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Recent evidence from two independent meta-analyses reveals that subjective time is processed in the insular cortex alongside the supplementary motor area (SMA). The insula is suggested to function as the primary sensory interoceptive cortex which receives and processes signals from bodily organs and tissues. In this review, we highlight growing evidence from functional neuroimaging, electrophysiological and psychophysiological studies, as well as from neuropsychological and neuropsychiatric research, which indicate that subjective time judgments are rooted in both bodily and emotional aspects of the self. Highlighting the still underrepresented role of the insula in time perception, we propose that the perception of time passage and the judgment of duration rely on brain regions that support the interaction between the body and the external environment (SMA), as well as the processing of internal signals originating from the body (insula).

Problematic internet use (PIU) has emerged, from the extensive use of the internet, as a concept to describe and understand the more adverse influences of digitalization on people’s experiences. PIU refers to compulsive or excessive internet use leading to psychosocial impairments (among others, anxiety, depression, lesser well-being), and it has been studied from diverse perspectives. However, the mechanisms through which PIU could exert its impact on broader satisfaction with life (SWL) remain unclear. The present work postulates that psychological distress acts as a mediator between PIU and SWL. This hypothesis is tested in large participant groups (N = 7,536), representative of the normative population of six European countries in terms of age and gender. In the context of full structural equation modeling, analyses of direct and indirect effects show evidence for partial mediation of psychological distress between PIU and SWL, with the small positive direct effect of PIU on SWL reversing its valence to moderate and negative via the mediation of psychological distress in all six countries. These findings show that psychological distress is relevant to consider both in trying to define the limits of PIU as a construct and in considering its impacts on SWL in general.

Background: In Floatation-REST (Reduced Environmental Stimulation Therapy), an individual lies on the surface of highly saline water in a dark and silent environment. Prior research on Floatation-REST highlighted its benefits for both physical and mental health in healthy individuals as well as in people with anxiety and stress-related disorders. Methods: A qualitative-empirical approach was employed engaging ten healthy participants, who each completed a 60-minute float session followed by a focused interview on the perception of silence, darkness, and gravity. The data were analysed using qualitative content analysis and MAXQDA software. Results: Silence was largely perceived as pleasant, evoking feelings of security, relaxation, and trust. Silence deepened the awareness of thoughts, emotions, and bodily sensations. Darkness similarly facilitated enhanced introspection and mental-process awareness. Regarding gravity, sensations of weightlessness and the dissolution of body boundaries were associated with mental relaxation, security, and a feeling of lightness. Discussion: Floatation-REST is being employed in studies to induce altered states of consciousness (ASC), as well as in therapeutic contexts to treat mental disorders. Similar to our study, future work could selectively focus on exploring the impact of the three major aspects of the floatation experience we assessed on ASC and therapeutic success.

During affective priming, perception of an emotional “prime stimulus” influences the reaction time to the subsequent emotional “target stimulus”. If prime and target have the same valence (congruent trials), reactions to the target are faster than if prime and target have different valences (incongruent trials). Bem introduced a backward priming paradigm in 2011, where first the target was presented and then the prime after the response. Similar to the classical affective forward priming effects, he found faster reaction times in congruent compared to incongruent trials, and interpreted these results as evidence supporting precognition. In the present exploratory study, while measuring EEG, we combined a forward priming paradigm with a related backward priming paradigm, following Bem’s study. We analysed the EEG data on a group level (ERPs) and on an individual level (single participants, applying artificial neural networks). We found significantly faster reaction times for congruent compared to incongruent trials in the forward priming experiment (p = 0.0004) but no statistically significant differences in the backward priming experiment (p = 0.12). We also found significant differences in ERP amplitude in the forward priming congruent vs incongruent conditions (P8 electrode: p = 0.0002). Backward priming results show weaker, shorter, and less significant differences between congruent and incongruent trials, with maxima at electrodes P7, P3, CP5, and CP1. The neural network results were very variable across participants in both the backward and forward priming and on average, the accuracy results were at chance level for both the forward priming as well as the backward priming. Our results replicate behavioural findings and extend the EEG findings for forward priming. We did not replicate Bem’s backward priming results. These exploratory EEG results are weak, however they give a good starting point for future studies.

