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26 the results matches the hypothesized outcome (means: SAD = 525; Control = 512.36; Blue = 510.51). The average reaction time for participants’ while they were in the SAD condition was higher than the reaction times in both the control and blue light conditions, indicating that in the SAD condition participants found it harder, or were less likely to have their full attention on the task. Standard Deviation of Reaction Times 120 100 80 60 40 20 0 SAD Control Blue Figure 12: Standard Deviation of Reaction Times by Light Condition The figure shows the standard deviation, in milliseconds, of the reaction times collected during the Conjunctive Continuous Performance Task across three different lighting conditions. The lighting conditions included one bright, white light (SAD), one dim, warm light (Control), and one dim, blue light (Blue). The error bars reflect the standard error of the mean. A one-way ANOVA indicated that the standard deviation of reaction times during the CCPT was not significantly different across light condition, F(2,10) = 1.18, p= .33. (means: SAD = 87.1; Control = 86.21; Blue = 72.7). Standard deviation of reaction times indicates the variance in the amount of time it took someone to respond. Large variances in how long it took a person to respond can indicate waxing and waning of attention from trial-to-trial throughout the session. This statistical test found no significant differences between conditions, although numerically it appears that response times varied less in the blue light condition than in the SAD or control condition, potentially indicating a trend Standard Deviation of Reaction Time (ms)PDF Image | The Effects of Lighting Design on Mood, Attention, and Stress
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