This study examined the psychological and physiological differences of thermal adaptability of people used to air-conditioned environments and naturally ventilated environments. The results suggested that long-term exposure to stable air-conditioned environments may weaken people's thermal adaptability. Therefore, it might be advantageous for people to spend less time in static air-conditioned environments; this is not only because of its possible deleterious impact on people's physiological adaptability, but also because the air-conditioners' high-energy consumption will contribute to the effects of global warming.

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This study investigated whether focusing on an intrusive thought before sleeping led to an increased likelihood of dreaming of the thought. A total of 150 participants were randomly assigned to three different kinds of conditions: an expression condition (focus on an intrusive thought for 5 min before sleeping), a suppression condition (suppress an intrusive thought for 5 min before sleeping), and a control condition (think about anything for 5 min before sleeping). Also, they completed a dream diary upon waking. Of them, 126 participants provide valid data for further analysis (40 from the expression condition, 43 from the suppression condition, and 43 from the control condition). The correlation between intrusive thoughts and dream content was rated by participants (self-rating) and two independent judges (external rating). The external rating showed that both a presleep suppression of an intrusive thought and a presleep focusing on an intrusive thought increased the possibility of dreaming of content related to the thought. These results may support the current-concern theory of dreaming, and they may, to some degree, support Carl Jung's compensation theory of dreaming.