Digital devices are marketed as tools to improve efficiency and save time, however their use is also often associated with time pressure, time poverty and reduced wellbeing. Precisely how and why digital technologies reduce the availability of time is largely unknown. This study sought to explore the ways in which people experience a loss of time as a result of digital technology use. Semi-structured interviews were conducted with 300 people from Spain, Poland, Czechia, Germany, Switzerland and the United Kingdom. Thematic analysis of the interview data revealed that digital technology use impacted the way in which time was used, monitored and evaluated. Participants associated digital technology use with a loss of time, a desire to fill all time, a propensity to forget time and, as a result, a desire to gain greater control of time. As a result, the experience of loss of time to digital technology was associated with feelings of guilt, shame and a lack of self-control. The findings suggest that a combination of structural factors, including imperfect algorithm content provision and ease of device use, and attitudinal factors, including the belief that digital time was inauthentic, unintellectual or “bad for you”, lead to the perception of time loss through digital device use. Improvements in algorithmic content generation and greater acceptance of the benefits of time on digital media may help reduce the sense that time is lost to digital technology, and the associated feelings of guilt and loss of control.

In recent years, there has been a renewed interest in the conceptual and empirical study of altered states of consciousness (ASCs), induced pharmacologically or otherwise, driven by their potential clinical applications. To draw attention to the rich history of research in this domain, we review prominent classification schemes that have been proposed to introduce systematicity into the scientific study of ASCs. The reviewed ASC classification schemes fall into three groups according to the criteria they use for categorization: (1) based on the nature, variety, and intensity of subjective experiences (state-based), including conceptual descriptions and psychometric assessments, (2) based on the technique of induction (method-based), and (3) descriptions of neurophysiological mechanisms of ASCs (neuro/physio-based). By comparing and extending existing classification schemes, we can enhance efforts to identify neural correlates of consciousness, particularly when examining mechanisms of ASC induction and the resulting subjective experiences. Furthermore, an overview of what defining ASC characteristics different authors have proposed can inform future research in the conceptualization and quantification of ASC subjective effects, including the identification of those that might be relevant in clinical research. This review concludes by clustering the concepts from the state-based schemes, which are suggested for classifying ASC experiences. The resulting clusters can inspire future approaches to formulate and quantify the core phenomenology of ASC experiences to assist in basic and clinical research.

IntroductionCurrent methods of assessing digital technology use fail to adequately capture a holistic picture of how individuals experience digital technology during daily life. This is because current measures focus on measuring the frequency/duration of specific forms of technology use or problematic use. This research aimed to create two general measures of digital technology use and experience, respectively, which are flexible amid technological changes.MethodsThe measured constructs were specified via bottom-up analysis of an international qualitative study (N=300) on post-covid digital practices. Across three studies we developed and validated the measures using data from 2227 participants.ResultsExploratory and Confirmatory Factor Analyses indicated that the Quality of Digital Experience Scale contains 26 items, measuring individuals’ perceptions and overall experience of digital technology usage and its impact on Well-being, Time and Efficiency, and Social Connectedness. The second scale, the Immersion in Digital Life Scale consists of five separate questions concerning individuals’ estimation of how much digital technology is present in different areas of life.DiscussionThe scales offer reliable measurements of individuals’ interactions with technology in the digital era. Their ability to capture engagement beyond frequency and duration will facilitate greater understanding of the complexities of the positive and negative impacts of digital practices on individuals and societies.

