Health care systems worldwide face mounting pressure as they contend with limited resources and the increasing care needs of an aging population [1,2]. These strains are particularly evident in home-based care, where access to professional support is often limited. In cancer care, the shift from hospital-based treatment to outpatient and home settings has transferred much of the day-to-day responsibility to family members and close friends [3,4]. These individuals, commonly referred to as informal caregivers (ICs), provide unpaid support and are often the primary source of informal care for people with cancer [5,6]. They often struggle to navigate their roles because they lack access to the essential information, guidance, and resources needed to provide adequate care at home [7-10].

The emotional and physical toll of caregiving can be significant, affecting ICs’ overall well-being. It often leads to mental health challenges such as anxiety, depression, and symptoms of post-traumatic stress [11-15]. Over time, ICs may begin to lose a sense of their own identity as their lives become increasingly centered around the illness of their patients. These difficulties are made worse when the support systems and information needed to manage care at home are limited or hard to access [16]. Therefore, ICs often express a strong need for external support and guidance to feel more confident and capable in their roles [17,18]. This is where the concept of preparedness for caregiving becomes relevant. Preparedness refers to ICs’ perceived ability to provide physical and emotional support while also managing the stress of caregiving [19]. Higher levels of preparedness have been linked to lower caregiver burden and better outcomes for both ICs and patients [3]. Given these challenges, digital tools such as web-based applications offer promising opportunities to support ICs. These eHealth systems can serve as accessible platforms for delivering tailored information, emotional support, and practical guidance to those providing cancer care at home [12,16]. However, acceptance and use of eHealth systems remain uncertain, highlighting the need for further research on design strategies that ensure the meaningful involvement of relevant stakeholders throughout the development process [20-23].

Human-centered design (HCD) is a foundational approach for developing technology in the human-computer interaction (HCI) field. HCD emphasizes placing users’ needs, preferences, and contextual factors at the core of the design and development process to create effective and user-empowering systems [23]. Even though HCD is widely accepted and used, it often falls short of meeting users’ specific needs, making them feel disconnected and unsupported [24,25]. One major reason for this gap is how HCD is applied. When used in a limited or inconsistent way, especially without genuine and ongoing stakeholder involvement, it can become more of a label than a clear design method. Consequently, although HCD holds significant potential to enhance the usefulness and user-friendliness of technology, its impact remains limited when it is not implemented consistently and systematically in practice [25-28].

The HCD process has primarily focused on usability and functionality, but there is growing recognition that technology should also support users’ well-being [29-34]. Well-being is a multifaceted concept that includes physical health, mental and emotional stability, social relationships, economic security, access to education and health care, environmental conditions, cultural aspects, personal safety, and overall life satisfaction [35]. People tend to use technologies that satisfy their functional needs and enhance their physical and psychological well-being [34]. In the field of psychology, well-being is often understood in two ways. Hedonic well-being is about feeling good, seeking pleasure, and avoiding discomfort. On the other hand, eudaimonic well-being is about personal growth, having a sense of purpose, and reaching one’s full potential [36,37]. Eudaimonic motivation is a person’s inner drive to grow, learn, and seek meaningful experiences in life [36]. Research on hedonic aspects is more established. For instance, the well-known extended Unified Theory of Acceptance and Use of Technology (UTAUT2) model evaluates technology acceptance by integrating hedonic motivation as a key factor in technology acceptance and use [38]. However, there is a noticeable scarcity of research that explicitly examines how eudaimonic motivation can be systematically integrated into the HCD process [39-42].

Some recent studies have sought to evaluate eudaimonic motivation quantitatively [33,42,43]. For instance, Woźniak et al [42] combined insights from psychology to develop the Eudaimonic Technology Experience Scale, which aims to quantify the meaningful interaction of users. Similarly, Kuriakose and Nagasubramaniyan [39] extended UTAUT2 to assess the acceptance of digital entertainment applications. Despite some attempts to evaluate eudaimonic motivation quantitatively, a significant gap remains in the qualitative understanding of how eudaimonic motivation influences technology acceptance and use, particularly in complex and emotionally sensitive domains such as caregiving for relatives with serious diseases. Moreover, these studies focus exclusively on the evaluation phase of the HCD process. This study integrates eudaimonic perspectives from the early stage of the HCD process, with the aim of supporting users’ psychological well-being.

