發展性協調障礙(Developmental Coordination Disorder, DCD)兒童的視覺處理缺損是影響其動作控制的障礙因素之一，然而目前針對DCD兒童的視知覺表現之相關研究尚未充分，因此本研究以客觀量性的實驗設計來探討DCD兒童與典型發展兒童在視知覺表現的差異。
本研究採方便取樣，招募31位DCD兒童，年齡介於5至8歲（平均年齡6.47歲）及35名典型發展兒童（平均年齡6.43歲），以眼動儀和動作分析系統比較兩組兒童在下列測驗的表現：1. 眼球動作控制測驗（含平順追視、掃視及反掃視），2. 電腦化泰迪熊刪除測驗（視覺搜尋能力），3. 功能性按鍵任務（視覺搜尋及眼手動作連結能力）。
研究結果發現DCD兒童的基礎眼球動作控制與典型發展兒童能力相近，並無顯著的缺損。但在高階的視知覺認知能力上，相對於典型發展兒童，DCD兒童缺乏有組織的搜尋策略，泰迪熊刪除測驗表現明顯較差：所花時間較長、凝視點較多、視覺搜尋品質亦較低。在功能性按鍵任務中，DCD兒童不論是手部還是眼球動作的移動時間皆顯著較典型發展兒童長，且隨著動作階段增加，DCD兒童眼、手起始與結束的連結程度越低。
整體而言，DCD兒童在基礎眼球動作控制上沒有顯著的缺損，在較複雜的視覺搜尋及合併動作的眼手連結任務中表現明顯較差；然兒童日常生活活動大多為複雜的視知覺任務，因此DCD兒童的視知覺缺損，勢必影響其日常適應表現。因此建議臨床治療師在分析DCD兒童的問題時，應將視知覺能力對動作控制的影響納入考量。

Although the underlying causes of Developmental Coordination Disorder (DCD) remain unclear. Visual perceptual disorder was one of the possible accounts to explain movement clumsiness in children with DCD. Data related to the visual performance of children with DCD, however, have been conflicting and rare. The aim of this study was to explore and compare the visual perceptual performances in children with DCD and typically developing (TD) children.
This study used a convenience sample of children, aged between 5 and 8 years, divided into two groups: DCD (n = 31, Mean age = 6.47) and TD (n = 35, Mean age = 6.43). Eye tracker and motion analysis systems were used to compare their visual perceptual performance in the following tests: 1. oculomotor control tasks (smooth pursuit, saccade and anti-saccade), 2. Computerized Teddy Bear Cancellation Test (visual scanning ability), 3. three calculator buttons pressing task (visual scanning and eye-hand coupling performance).
Children with DCD and TD children performed similarly in the oculomotor control tests, which are fundamental skills of visual perception, but showed significant impaired performance in complex visual perceptual tasks, such as visual scanning and eye-hand coupling. Children with DCD lacked of organized searching strategy, so they demonstrated longer completion time, more fixation points and lower visual scanning quality. In the 3 calculator buttons pressing task, children with DCD showed longer hand movement time and eye movement time. Furthermore, eye-hand coupling in children with DCD was decreased as the task demands were increased.
In summary, our data suggested that children with DCD had no impairment in the fundamental oculomotor control skills, but showed significantly deficits in the visual cognitive level of skills, such as visual searching and eye-hand coupling abilities. Most of the daily activities are complex visual-motor tasks, so the impairment of visual cognition do had significant impacts on the visual adaptive performances. Our findings suggested that clinicians should concern the influence of visual impairments on the motor performance in children with DCD.

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