Sleep quality is significantly connected to our emotions, to our mood and also mood disorders (Ben Simon et al., 2020). This master’s thesis explores if and how does one’s sleep quality connect with experiencing and regulating positive and negative emotions. What is more, it explores if this constructs are each other’s predictors, which specific emotions connect most significantly to sleep quality and, on the other hand, which aspects of sleep quality connect most significantly to emotions. Furthermore, this thesis investigates if the regulation of negative emotions is connected to sleep quality more significantly as opposed to when being compared to the regulation of positive emotions. For the purpose of this research, 109 participants filled Slovenian translation of Pittsburgh Sleep Quality Index (Jurjevčič, 2013; PSQI; Buysse et al., 1989), The Positive and Negative Affect Schedule – Expanded form (Modic and Kobal Grum, 2020; PANAS-X; Watson and Clark, 1994), which I retranslated and improved, and the translation of Perth Emotion Regulation Competency Inventory (Makarić, 2020; PERCI; Preece et al., 2018). Results show that we experience more negative emotions – especially hostility, guilt and fatigue – and less positive emotions when the sleep quality is low. There is also a negative correlation between sleep quality and emotion regulation competency, especially regulation of negative emotions. Negative emotions and regulation of negative emotions are in general more significantly correlated to sleep quality than positive emotions, especially with Subjective sleep quality and Daytime dysfunction because of poor sleep quality. Further and more thorough research is needed to explore connections and influences between aforementioned constructs in Slovenian population. Spreading awareness about the topic could benefit us in building a society with more positive and less negative emotions, better emotional regulation and lower prevalence of mood disorders.
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