This metascientific project studied the replicability of Bem Experiment 1, which had claimed a precognitive effect, i.e., the ability to successfully guess the outcome of future random events (Bem. J Pers Soc Psychol. 2011;100: 407−25). The use of advanced methodologies—based on the advanced meta-experimental protocol (AMP) and transparent psi project (TPP) procedures—reduced the risk of false discoveries as a function of (i) confirmation bias, (ii) non-transparency, and (iii) intrinsic measurement bias. The combined AMP-TPP test strategy performed three replication studies with a total of 26,483 participants resulting in N = 420,472 critical trials. Study 1 failed to replicate the precognitive effect. An exploratory analysis of Study 1 suggested an effect in the opposite direction than was originally predicted (49.48% ± 0.26 SE; N = 37,836). Study 2 confirmed this exploratory result using a high-powered replication design (49.65% ± 0.14 SE; p = 0.013; N = 127,000). Study 3 was unable to replicate the result from Study 2 (50.07% ± 0.11 SE; p = 0.496; N = 217,800). The results of Study 2 represent a rare example in psi research of the successful replication of an exploratory result using a confirmatory protocol. The source of the one-time confirmed anomalous result in Study 2 remains to be identified. This result presents either (i) a psi-derived anomaly that defies known physical laws, or (ii) a method-derived anomaly, e.g., a false-positive statistical finding. Using conventional standards, based on the lack of replicability in Study 3 and absence of an accepted scientific theory, the second scenario appears more plausible. This AMP-TPP metascientific project demonstrated the use of advanced controls for assessing the reliability of the employed scientific process. This project shows how rigor-enhancing test strategies can improve the reliability, not only of psi research, but any type of weak-effects experiments, including in psychology.

Building on the Stoic notion of self-regulation, we explore philosophical conceptualizations in relation to empirical evidence from psychology and cognitive neuroscience. We challenge the mainstream account that dismisses the possibility of free will based on contemporary scientific findings. Instead, we argue that these findings actually support and refine the Stoic view of free will, particularly in terms of diachronic self-regulation through second-order willed actions over time. Contrary to classical interpretations of Libet-type experiments—which are often cited to refute free will—we contend that such evidence undermines the notion that we are passive recipients of spontaneous desires. Rather, we possess the capacity to regulate our actions proactively by cultivating and exercising deliberate, voluntary intentions. Freedom, in this sense, arises from a meta-cognitive ability or hierarchical, second-order will that can causally influence or override first-order desires or impulsive habits. In essence, our choices are not entirely predetermined by our upbringing or external circumstances; they emerge from our capacity to reflect upon and respond to those influences. Through this process, the self becomes a self-determined free agent.

The term “afterglow” originally described the heightened mood and relaxation following psychedelics and later extended to other altered states. Despite anecdotal reports, little research has explored this effect, especially in Floatation-REST (Reduced Environmental Stimulation Technique). In this method, individuals float in thermoneutral, supersaturated salt water in a dark, quiet tank. Using a crossover design, 34 participants (17 females, 17 males; avg. age 32.2, SD = 8.8) were randomized to 60 min of Floatation-REST or Bed-REST (a control condition on a waterbed). Floatation-REST induced significantly weaker body boundaries, significantly stronger time distortion, and significantly greater relaxation. Post-exposure, participants reported a significantly stronger afterglow, significantly more state mindfulness, and significantly greater interoceptive awareness. Mediation analysis showed relaxation during floating fully explains the afterglow effect. These findings align with psychedelic research, suggesting Floatation-REST elicits similar effects and laying the groundwork for future studies on prolonged afterglow experiences.

