Approximately 6.7 million Americans have a diagnosis of Alzheimer disease or related dementias (dementia) and rates are continuing to rise with the increasing aging population [1]. Even with the advent of disease-modifying agents [2], dementia remains a debilitating and incurable disease that impacts cognitive, emotional, social, and behavioral functioning [3,4]. In particular, psychological health concerns, such as stress, anxiety, depression, and social isolation, are common across the illness process and impact outcomes among both persons with the diagnosis and their care network.

More than 11 million Americans are the informal caregivers for a person with dementia [5]. Informal caregivers (ie, someone who provides care for a person with dementia not paid through an agency, often a family member or friend) serve a critical role in providing care for persons living with dementia. Caregivers take on a multifaceted role, including providing direct care assistance (ie, activities of daily living), instrumental activities of daily living (eg, finances and shopping), and emotional support. A large body of literature demonstrates that dementia caregivers report high levels of stress, and often, report a greater impact on mental and physical health than informal caregivers of nondementia illnesses and chronic diseases [6,7]. Depression occurs in at least a third of all dementia caregivers [8]. Increased caregiver stress relates to poor caregiver mental and physical health [9,10] and mortality among their care recipients [11].

Psychosocial factors are interdependent between persons with dementia and their caregivers, such that distress from 1 member of the dyad impacts the other. Evidence suggests that psychologically based dyadic interventions may reduce caregiver burden [12-14] and improve quality of life among persons living with dementia [13]. Dyadic interventions that target the person with dementia, the caregiver, and their interpersonal relationship can have synergistic effects on individual interventions and maximally benefit both members of the dyad [15,16].

Several barriers exist to engaging caregivers and persons with dementia in psychosocial interventions. First, many psychosocial interventions require a trained provider and protected time, often around 60-90 minutes a week for 8-12 weeks. Care is costly, and not always covered by insurance, and dyads often face the price of lost wages and transportation [10]. Furthermore, psychosocial care is overly focused on the early stages of dementia, when the focus is often on education and planning [17]. Additionally, there are few interventions that target the dyad together and even fewer in the late stages [18,19].

Technology can help bypass the barriers as interventions can be delivered at home at the convenience of the dyad and without a trained clinician. A growing body of literature supports the use of technology to provide feasible and effective psychosocial interventions among older adults, specifically those living with dementia and their care partners [20]. Technological interventions are available in several modalities for this population, including mobile apps to improve independent living and cognition among persons with dementia [21] or web-based life-review therapy to decrease depression and increase well-being [22].

A complementary area of research suggests that serious gaming, games intended for purposes other than entertainment (ie, learning) [23,24], may be enjoyable and improve mental health outcomes among older adults with dementia [25,26]. Though the field of serious gaming research is dominated by younger adults, evidence suggests that older adults enjoy serious gaming and are motivated by factors including social wellness and mutual participation to engage in serious gaming [27]. Serious gaming engages users in multiple activities and experiences. Similarly, an emerging field that combines elements of serious gaming with multisensory stimulation [28] (ie, “bio-experiential” design) represents an unexplored opportunity to support persons with dementia (including those with advanced symptoms) and their care partners with important benefits for their well-being. Such interventions can provide accessible opportunities for both persons with dementia and their caregivers to reduce stress and depression and improve well-being [29-31].

In this paper, we aim to describe the protocol for the iterative development of the toolkit for experiential well-being in dementia (TEND), a dyadic technology-based intervention for persons with dementia and their caregivers. We partnered with Studio Elsewhere, a design and technology studio to develop the intervention. TEND combines serious gaming with bio-experiential design to provide dyads with the opportunity to engage in choice-based experiences together with the goal of regulating emotions, supporting interpersonal relationships, and increasing well-being. Furthermore, here we describe a model for the codevelopment of interventions through the partnership of design and development experts and interdisciplinary scientists from an idea to a full product.

Our process follows stage 1A of the National Institutes of Health (NIH) stage model for Behavioral Intervention Development [32,33], which includes the generation of our new intervention TEND. NIH stage 1 involves stakeholder feedback, development of the intervention prototype including the conceptual model, testing through an open pilot with an exit interview, followed by refinement of the intervention and conceptual model. Consistent with guidelines for the development of technology-enhanced interventions, we supplement the NIH model with principles of user-centered design as outlined in the process model for user-centered design [34], see Figure 1. This model was appropriate for this study as it allows for intervention development that is highly iterative and places user feedback at the forefront of design choice, which are necessities for promoting the usability of new technology among persons living with dementia [35]. Though steps may be repeated, our process consists of three key steps (and phases): (1) understanding user needs, goals, and strengths, (2) developing and refining the prototype, and (3) observing user interactions with the prototype [36]. These steps align with stage IA of the NIH stage model and position us to progress to feasibility testing (NIH stage IB), after gaining user feedback in this study.

