduled visits.
    • ASD students were less likely to use the beanbag, sound wall, and pin wall. They used the pin wall and sound wall mainly during unscheduled (distress) visits.
    • The aquadoodle was used exclusively by students with ASD. Individual variation was substantial even within each group.

Analysis: Repeated-measures logistic regression

Frequently used sensory elements per logged visits
Respite Zone
Beanbag + blanket
39%
Fidget wall
23%
Active Zone
Spun chair
12%
Sound wall
12%
Trampoline
7%
Car wash
7%
Pin wall
6%
Sensory Cocoon
Cocoon + media wall
24%
Elements preferred by students with ASD

Data excerpted from the journal article: https://doi.org/10.1111/joid.12164

Sensory Cocoon Usage

  • The mean dwelling duration in the sensory cocoon was 3 minutes 45 seconds (n = 167 visits overall).
  • Media wall sensor data indicated that students sat 61% of the dwell time and lay down for 32%.
    • One of the students reported that he felt he was too heavy to sit on the tensile fabric.
  • Staff reported that some students quickly learned how to use the media wall while others needed help.
    • Teachers and staff reported they occasionally had technical difficulties with the media wall.
  • The permanently installed tensile fabric inside the cocoon limited wheelchair users' cocoon usage.
A student seated inside the sensory cocoon interacting with the tensile fabric seating and interactive media wall

Sensory cocoon

Active and Respite Zone Usage

  • Staff guided students with severe cognitive impairments to tactile elements in active zone; higher-functioning students liked engaging with visual and auditory elements.
  • Individual variation extended to element rejection: one student disliked the car wash; another disliked the trampoline.
  • Three students in the focus groups appreciated the metal texture wall (active zone), but it was neither logged nor mentioned by staff due to students' brief interactions with it.
  • One of the students, who had obsessive–compulsive disorder, dismantled the Lite-Brite (respite zone) because he could not stand a corner of the panel peeling off, indicating that minor imperfections can disturb neurodiverse students.

Analysis: Descriptive statistics, Content analysis, Thematic analysis

Active Zone showing sound wall, texture wall, spinning wall, rolling pins, and pin wall

Active zone

Impact

A Replicable Model for Inclusive Design

  • A modular, adaptable sensory hub was installed and operated successfully.
  • Hub efficacy was assessed in a real school setting through a year-long, multi-method evaluation including environmental and occupancy sensor data, depth camera data, usage logs, behavior mapping, focus groups, and surveys.
  • The hub provided students with a dedicated space for sensory regulation and respite during the school day.
  • Both special education and general education students used the hub.
  • Hub design and instructions were published as open source to help other schools and organizations better accommodate students with atypical sensory processing. The project was exhibited at SXSW EDU and published in two journals to disseminate it further.
  • Our firm has since incorporated sensory hub concepts into other projects, including schools and hospitals.
Reflection

Co-creation, Modularity, and the Limits of a Single Site

Co-creation for Social Impact

This was one of the most meaningful projects of my career, both for its social impact and for my end-to-end involvement from concept through post-occupancy evaluation. Collaborating with designers, researchers, and partners from a blank-slate concept through post-occupancy evaluation showed what an integrated process could produce when both sides had genuine stakes in the outcome. The project was recognized with the EDRA Certificate of Research Excellence and the JID Best Paper Award. This project later inspired some of my other projects, like the persona-building kits.

The kit-of-parts approach—designing the hub as a modular, adaptable structure that could be plugged into any space—was one of our most deliberate and generative decisions. It made the project replicable and opened the door to embedding sensory hubs in classrooms, workplaces, airports, and other settings where neurodiverse individuals are frequently underserved.

Limitations

The study had several limitations. It collected data at a single site with a small sample (n = 25 consented; 15 able to complete the sensory profile survey), limiting generalizability. Log quality depended on staff diligence. Time constraints led to no pre-installation comparison data and delayed calibration of the machine learning model that identified student postures and assigned IDs via the Kinect depth camera. Insufficient training and unclear eligibility policies made it difficult to measure sustained results over time. The school used the hub mainly for hypersensitivity, not hyposensitivity, even though it was designed for both. Some staff also did not fully understand how to use the media wall. The cocoon’s tensile fabric was not wheelchair-accessible, excluding some students entirely. Minor physical imperfections (e.g., a peeling panel corner) could be highly disturbing to students with conditions like OCD, pointing to ongoing maintenance as a design consideration.