The technological advances in recent years are influencing and redefining our daily lives, communications, and social relationships. While these advances bring us many benefits, their negative effects may also cause concern. Although often studied, the potential benefits of digital deprivation are still disputed. This laboratory study investigates the impact of short digital deprivation (7 min and 30 s) on the psychophysiological state and time perception of 90 participants. Three experimental conditions were created for the task performed during the waiting period (30 subjects per condition). Participants had to either freely use their smartphone, perform a non-digital task (sudoku), or wait (i.e. passive digital deprivation). Indicators of electrodermal activity and heart rate variability were calculated for the baseline and waiting periods, along with measures of subjective affective state. Four measures of time perception were also collected after the waiting period. Regardless of their experimental condition, the participants underestimated the duration of the waiting period on average (5 min 44 vs. 7 min 30). Passive digitally deprived participants felt that the time passed more slowly and were more bored than participants engaged in a task, regardless of whether the task was digital or not. Sudoku induced more positive affect and was more cognitively engaging than the free use of a smartphone regarding heart rate variability measures. The results suggest that performing a digital task (free smartphone use) is less cognitively demanding than a non-digital task (sudoku) and alters time perception in the same way. The digital nature of a task might also impact one’s affective reaction. A similar study in the field with longer or repetitive digital deprivation periods and a different non-digital task to perform (e.g., reading news) should be conducted to confirm the results obtained in this study.

Abstract In 1960, a year before Carl Jung’s death, the German parapsychologist Hans Bender met with him to ask his opinion regarding a sequence of strange events that transpired in the previous years. During this meeting, Bender would reveal to Jung the multiple synchronicities that surrounded his mother’s death. In turn, Jung offered his interpretation and elaborated on topics that he had rarely done in the previous years, touching on parapsychological matters, life after death, participation mystique between mother and son, and then nature of time. In this article we elaborate on this discussion by referring to recent conceptualizations and empirical findings regarding death awareness, altered states of consciousness, as well as empirical studies in anomalous cognition, such as precognition and presentiment.

In this proof-of-principle study, we intended to employ the ganzfeld psi method with two novel features. (1) We used a set of four different interactive video games randomly selected for each trial to be played in a virtual reality (VR) setting by the sender, while the receiver was wearing goggles producing either (2) a red or green ganzfeld, randomly selected. N = 48 young couples in a romantic relationship were recruited as sender-receiver pairs, resulting in 48 trials. Regarding the main confirmatory hypothesis, across all trials the experiment registered 15 hits out of 48 attempts, where the chance level lies at 12. According to a binominal test, the probability of having exactly, or more than, 15 hits (K) out of 48 trials (n) is p = .199. The receivers’ hit rates in the green as compared to the red ganzfeld were not significantly different (χ² = .814; p = .367). Assessed experiential state variables for the video game and the ganzfeld sessions as well as the measured trait variable absorption did not affect the hit rate. An analysis of participants’ responses revealed that independent of the hit rate the four games were identified as targets a strongly unequal number of times. The design of potential future studies is discussed.

Meaning in life and nature connectedness are indicators of a healthy life and correlate with health and well-being. We conducted a validation study of German versions of the Meaning in Life Questionnaire (Steger et al. 2006) and Nature Connection Index (Richardson et al. 2019) and assessed mindfulness as a trait and personality (big five personality traits) among participating students (n = 353). Results indicated a significant positive correlation between nature connectedness and presence of meaning in life. Presence of meaning correlated significantly with less neuroticism, more openness to new experiences, greater conscientiousness, and moderately with the two mindfulness subscales, ‘acceptance’ and ‘presence’. Search for meaning was associated with more neuroticism and less acceptance. A higher nature-connectedness score correlated with more presence and acceptance (mindfulness), greater openness, and less neuroticism (personality traits). Furthermore, we introduce a nature-assisted model of meaning fulfilment that can be applied in healthcare practices, counselling, and (psycho-) therapeutic treatment. Our results contribute to growing evidence on the preventive and curative effects of nature connectedness and meaning in life and their role as health-related resources. Nature connectedness and meaning in life are effective resources considering various aspects related to (global) crises such as climate change and the corona pandemic.

In accordance with Bud (A.D.) Craig's theories, we maintain that ascending physiological signals in their temporal dynamics are a necessary prerequisite for human time judgments. Functional neuroimaging and psychophysiological evidence have increasingly demonstrated that the subjective judgment of time is based on the physical and emotional self. The psychological literature reveals how emotions and related body feelings shape subjective time. Empirical studies of altered states of consciousness, namely meditative states, are also of prime interest as the perception of the physical state is strongly modulated and thereby affects the subjective experience of time. Our conclusion is that the sense of time is strongly embodied.