Our initial conceptual model for TEND (Figure 2) is rooted in the theories of flow [37], positive resonance theory [38], and behavioral or unmet needs theory of dementia [39,40]. As the dyad participates together, we expect TEND to engage putative mechanisms of sustained attention, positive emotions, and active engagement, leading to improvement in outcomes of relationship satisfaction, and distress in dyads, agitation among persons living with dementia, and caregiver burden among caregivers [41].

The Mass General Brigham Institutional Review Board approved all study procedures (2022P001401). Participants reviewed the approved fact sheet and provided verbal consent to all study procedures. In the consent process, participants were informed that all data would be deidentified and that their responses and decision to participate or not participate would not affect the care they received at Mass General Brigham. Providers received US $30 and persons with dementia and their caregivers received US $50 in gift cards respectively for their participation.

Guided by the process model for user-centered design [34] and the NIH stage model [32], above, we have delineated the initial process of user-centered design for a partnership between design and development experts and interdisciplinary scientists. We have engaged in codevelopment through methodology and definition synthesis, focus groups, and β workshops (currently ongoing). Combining serious gaming with bio-experiential design to develop the initial TEND platform, we aim to regulate emotions, support interpersonal relationships, and increase well-being. As bio-experiential technology emerges as a promising field within health care, we have the opportunity to mitigate traditional barriers to effective and equitable dementia care.

Within the development of this bio-experiential design, we outline an effective strategy for academic and design and development team partnership. Multidisciplinary team partnerships are especially beneficial in developing technologies for dementia, as scientific findings and procedures may support adaptations and user experiences [51]. For example, by partnering with researchers, developers are able to address cognitive and functional deficits through adaptations to technology including customization, errorless learning [52], and simple narratives [53]. We adapted to the challenges of codevelopment between distinct teams by establishing a common language and definitions and weekly meetings. The web-based, immersive platform and toolkit developed by Studio Elsewhere is guided by a concept generation and feedback loop incorporating key stakeholders throughout phases I and II.

Through aims 1 and 2 of our partnership, we expect to develop the experimental platform and refine and test the platform. We anticipate these efforts will result in a free interactive, immersive bio-experiential web platform and accompanying toolkit, after subsequent testing for efficacy in a large group of dyads. We anticipate that the resulting technologies will be easily implemented in the home to engage persons with dementia and caregivers in meaningful and relationship-enhancing activities. Consistent with existing literature on technology adaptations for older adults and persons living with disabilities, this study demonstrates various user design considerations, including cognitive, communication, sensory, and physical deficits common with dementia and advancing age [54,55]. In particular, our team is tasked with designing technology that is engaging for both persons with dementia and caregivers, who likely present with varying cognitive abilities and technological literacy. Further, the technology must be appealing and usable across dyads. Our approach outlined here will result in a bio-experiential technology that will be ready for more rigorous testing in the next phase of the work. Following these phases, we aim to conclude with the final stages of user-centered design, observing prospective users’ interactions with the prototype [34]. In future studies, we will optimize the platform through engaging in pilot testing and efficacy testing with the goal of wide implementation.

As the field of technological interventions and serious gaming expands and the need for cost-effective and dyadic interventions increases, there is an urgency for technology-enhanced dyadic and psychosocial intervention in dementia informed by behavioral science. Not only do persons with dementia and caregivers find psychological benefit from technological interventions, but they are often highly enjoyable. Here, we outline a highly collaborative intervention development model to address traditional barriers and promote psychosocial wellness among this population through a bio-experiential intervention.

We anticipate several limitations with this research. Participants must have access to technology equipped with audio and video capture devices to participate in focus groups and workshops, which may exclude low socioeconomic status participants. Additionally, while we engage in β testing workshops over Zoom to replicate real-life environments, the presence of research personnel and design and development team members may unintentionally influence participant reporting on feasibility and usability scales. Furthermore, in research with persons with advanced dementia, the reliability of data is a concern for participants and proxies.

In this protocol, we outline the development of bio-experiential technology for persons with dementia and their caregivers, as well as the partnership between design and development experts and interdisciplinary scientists. This program of research has the potential to address clinical challenges (eg, depression and agitation) among persons with moderate-severe dementia, a population with few evidence-based treatments, and improve outcomes among dyads. Further, the ability to deliver a technology-based intervention in the home has implications for increasing access and translatability. The novelty of a cognitively mismatched dyadic intervention developed based on user-centered design principles will provide a methodological and conceptual framework for future investigators in this field.