| 摘要: | 本研究模擬室內閱讀環境，透過設計不同光譜之照明情境，探討藍光對於使用者的專注力、視覺舒適度之差異影響。研究延續先前實驗室研究團隊的照明人因評估技術，招募受試者進行心理物理學實驗，分析不同情境對受試者的影響，以獲取光譜占比因子對專注表現和視覺舒適度之影響。
本實驗設計六種具有不同藍光強度占比的情境光譜，分兩組實驗進行，在光源參數上，實驗一對色溫以及照度進行約束，實驗二額外增加對光譜分布、Duv、平均演色性指數(Ra)的限制。在實驗量測上，使用NeuroSky腦波儀記錄受試者在照明情境下進行智力測驗、d2-test以及閉眼休息的腦波訊號。後續將數據匯入程式進行分析，當中包含經驗模態分解法(Empirical mode decomposition, EMD)、希爾伯特轉換(Hilbert transform, HT)、機率密度函數(Probability density function, PDF)和接收者操作特徵曲線(Receiver operating characteristic curve, ROC curve)。而實驗的客觀評估指標為智力測驗、d2-test的作答表現，以及接收者操作特徵曲線的曲線下面積(Area under the curve, AUC)，主觀指標則是情境體驗問卷。最終將實驗結果匯入SPSS統計軟體進行變異數分析，觀察情境間是否存在顯著差異，以此探討照明對使用者的影響。
研究結果顯示，受試者在不同照明情境下，兩實驗的腦波狀態與測驗表現皆無顯著差異，在主觀問卷評分上，實驗一在照明亮暗程度、刺眼頻率具有顯著差異，而實驗二則是皆無顯著差異。統整本次實驗的結論，在此實驗設計的藍光占比範圍內，並未觀測到藍光對於專注度提升的顯著效果。
;By simulating indoor lighting environments for reading tasks, this research designs different spectral lighting conditions to explore the visual comfort and concentration effects on users under different proportions of blue light exposure. The experiment inherits the procedures designed in the team previously. Participants are recruited for psychophysical experiments to investigate the impact of this spectrum composition factor on users’ concentration performance, visual fatigue and comfort.
The experiment involves designing six lighting scenarios with different proportions of blue light and conducting two lighting experiments. Experiment one involves a fixed color temperature and illuminance, while experiment two additionally imposes restrictions on spectral distribution, Duv, and average color rendering index (Ra). For measurements, NeuroSky EEG headsets are used to record brainwave signals during IQ test, d2-test, and closed-eye rest activities under the different lighting conditions. The collected data are then analyzed by employing empirical mode decomposition (EMD), Hilbert transform (HT), probability density function (PDF), and receiver operating characteristic curve (ROC curve). The objective indicators include the performance on IQ test, d2-test, and area under the curve (AUC) of the ROC curve, while subjective indicators rely on scores from questionnaires. Finally, the experimental results are imported into the SPSS statistical software for analysis of variance (ANOVA) to investigate if there are significant differences in the indicators between lighting scenarios and to explore the impact of lighting on users.
In terms of objective indicators, there are no significant differences between brainwaves in working and resting states and test performances under different lighting scenarios for both lighting experiments. Regarding subjective indicators, results of questionnaires show significant differences in brightness perception and frequency of glare in experiment one, whereas no significant differences are observed in experiment two. Overall, under the design conditions of this research, there are no significant effects of blue light on enhancing concentration. |