Carer eSupport is a multidisciplinary project combining HCI, software engineering, cancer nursing, and medical and health care science expertise. It seeks to develop a web-based application that improves ICs’ preparedness for caregiving and promotes their overall well-being [3,44]. By equipping ICs with targeted, accessible, and user-friendly resources, the project aims to reduce caregiver burden and positively support the overall health of individuals with head and neck cancer (HNC).

We applied the integrated HCD process with a eudaimonic perspective to guide the development and evaluation of Carer eSupport. The HCD process involved 3 iterative cycles, engaging ICs, health care professionals (HCPs), an expert group of ICs, and technology designers and developers. The collaboration of different stakeholders enabled us to continuously refine the application to understand and address the practical and psychological needs of ICs. The project is currently conducting a randomized controlled trial (RCT) to evaluate the effects of Carer eSupport on ICs’ self-reported preparedness for caregiving, caregiver burden, and well-being, compared to support as usual [44]. A pilot study was conducted at the early stage of the RCT to investigate the feasibility of the procedures and the current version of Carer eSupport. This paper presents the results of the pilot study, which determined whether it was appropriate to proceed with the full-scale RCT.

This paper aims to present how a web-based application can be designed to support ICs’ well-being and preparedness for caregiving through the HCD process. We detail the design and functionalities of the Carer eSupport application and explain how it responds to both the functional and psychological needs of ICs. By integrating HCD with a eudaimonic perspective, this research also intends to provide insights into design approaches that prioritize user well-being in web-based application development.

Additionally, we report findings from the pilot study and highlight the initial challenges ICs faced when engaging with the application and the strategies used to overcome these issues.

In the third iteration of the HCD process, building on insights from previous iterations, the current version of Carer eSupport was developed and is currently being evaluated through an ongoing RCT [44]. Widely considered a gold standard for examining the effectiveness of interventions in health care and behavioral research [52], RCTs use a rigorous methodology where study participants are randomly assigned to either an intervention group or a control group. The random allocation of participants ensures an unbiased comparison by minimizing the influence of confounding variables and helps researchers establish a causal relationship between the intervention and its outcomes [53]. Before proceeding to a full-scale RCT, the last step was to conduct a pilot study to evaluate feasibility, refine procedures, and assess the application’s potential for large-scale implementation. Although this paper outlines the entire HCD process for designing and developing Carer eSupport, it primarily focuses on the outcomes of the third iteration, the pilot study.

In this section, we present the procedures for the RCT and pilot study conducted in the third iteration of the HCD process. Patients aged 18 years or older with HNC scheduled to receive radiotherapy with or without surgical or oncology medical treatment were identified and screened by nurses from ear, nose, and throat or oncology and radiotherapy clinics. Eligible patients were approached by a clinical or research nurse, in person or by telephone, and were provided with detailed information about the study. Consent was obtained to contact an IC nominated by the patient and access information from the medical record about the HNC diagnosis, treatment, and outcome.

Once the patient provided informed consent, the identified IC was contacted using their preferred method (in person, by telephone, or by email) and was provided comprehensive information about the study before obtaining their oral and written consent. Enrolled ICs were then provided with credentials to complete an internet-administered baseline assessment. These credentials included a web address, a unique user ID, a temporary password, and a detailed user guide with screenshots to facilitate navigation. After completing the baseline assessment, ICs were randomly assigned to 1 of 2 participant groups: (1) the Carer eSupport plus standard care group or (2) the standard care-only group. ICs in the Carer eSupport plus standard care group received additional login credentials to engage with the application. The data collection methods, including the primary outcome (preparedness for caregiving), secondary outcomes, and assessment points, are presented in detail in the study protocol [44].

A pilot study was conducted to confirm the feasibility of the study procedures and the Carer eSupport application. Pilot studies in RCTs are essential for gauging the likely success of the main trial and, if needed, refining its design [54]. Thirty ICs participated in this phase. Feasibility was analyzed using predefined progression criteria to determine whether the study could proceed to a full-scale RCT. These criteria were as follows: at least 45% of eligible ICs providing written consent, at least 50% actively using the Carer eSupport application, and an attrition rate below 30% one month after randomization. Meeting these benchmarks would allow the study to proceed to a full-scale RCT; otherwise, recruitment would be discontinued. If the criteria were not met, ICs assigned to the Carer eSupport plus standard care group would retain access to the application for the entire 18-week intervention period. However, no further follow-up assessments would be conducted. Please refer to the study protocol for more detailed insights into the study methods and procedures [44].

