Voluntary eye movement measurement tool (VEMMT)

A clinical measurement tool for measuring voluntary eye movements (VEMMT) in typical 6-to-7-months-old infants was developed to measure functional vision for participation. A systematic eight-step process was followed to develop the voluntary eye movement measurement tool and was achieved by four Phases.
Phase 1 was to identify, define and analyse the construct of voluntary eye movements in 6-to-7-months-old infants. The developed VEMMT is based on 4 domains, 5 sub-domains and 26 items. 
In Phase 2, the construct was developed, constructed and administered with video recording. The administrative user manual, administration procedures, outcomes, scoring criteria and scoring sheet were developed and designed. The scoring represents the quality of performances for typical developing 6-to-7-months-old infants. 
The validity of the VEMMT was evaluated in Phase 3 by using the content validity index quantified into a validity coefficient index. The content validity was determined to be extremely high evaluated by experts practicing in the paediatric neurology field.
The newly developed VEMMT was pilot tested in Phase 4. The defined 4 domains, 5 sub-domains and 26 items generated for the voluntary eye movement measurement tool reflected the 6-to-7-months-old infant’s capability for using voluntary eye movements in a naturalistic interaction with persons, objects or environment. This VEMMT allow clinicians practicing in early intervention, to identify, adapt and control the visual inputs that the infant constantly receives from the environment to enhance participation and performance for development in all aspects of life.

为评估典型6至7个月大婴儿的自愿眼动（VEMMT）并促进其功能性视觉参与，研发了一套临床测量工具。该工具的开发遵循了系统的八步流程，并分为四个阶段。第一阶段旨在识别、界定并分析6至7个月大婴儿自愿眼动的结构，所构建的VEMMT基于四个领域、五个子领域和26个项目。在第二阶段，通过视频记录对结构进行开发、构建和实施，并编制了管理用户手册、实施流程、结果、评分标准和评分表。评分反映了典型发育中6至7个月大婴儿的表现质量。第三阶段，通过将内容效度指数量化为效度系数指数，对VEMMT的有效性进行了评估，由儿科神经病学领域的专家认定其内容效度极高。在第四阶段，对全新开发的VEMMT进行了试点测试。为自愿眼动测量工具定义的四个领域、五个子领域和26个项目反映了6至7个月大婴儿在与人员、物体或环境进行自然互动中使用自愿眼动的能力。此VEMMT允许在早期干预中实践的医生识别、调整和控制婴儿从环境中不断接收的视觉输入，以增强其在生活各方面的发展参与和表现。