Digital Technologies for Deaf and Hard of Hearing Children: a Systematic Review, Critical Reflections, and Future Research Directions

Research Background and Issues

• What problems or challenges did the authors identify?
  The authors identified that the field of Human-Computer Interaction (HCI) lacks a systematic review of research supporting the development and well-being of Deaf and Hard of Hearing (DHH) children. This gap makes it difficult to pinpoint current research challenges, technology usage, design practices, and the specific roles of children in these processes. Moreover, existing literature primarily focuses on adults or the broader category of "children with special needs," neglecting the unique cultural and social barriers faced by DHH children during their development.

• Why is this issue important?
  Globally, 5% of the population (approximately 430 million people) are deaf or hard of hearing, including 34 million children. As a cultural minority, these children face risks of social isolation in environments predominantly designed for hearing individuals. Educational systems often struggle to support their language development or promote bilingual education, resulting in low literacy rates. Additionally, the vast majority of DHH children (90%-96%) are born into hearing families, further exacerbating their disconnection from Deaf culture.

• Research Motivation and Related Work
  Existing reviews on DHH children are scarce and limited in scope, often focusing on algorithmic research or technology evaluation while overlooking the unique socio-cultural needs of these children. This paper aims to fill these research gaps by systematically reviewing technology design and research methodologies, analyzing the roles and needs of DHH children in technology design, and providing guidance for future research.

Solutions

• What methods or solutions did the authors propose?
  The research team conducted a systematic literature review, analyzing 42 papers (published between 2000 and 2024) to investigate trends, methodologies, and the degree of involvement of DHH children in technology design. The study followed the PRISMA review framework, extracting literature from the top 20 conferences and journals in the HCI field indexed in the ACM Digital Library and Google Scholar.

• What are the innovative aspects of this solution?

  1. This review is the first to focus specifically on DHH children rather than adults or other special needs groups, addressing a significant research gap.
  2. It highlights the disconnect between Deaf culture and technology design, advocating for the integration of Deaf cultural perspectives in design.
  3. It innovatively emphasizes the necessity of "active child participation in design" and provides specific guidance for future research.

• What are the implementation steps and key techniques used?

  1. Data Collection: A keyword search (e.g., "deafness," "DHH," "children") identified 295 papers, from which 42 relevant studies were included.
  2. Research Coding: Four researchers collaboratively developed and refined a coding scheme based on dimensions such as research contributions, objectives, methodologies, and the roles of children.
  3. Results Analysis: The study systematically revealed the distribution and trends of technologies and methodologies, with a particular focus on the roles of children in research.

Research Findings

• What specific findings were achieved?

  1. Current research primarily focuses on helping children learn sign language, with most studies failing to systematically consider Deaf culture or the unique developmental needs of DHH children.
  2. Children's roles in technology design are mainly as users and testers, with limited participation; in contrast, hearing adults often act as proxies in the design process.
  3. The technologies discussed in the literature are predominantly based on PCs and tablets, with limited use of mobile devices or wearable technologies.

• What advantages does this solution have compared to existing ones?

  1. The proposed child-centered design approach ensures that children's voices are heard, avoiding designs based solely on adults' subjective understanding.
  2. It critically examines the neglect of Deaf culture in technology design, advocating for culturally inclusive solutions.
  3. It provides standardized recommendations for designing and evaluating technologies for DHH children, offering a more comprehensive perspective than existing studies.

• What are the experimental or evaluation results?
  Through analysis, this review identified key directions for future HCI research:

  • Encouraging active child participation in the design process to enhance their technology usage experience and sense of ownership.
  • Designing communication technologies for mixed hearing environments to support social interaction and incidental language learning.
  • Developing interactive devices that integrate Deaf culture and offer more expressive capabilities, such as mobile solutions based on smart devices.

• Limitations and Future Directions

  1. This study only covers literature from the HCI field, excluding related fields like psychology and education, which may have relevant insights.
  2. It does not directly evaluate specific technology development methods, leaving room for future exploration of practical implementation issues.
  3. The authors advocate for establishing a unified reporting framework, including participant age, gender, language preferences, and hearing status, to improve research reproducibility.

In summary, this paper highlights the underestimation of DHH children's roles in technology design and the neglect of Deaf culture in existing solutions. Through analysis and reflection, it proposes more inclusive and targeted directions for future technology design while calling for greater transparency and standardization in participant reporting. These recommendations provide a solid foundation and clear direction for future research in this area.