In addition, qualitative data were collected and analyzed during the pilot study. One week after the login details were distributed, ICs who had not logged in were contacted by telephone to check whether they required assistance. Two researchers conducted these calls and took detailed notes, which were discussed jointly to ensure a shared understanding of the content. One researcher then analyzed the notes using thematic analysis following Braun and Clarke’s framework [55]. The analysis involved familiarization with the data through repeated readings, generation of initial codes, and organization of these codes into broader themes. Themes were iteratively reviewed and refined to ensure they were grounded in the data and aligned with the study aims. The final set of themes was discussed and agreed upon within the research team, which strengthened the credibility and trustworthiness of the analysis.

All research procedures in the project were approved by the Swedish Ethical Review Council (Dnr: 2020-04650), and the feasibility evaluation is also registered on ClinicalTrials.gov (NCT05028452). The feasibility study was registered at ClinicalTrials.gov (NCT05028452), and the RCT is also registered at ClinicalTrials.gov (NCT06307418).

Informed consent was also obtained from patients, their ICs, and HCPs before their enrollment in the study. Before participating, ICs received a written information letter outlining the study’s purpose and data collection procedures and signed an informed consent form. In addition, a verbal explanation was provided prior to the focus groups and interviews to ensure participants had a clear understanding of the study. No compensation was provided to the participants in this study.

Safeguarding anonymity and privacy was a key ethical priority. Participants were informed that no identifiable personal information would be disclosed in any publications or reports. All interviews were audio- and video-recorded and transcribed verbatim. The recordings were stored securely in Uppsala University’s database and were accessible only to authorized members of the research team.

This section first gives an overview of the current version of the Carer eSupport application, developed during the third iteration of the HCD process. We present the application’s main modules and explain how the eudaimonic perspective is integrated into them. It serves as a practical example of how a web-based application is developed using an iterative HCD process, with a special focus on eudaimonic motivation to enhance ICs’ well-being and improve their preparedness for caregiving. We then present the findings from the pilot study, which indicate that the predefined progression criteria were achieved, supporting the continuation to a full-scale RCT. Finally, we present the initial challenges ICs faced during the pilot study phase when using the application and describe the strategies implemented to improve its usability and accessibility.

The results from the pilot study were satisfactory and met the established progression criteria with a good margin (Figure 7). Among the 30 participants, 20 (66.7%) ICs and 17 (56.7%) patients provided written consent. A total of 12 ICs were randomized to receive access to the application, and 9 out of these 12 (75%) successfully accessed the application. Additionally, 4 out of 30 (13.3%) participants discontinued their study participation.

This study introduced an integrated HCD process that incorporated eudaimonic perspectives to develop the Carer eSupport application to improve ICs’ preparedness for caregiving and enhance their well-being. Our findings demonstrate that IT applications like Carer eSupport can be effectively developed through a multidisciplinary approach that integrates health care science and HCI methodologies. As a web-based application, Carer eSupport required complementary insights from HCI, mainly through an iterative HCD process, to ensure usability and user acceptance. This integration bridges conventional health care research with HCI, developing evidence-based and user-centered technologies, as supported by recent research [56]. To our knowledge, the Carer eSupport project is the first to use this strategy to support ICs of individuals with HNC.

A well-known challenge in HCI, and one central to this work, is balancing personalization with generalization [27,57]. Technologies that reflect ICs’ own situations are often perceived as more useful and engaging. For this reason, the HCD approach used to develop Carer eSupport focused on understanding ICs’ specific needs and caregiving contexts related to HNC. At the same time, practical constraints related to time, resources, and technical feasibility limit the degree of personalization that can be achieved [28,45]. HCI research recognizes that users may differ in their abilities, preferences, values, and life circumstances. HCD processes, therefore, begin with methods such as interviews and focus groups to identify human needs, which are then translated into requirements, personas, and scenarios. However, it is not feasible to design a separate system for each IC. Instead, design efforts focus on groups of ICs that share key characteristics while allowing variation within those groups. This tension was evident during the design of Carer eSupport. ICs preferred content reflecting their own HNC caregiving experiences, while HCPs emphasized the need for practical, sustainable solutions. The final design represents a pragmatic compromise, offering HNC-specific content at the user-group level while remaining relevant to a broad range of caregiving situations.

