The Effects of Lighting Design on Mood, Attention, and Stress

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complete all of their work. More than one participant reported higher levels of stress or indicated that they would be changing their sleep schedule to accommodate their work. Inversely, during spring break students have little to no work, living relatively stress-free. More than one participant scheduled for a session during spring break indicated that they felt incredibly relaxed before the session began because they did not have any pressing deadlines. Participants were also able to maintain more normative sleep schedules. Future follow-up studies, if done in a college setting, would be wise to avoid points in the semester where the majority of participants will likely have uneven workloads across the experimental conditions. 4.2.1 Risk of Unfit Measures It is possible that even if the limitations of this study were addressed and a larger sample size was obtained that the particular measures were inappropriate for assessing the constructs that they were meant to. While it has been proven that the CCPT measures sustained attention, there are many varieties of attention, and it is possible that the type of attention affected by lighting condition is a separate type of attention. For example, it may have been more prudent to examine the participants’ ability to multitask or suppress distracting information instead of their ability to attend to a single task for an extended period of time. The POMS-SF is meant to assess current mood state, but it is possible that the measure was not sensitive enough to detect a more minor change in mood, or that certain subscales of the POMS-SF could have possibly been targeting aspects of mood that were completely unaffected by the lighting conditions. For example, subscales included irrelevant measures for the study, such as “Confusion” and “Anger,” which were not expected to make any change related to lighting condition. Participants also commented that they found some of the adjectives listed in the POMS-SF to be so closely related they were practically synonymous, indicating that the specificity each word was trying to convey could have been lost. Participants were also not always aware of the meaning of the words. Almost every participant asked for the definition of the last item, “Bushed,” because the word is so uncommonly used in current vernacular. If participants had a hard time even knowing what a word meant it is unlikely that the word could be used to 31

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