Healthcare | Free Full-Text | Assessing the Hands-on Usability of the Healthy Jeart App Specifically Tailored to Young Users
2. Materials and Methods
2.1. Study Design, Setting, and Participants
This is an exploratory and descriptive study that is part of an applied investigation, specifically within the domain of user experience analysis. The population consisted of 190 primary and secondary school students from a public–private school in the province of Andalusia (Spain), who installed the Healthy Jeart app on their electronic devices. Convenience sampling was selected based on the practical considerations arising from constraints on time and resources. Given the nature of our study, which necessitated the involvement of individuals with specific experiences—such as using the app over a defined period—convenience sampling provided a straightforward method to access participants meeting these criteria, as they were readily available within our immediate surroundings.
Prior to the commencement of the study, the necessary official approval was diligently acquired. The ethical considerations and protocols were formally reviewed and approved by the Research Ethics Committee of the Province of Huelva, under the protocol code PI047/16. This ethical clearance ensured that the study adhered to the highest standards of ethical conduct in research. Following the receipt of ethical approval, an extensive demonstration of the Healthy Jeart application was conducted. This involved presenting the application to the teachers at the school where the project was conducted. Additionally, parents of the young participants were provided with a comprehensive overview of the application’s features. Parents were given ample opportunity to seek clarifications and ask questions regarding the application. Once fully informed, their voluntary and written consent was sought for the participation of their children in the study. The informed consent process aimed to ensure that parents were fully aware of the study’s objectives, procedures, potential benefits, and any associated risks. Upon obtaining parental consent, the Healthy Jeart app was then introduced to the young participants. They were encouraged to actively engage with the application by installing it on their personal devices, such as mobile phones or iPads. This participatory approach aimed to foster a sense of ownership over and familiarity with the application, promoting genuine and voluntary involvement. Throughout the study, ongoing ethical considerations were paramount. The privacy and confidentiality of the participants were rigorously maintained, and any concerns or queries raised by participants, or their parents, were promptly addressed.
Thus, the app was first introduced and utilized within the school premises. Subsequently, the young participants were allotted a two-month period to independently use the app either within or outside the school setting. Succeeding this period, the students were re-engaged, and the usability evaluation tool was implemented within the classroom environment. Participants were prompted to complete a questionnaire designed to gather insights into their views on facets concerning the app’s content, usefulness, browsing experience, and feedback mechanisms. The questionnaire encompassed an evaluation of the app’s overall ease of use and clarity and how it contributed to their understanding of healthy behaviors. This stage of the research occurred during the opening semester of 2022.
To meet the inclusion criteria, the young individuals were required to possess an electronic device capable of installing the app, secure informed consent from their parents, willingly participate in the research, and provide responses to more than 90% of the questions. Five students declined participation in the research, while 84 students completed less than 90% of the questionnaire, resulting in a final count of 101 participants.
2.2. The Usability Evaluation Tool
When formulating the questionnaire, the content validity was ensured using a rigorous process. This involved selecting items derived from literature research, the researchers’ expertise, and consultation with field experts, resulting in a pool of 30 items. This set of items underwent scrutiny by a panel of three university professors specializing in education, computer science, and nursing. Their task was to evaluate the items’ quality, eliminating any ambiguities or any deemed inappropriate and determining their alignment within pre-established facets (Content, Navigation, Utility, Feedback, and Overall appraisal).
From this assessment, facets for which there was no consensus among the jury members regarding the distribution of items were indicated. As a result, 8 items were eliminated due to a consensus of more than 50% between the panel members. The study left 22 items (C1–C22) distributed among the following facets: Content (6), Navigation (6), Utility (4), Feedback (4), and Overall Appraisal (2) on a 6-level Likert scale, from strongly disagree to strongly agree, except for question C18, which was dichotomous (Yes/No). The answer to question C19 depends on the answer to the previous question and is only considered for participants who answered “Yes” to question C18. A score of 4 marks the cut-off point, distinguishing satisfaction from dissatisfaction. Note that for questions C6 and C9, due to their wording, the rating scale was inverted.