In this study, we presented the major modules and functions of the Carer eSupport application, explicitly incorporating the factors that may enhance the eudaimonic motivation of ICs. This was a challenging task due to the existing research’s broad and often vague definitions of eudaimonia. Previous research also highlighted that eudaimonic well-being is inherently subjective and can vary significantly from one individual to another [49,58]. For future research, it is essential to contextualize eudaimonic perspectives according to the user group and the contexts in which they interact with technology [17,43,49]. Otherwise, as noted in previous studies, eudaimonia risks becoming a buzzword without precise, practical implementation, despite its importance in technology adoption [27,41].

Our pilot study yielded promising results, with a 66.7% consent rate, a 75% successful login rate among randomized participants, and a low attrition rate of 13.3%. These outcomes met established progression criteria and confirmed the application’s readiness for a full-scale RCT. The study also provided important insights into usability challenges. ICs reported limited time due to demanding caregiving responsibilities, delays in receiving login details, difficulties with authentication, restricted access to suitable IT infrastructure, and limited digital literacy.

We provided multichannel communication via email, SMS text messaging, and follow-up phone calls to overcome these challenges. We also enhanced login instructions, created video tutorials, and provided additional telephone support. All these measures improved the application’s overall usability and accessibility, especially for first-time access to the application. The lessons learned from this study will be valuable in a broader context, contributing to the development and evaluation of complex interventions and to the refinement of RCT procedures for future web-based interventions like Carer eSupport.

As an important first step in the HCD process, understanding the user’s context and the use of technology is crucial for the smooth implementation of IT systems [33,59]. During the evaluation phase of an HCD process, real-world challenges often emerge that were not apparent at the start. For example, while assisting two ICs in logging into an application via smartphone, we discovered that they were attempting to juggle multiple tasks on a single device. The ICs were on a phone call and, at the same time, opened their email to look up their username and password. Afterward, they tried to access the application in another tab on the same smartphone. This multitasking led to repeated errors when entering their login credentials. The 2-factor authentication process, which requires ICs to retrieve and enter a code on the same smartphone, further complicates their access. When the support team asked whether they had access to an alternative device, such as a tablet or computer, the ICs said they had no other device available. After several attempts and extensive assistance from the support team, the ICs finally managed to log in to the application; however, it was not an easy process for them. Such cases highlight that while understanding user context is emphasized early in the HCD process, vital insights often emerge during evaluation. Such experiences, as highlighted in previous research, underscore the importance of iterative design improvements to ensure systems are more effectively aligned with users’ real-life circumstances [59,60].

Our integration of the HCD process and health care science, enriched by a eudaimonic perspective, offers initial guidelines for creating a framework that can be applied beyond the caregiving context. For technology designers and HCI researchers, especially those focusing on vulnerable groups, this study can inform the design and development of digital solutions that are both evidence-based and empathetic. However, it is worth noting that the study is limited to the pilot study. A complete evaluation of Carer eSupport can only be concluded once the full-scale RCT is completed. We look forward to exploring the full RCT outcomes, particularly regarding improvements in ICs’ preparedness for caregiving and their well-being.

This paper presented the design and development of a web-based application that integrates eudaimonic perspectives within an iterative HCD process to prepare ICs for caregiving and improve their well-being. The pilot study results confirmed the application’s viability for an RCT, as evidenced by high consent, login, and retention rates. However, it highlighted significant user challenges, such as time constraints and technology-related barriers. Integrating the eudaimonic perspective into the application design also proved challenging due to the subjective and nuanced nature of the elements of eudaimonic motivation. Given the limited participant pool in this study, a more comprehensive evaluation is necessary to assess the relevance, effectiveness, and usability of Carer eSupport. This evaluation is currently underway in our ongoing RCT. Results from this study indicate that personalized, interactive web-based applications like Carer eSupport hold considerable potential to support ICs of individuals with HNC.