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KMID : 1151920190010020069
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Chronobiology in Medicine
2019 Volume.1 No. 2 p.69 ~ p.73
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Sleep-Related Attentional Bias to Word Stimuli in Patients with Insomnia Disorder
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Kim Soo-Hyun
Oh Seong-Min
Jeon Jeong-Eun
Lee Ha-Young
Park In-Kyung
Park Ju-Hyun
Lee Mi-Hyun
Lee Yu-Jin
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Abstract
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Objective: This study investigated sleep-related attentional bias toward word stimuli in patients with insomnia. In addition, by diversifying the word stimuli, we investigated bias towards various words by insomnia patients.
Methods: A total of 24 insomnia patients based on the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5) criteria and 21 healthy controls were enrolled. Two types of words, including 39 sleep-related and 40 neutral words, were used as experimental stimuli. In the subjective emotional rating task, all participants were asked to rate the emotional intensity of each word on a 7-point Likert scale (-3=most negative and +3=most positive). Subsequently, participants were asked to indicate whether each word stimulus was associated with sleep.
Results: There were no significant differences in self-rated valence on the types of words between groups. However, there were significant differences in the ratio of ‘sleep-relatedness’ responses and whether each stimulus was associated with sleep in the neutral category (p<0.05). Insomnia patients responded to neutral stimuli as sleep-related more frequently than the control group.
Conclusion: Our results support a sleep-related attentional bias towards neutral stimuli among insomnia patients. This interpretive bias may contribute to the underlying mechanism of chronic insomnia.
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KEYWORD
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Insomnia, Sleep-related attentional bias, Interpretive bias, Word stimulus
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