We chose a six-point Likert scale due to its increased sensitivity compared to five points, its balanced midpoint to reduce bias, and its ideal balance of detail and simplicity, making it easier for respondents to use compared to a seven-point scale.
Throughout this stage, our primary emphasis was on evaluating the user friendliness of the Healthy Jeart app. Simultaneously, we meticulously scrutinized various aspects related to the tool’s accuracy, specifically its capability to precisely measure the targeted concept—in this instance, the health behavior endorsed by the app. As previously mentioned, our tasks encompassed defining the concepts, conducting an exhaustive literature review, and collaborating with experts to ensure the concepts’ representation was adequate. By applying the tool to a subset of young participants, as evidenced by the presented data, we anticipate identifying potential issues and guiding subsequent adjustments to enhance both clarity and precision. Finally, employing Cronbach’s alpha yielded a value of 0.703 for the overall scale (due to their distinct characteristics, the C18 and C19 items were omitted from the reliability analysis). Furthermore, our analysis confirmed that the removal of individual items did not contribute to a further improvement in the alpha value, signifying the stability of the scale.
Alongside the 22 questions mentioned earlier, the data collection tool encompassed an initial section aimed at profiling the participants. This section gathered information regarding their age, gender, education, experience level, and typical usage patterns with similar applications.
3. Results
3.1. Sociodemographic and Electronic Device Usage Characterization
A total of 101 students, representing both primary and secondary school levels, participated in evaluating the Healthy Jeart app. The gender distribution was nearly equal, with 49.5% girls and 50.5% boys. The group’s average age was 13.27 years, ranging from the youngest participant at 11 to the oldest at 17. The majority (80.2%) of participants were enrolled in secondary school.
Regarding electronic device usage, our findings revealed that a significant majority (52.5%) spend between 2 to 4 h daily using screens. Their screen time serves both entertainment and study purposes, although 33.7% of participants exclusively use these devices for entertainment. In Spain, particularly at the school where this study occurred, students are usually not permitted to use mobile phones during regular classes, with exceptions being infrequent and primarily for educational reasons. Consequently, when we refer to time in this context, it pertains to periods outside of regular school hours.
3.2. Usability Analysis
It is important to highlight that among the 20 examined items, 17 (85%) showcase over 90% of responses above 4, indicating widespread satisfaction within the majority of the sample. Only items C6 and C12 demonstrate comparatively lower satisfaction percentages, with the latter being the sole item where less than 70% of students scored above 4. Therefore, a considerable proportion of young individuals find the information within the app to be overly extensive and difficult to comprehend (C6). Additionally, they encounter challenges in identifying the entity that funded the Healthy Jeart app (C12). Notably, question C21 exhibits 100% of responses surpassing the cut-off value. Questions C2, C5, C13, and C20 were also very close (99%) to unanimity in terms of response.
Analyzing the different facets globally, we see that the average response is higher than 5 in all of them, which would correspond to above the moderately satisfied level, with the feedback facet showing the best values ( = 5.56), followed by the Utility ( = 5.46), Overall Appraisal ( = 5.44) Content ( = 5.34), and finally Navigation ( = 5.23) facets.
Regarding question C18 within the Feedback facet, we found that 27.7% of respondents asked questions or made some kind of comment directed at the technical team, and of these, only 46.43% received feedback (C19).
4. Discussion
Educators and healthcare practitioners working with young individuals need to embrace fresh roles and perspectives to effectively address modern challenges. This includes adapting to the impacts of globalization and the increasing technological advancements shaping our world.
In this setting, to address the necessity of assessing the usability of the Healthy Jeart app, we designed a questionnaire comprising 22 questions distributed across five different facets. This questionnaire was introduced to parents and teachers initially and subsequently administered to a cohort of 190 primary and secondary school students from an Andalusian school.
