目的:稜鏡調適法為近年來對忽略症所採取之重要的新興療法。文獻已顯示患者在接 受每天 1 次，一週 5 次，持續兩週共 10 次的稜鏡調適療程後可獲得正向的療效。然而， 因國內多數門診個案每週僅接受 2-3 次的職能治療，導致傳統稜鏡調適法執行上的困難。 故本研究目的旨在檢驗在總療程次數相同(共 10 次)的情況下，降低稜鏡調適的介入頻 率是否仍可有效改善患者的忽略症狀。方法:本研究使用單一受試研究法，共 3 位具有忽 略症之慢性中風個案參與本研究。個案於每週至醫院接受例行性職能治療的時間內，同時 包含進行 10-15 分鐘的稜鏡調適介入，介入頻率為一週 2 或 3 次，共為期 4 至 7 週。成 效評量包括行為不注意測驗中的三項紙筆測驗和卡氏日常活動量表，分別於介入前、每次 介入後、10 次介入結束後以及介入結束後一個月進行評量。所得數據以視察法和雙標準 差帶法進行分析。結果:研究結果顯示，雖然每位個案在稜鏡調適介入結束後於各項紙筆 測驗的進步情況並不一致，但多呈現正向療效，並同時反映在其卡氏日常活動量表的評量 上，且此正向療效多能維持至介入結束後的一個月。結論:本研究結果初步支持降低稜鏡 調適的介入頻率，但維持一定的介入總次數(如:每週 2-3 次，持續 10 次)，對於慢性 期忽略症患者仍具有正向成效;故建議國內臨床治療師可配合忽略症患者的例行療程進行 稜鏡調適療法，以改善其忽略症狀並促進功能性表現。

Objective: Prism adaptation (PA) is a novel intervention for patients with unilateral neglect (UN) after stroke in recent years. Previous studies have suggested that a total of 10 daily PA treatments can alleviate neglect syndrome. However, not all patients with chronic UN can be treated continually with PA program every day in Taiwan. Therefore, the purpose of this study was to examine the effectiveness of the lower PA frequency on neglect rehabilitation.Methods: In this A-B-A single-subject study, three chronic UN patients following stroke were recruited. In agreement with their routine rehabilitation programs two or three times a week, all patients were additionally treated with 10-15 minutes PA treatment after their occupational therapy for 4 to 7 weeks (a total of 10 sessions), followed by one month of follow- up assessment. Outcome measures included the Star Cancellation Test, the Line Bisection Test, the Picture Scanning test, and Catherine Bergego Scale. A combination of visual analysis and the two-standard-deviation band method was used for data analysis. Results: All patientsshowed signi cant intervention-related improvements on the 3 paper-and-pencil tests and theCatherine Bergego Scale. Moreover, such positive effects were also maintained during the follow-up phase. Conclusion: The ndings suggest that the lower frequency (i.e., 2 or 3 timesper week) of PA program not only can ameliorate chronic UN, but also exhibit the potential to generalize the effects on activities of daily living. Occupational therapists can apply PA to cooperate with routine treatments for alleviating chronic UN and improve their daily functions.