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Diushekeeva A, Hidalgo S, Zadra A. Impact of Pre-Sleep Visual Media Exposure on Dreams: A Scoping Review. Brain Sci 2024; 14:662. [PMID: 39061403 PMCID: PMC11274468 DOI: 10.3390/brainsci14070662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/24/2024] [Accepted: 06/24/2024] [Indexed: 07/28/2024] Open
Abstract
A body of experimental research has aimed to investigate processes underlying dream formation by examining the effects of a range of pre-sleep stimuli and events on subsequent dream content. Given its ever-growing presence and salience in people's everyday lives, pre-sleep media consumption stands out as a key variable that could influence people's dreams. We conducted a scoping review to evaluate the experimental evidence of the effects of pre-sleep exposure to visual media on dream content. A systematic search on PubMed, PsycInfo, and Web of Science using terms related to moving visual media and dreams yielded 29 studies meeting the inclusion criteria. Overall, we found modest yet varied effects of pre-sleep exposure to visual media on dream content, with rates of stimulus-related incorporation ranging from 3% to 43% for REM dream reports, 4% to 30% for NREM sleep mentation reports, and between 11% and 35% for home dream reports. Our review highlights the large methodological heterogeneity and gaps across studies, the general difficulty in influencing dream content using pre-sleep exposure to visual media, and suggests promising venues for future research to advance our understanding of how and why digital media may impact people's dreams.
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Affiliation(s)
- Ajar Diushekeeva
- Department of Psychology, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, QC H3C 3J7, Canada;
| | - Santiago Hidalgo
- Department of Art History and Cinematographic Studies, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, QC H3C 3J7, Canada;
| | - Antonio Zadra
- Department of Psychology, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, QC H3C 3J7, Canada;
- Center for Advanced Research in Sleep Medicine, CIUSSS-NÎM—Hôpital du Sacré-Cœur de Montréal, 5400 Gouin Blvd Ouest, Montréal, QC H4J 1C5, Canada
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Abbas NH, Samson DR. Dreaming during the COVID-19 pandemic: Support for the threat simulation function of dreams. Front Psychol 2023; 14:1124772. [PMID: 36814654 PMCID: PMC9939895 DOI: 10.3389/fpsyg.2023.1124772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 01/17/2023] [Indexed: 02/08/2023] Open
Abstract
Evolutionary theories suggest that dreams function as a world simulator of events that maximizes our ability to surmount social and threat-related challenges critical to survivorship and reproduction. Here, in contrast to the incorporation continuity hypothesis, we test the (1) social bias hypothesis, which states that dreams will overrepresent positive social interactions relative to waking life, (2) the mutually exclusive threat bias hypothesis, the idea that dream content will be negative relative to waking life, (3) the strengthening hypothesis, which states that dreams will rehearse more positive interactions with individuals the self is familiar with relative to waking life, and (4) the compensation hypothesis, which states that social contents in dreams increases during periods of social seclusion. Dream (n = 168) and wake (n = 184) reports were collected through a standardized online survey from 24 undergraduate students. Recalls were analyzed using the Social Content Scale. Generalized linear mixed effects models were used, and the following fixed-effects were considered for the study; the number of reports contributed, report state, biological sex, stress, social support, and media exposures. Results showed support for the threat bias hypothesis, we found that dreams were more negative and featured more unfamiliar individuals in contrast to waking life. Additionally, we found partial support for the social bias and the strengthening hypotheses, however no support was shown for the compensation hypothesis. Overall, these results demonstrate support for the threat simulation function of dreams.