The sample consisted of 101 youths, with an almost equal representation of both genders, averaging around 13 years old, and predominantly attending secondary school.
Lastly, when assessing efficiency—measured by the relationship between the resources expended and outcomes gained—remarkably favorable values were attained. This is notably apparent, especially in question C5 (99%), which focuses on the clarity of information delivery across the app and its ease of retention.
It should be noted that questions C18 and C19 need to be reworded so that they can be assessed using the same measure as the other parameters. We also think that the inverse wording of items C6 (76.2%) and C9 (86%) may have made it difficult to interpret and answer, so they will also be rewritten.
To enhance the Healthy Jeart app, we will revamp the information structure for a more user-friendly experience. We will add detailed explanations and revise the FAQs and guides, along with links to external resources. The search feature will be improved for easier navigation. A dedicated section will be created for Project Funding Information, offering comprehensive details about the funding organization, including the mission, vision, and contact information, with direct links to its official website for additional information.
We will implement an improved feedback system within the application to facilitate users in expressing their opinions on the provided information and proposing enhancements. Our commitment extends to regular updates, ensuring the currency and relevance of information. Users will be promptly notified of updates and improvements through push notifications or in-app messages. Additionally, we intend to conduct comprehensive usability testing involving a diverse user group from various contexts to identify and rectify any potential issues related to navigation or information accessibility. By addressing these components, we are confident in our ability to significantly enhance the user-friendliness and informativeness of the mobile application, thereby elevating the overall user experience and satisfaction.
5. Conclusions
In terms of strengths, we include the ability to convey which healthy habits are advisable and which are not, the clarity of the content, the accessibility during navigation, the quality of the installation tutorial, and the clear identification of the objectives to be achieved using Healthy Jeart.
Among its possible weaknesses, which therefore show a path for improvement, we highlight that the volume of information provided by the application can be very dense and the mechanisms for confirming receipt of messages and suggestions should be more successful and faster. The first of these aspects will be addressed in a future update. Since this result came to light, the second has already been taken into consideration, as it mainly affects the support team, tasked with responding more quickly, as practically all the suggestions and comments have been answered since the application was rolled out. While our study provides valuable insights into health-related applications, it is essential to recognize and address certain limitations inherent in our methodology. Convenience sampling, which we employed, entails limited control over variables that could potentially influence the study outcomes. This lack of control poses challenges in isolating specific factors and establishing definitive causal relationships.
Another critical consideration pertains to the extrapolation of our findings to other health-related applications. We acknowledge the significance of this concern. While the questionnaire was specifically crafted for a particular application, certain aspects of its structure and questions may be adaptable to more widespread use. However, we advise exercising caution in direct extrapolation, as the questionnaire’s effectiveness could vary based on the specific context, features, and objectives of other health-related applications. Further research and validation would be imperative to assess its applicability beyond the scope of our current study.
6. Contributions and Future Directions
This research has significant implications for various stakeholders, including health professionals, teachers, parents, and other educators working with teenagers. Health practitioners can leverage insights from the Healthy Jeart app’s usability analysis to recommend effective digital tools for promoting positive health habits among adolescents. Teachers can use the findings to enhance virtual engagement and integrate digital health applications into educational strategies. Parents and educators gain clarity on app strengths and weaknesses, aiding informed decisions on incorporating digital health tools into daily routines.
The study lays a foundation for future research on digital health applications, offering a framework for evaluating their usability and effectiveness. The commitment to addressing app weaknesses reflects a culture of continuous improvement, setting a precedent for developers to prioritize user feedback.
This cross-disciplinary research fosters collaboration between technology, health, and education, addressing multifaceted challenges in promoting adolescent health. In conclusion, the study provides valuable insights and a practical framework and sets the stage for future research at the intersection of technology, health, and education.