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Ma Y, Feng X, Wang D, Zhao X, Yan Z, Bao Y, Zhu R, Sun Q, Deng J, Lu L, Sun H. Adverse Childhood Experiences Are Associated With Adult Dream Content: A Cross-Sectional Survey. Front Psychol 2022; 13:837347. [PMID: 35465536 PMCID: PMC9029163 DOI: 10.3389/fpsyg.2022.837347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundDreams can be affected by recent life events and long-term life experiences. Previous evidence has shown that childhood adverse experiences are associated with sleep quality and dream experiences.ObjectiveThe aim of this study was to explore the relationship between childhood adverse experiences and dream content in adults.Participants and SettingA total of 163 participants without current or past physical or mental disorders aged between 18 and 35 were screened in the hospital. Among them, 120 subjects who completed a dream content record at home and whose anxiety and depression levels and sleep quality were within the normal range were included in the data analysis.MethodsA cross-sectional survey was conducted from June 2017 to December 2019. Dream content for 10 consecutive days was recorded by the participants and coded by the Hall and Van de Castle coding system. Childhood adversity was assessed by the Childhood Trauma Questionnaire (CTQ). In the end, 719 dreams out of 626 nights for 120 participants (44 female) were included in the data analysis, gender differences between groups were analyzed using t-tests or U tests, and Spearman’s partial correlation and multiple linear regression were used to investigate the relationship between childhood trauma and dream content.ResultsChildhood adversity was associated with characters, friendly interactions, and objects in dream content. Regression models of childhood adversity predicting characters and objects in dream content were constructed. There were no gender differences in general demographic data, sleep quality, emotional state, childhood adversity, dream recall frequency, or dream content.ConclusionChildhood adversity is associated with adult dream content.
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Affiliation(s)
- Yundong Ma
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
| | - Xia Feng
- The Second People’s Hospital of Guizhou Province, Guiyang, China
| | - Di Wang
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
- Beijing Changping Hospital of Integrated Chinese and Western Medicine, Beijing, China
| | - Xiaoxia Zhao
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
| | - Zejun Yan
- School of Biomedical Science and Medical Engineering, Beihang University, Beijing, China
| | - Yanping Bao
- National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China
- School of Public Health, Peking University, Beijing, China
| | - Ran Zhu
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
| | - Qiqing Sun
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
| | - Jiahui Deng
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
- *Correspondence: Jiahui Deng,
| | - Lin Lu
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
- National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China
- Peking-Tsinghua Center for Life Sciences and PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, China
- Lin Lu,
| | - Hongqiang Sun
- NHC Key Laboratory of Mental Health (Peking University), Peking University Sixth Hospital, National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University Institute of Mental Health, Beijing, China
- Hongqiang Sun,
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Sikka P, Valli K, Revonsuo A, Tuominen J. The dynamics of affect across the wake-sleep cycle: From waking mind-wandering to night-time dreaming. Conscious Cogn 2021; 94:103189. [PMID: 34419707 DOI: 10.1016/j.concog.2021.103189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 07/20/2021] [Accepted: 08/02/2021] [Indexed: 11/18/2022]
Abstract
Affective experiences occur across the wake-sleep cycle-from active wakefulness to resting wakefulness (i.e., mind-wandering) to sleep (i.e., dreaming). Yet, we know little about the dynamics of affect across these states. We compared the affective ratings of waking, mind-wandering, and dream episodes. Results showed that mind-wandering was more positively valenced than dreaming, and that both mind-wandering and dreaming were more negatively valenced than active wakefulness. We also compared participants' self-ratings of affect with external ratings of affect (i.e., analysis of affect in verbal reports). With self-ratings all episodes were predominated by positive affect. However, the affective valence of reports changed from positively valenced waking reports to affectively balanced mind-wandering reports to negatively valenced dream reports. These findings show that (1) the positivity bias characteristic to waking experiences decreases across the wake-sleep continuum, and (2) conclusions regarding affective experiences depend on whether self-ratings or verbal reports describing these experiences are analysed.
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Affiliation(s)
- Pilleriin Sikka
- Department of Psychology and Speech-Language Pathology, University of Turku, Finland; Turku Brain and Mind Center, University of Turku, Finland; Department of Cognitive Neuroscience and Philosophy, University of Skövde, Sweden.
| | - Katja Valli
- Department of Psychology and Speech-Language Pathology, University of Turku, Finland; Turku Brain and Mind Center, University of Turku, Finland; Department of Cognitive Neuroscience and Philosophy, University of Skövde, Sweden
| | - Antti Revonsuo
- Department of Psychology and Speech-Language Pathology, University of Turku, Finland; Turku Brain and Mind Center, University of Turku, Finland; Department of Cognitive Neuroscience and Philosophy, University of Skövde, Sweden
| | - Jarno Tuominen
- Department of Psychology and Speech-Language Pathology, University of Turku, Finland; Turku Brain and Mind Center, University of Turku, Finland
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