Recent studies suggest that time estimation relies on bodily rhythms and interoceptive signals. We provide the first direct electrophysiological evidence suggesting an association between the brain's processing of heartbeat and duration judgment. We examined heartbeat-evoked potential (HEP) and contingent negative variation (CNV) during an auditory duration-reproduction task and a control reaction-time task spanning 4, 8, and 12 s intervals, in both male and female participants. Interoceptive awareness was assessed with the Self-Awareness Questionnaire (SAQ) and interoceptive accuracy through the heartbeat-counting task (HCT). Results revealed that SAQ scores, but not the HCT, correlated with mean reproduced durations with higher SAQ scores associating with longer and more accurate duration reproductions. Notably, the HEP amplitude changes during the encoding phase of the timing task, particularly within 130-270 ms (HEP1) and 470-520 ms (HEP2) after the R-peak, demonstrated interval-specific modulations that did not emerge in the control task. A significant ramp-like increase in HEP2 amplitudes occurred during the duration-encoding phase of the timing but not during the control task. This increase within the reproduction phase of the timing task correlated significantly with the reproduced durations for the 8 s and the 4 s intervals. The larger the increase in HEP2, the greater the under-reproduction of the estimated duration. CNV components during the encoding phase of the timing task were more negative than those in the reaction-time task, suggesting greater executive resources orientation toward time. We conclude that interoceptive awareness (SAQ) and cortical responses to heartbeats (HEP) predict duration reproductions, emphasizing the embodied nature of time.

Floatation-REST (Reduced Environmental Stimulation Therapy) minimizes stimulation of the nervous system by immersing subjects in an environment without sound or light while they effortlessly float in thermoneutral water supersaturated with Epsom salt. Here we investigated the relationship between altered states of consciousness (ASC) and its association with the affective changes induced by Floatation-REST. Using a within-subject crossover design, 50 healthy subjects were randomized to 60 min of Floatation-REST or 60 min of Bed-REST (an active control condition that entailed lying supine on a warm waterbed in a dark and quiet room). Following Floatation-REST, subjects felt significantly more relaxed, less anxious, and less tired than after Bed-REST. Floatation-REST also induced significantly more pronounced ASC characterized by the dissolution of body boundaries and the distortion of subjective time. The loss of body boundaries mediated the loss of anxiety, revealing a novel mechanism by which Floatation-REST exerts its anxiolytic effect.

INTRODUCTION: We tested and validated the German version of a new instrument for measuring "wakefulness," defined as "an expansive, higher-functioning, and stable state of being in which a person's vision of and relationship to the world are transformed, along with their subjective experience, their sense of identity and their conceptual outlook" (Taylor, 2017, p. 22). METHODS: In order to test the construct validity of the new instrument (Inventory of Secular/Spiritual Wakefulness; WAKE-16), we performed a parametric comparison between a group of expert meditators (n=36) with a history of predominantly meditating in silence and demographically matched non-meditators (n=36) for the WAKE-16 and two conceptually related questionnaires of mindfulness and emotion regulation. RESULTS: Significantly higher scores for the meditators on the WAKE-16 indicate construct validity of the new instrument. Meditators scored higher on the two mindfulness subscales "presence" and "acceptance," as well as on the SEE subscales of emotion regulation and body-related symbolization of emotions. Within the group of meditators, there were significant correlations between wakefulness and mindfulness, accepting one's own emotions, and experiencing overwhelming emotions. The only significant correlation in non-meditators was found between wakefulness and accepting one's own emotions. DISCUSSION: The new instrument shows construct validity by discriminating between the two groups. Correlations between wakefulness and related psychological constructs indicate convergent validity. Future studies could attempt to increase discriminatory accuracy of the definition of wakefulness, as well as finding objective methods of measuring.

Most interval timing research has focused on prospective timing tasks, in which participants are explicitly asked to pay attention to time as they are tested over multiple trials. Our current understanding of interval timing primarily relies on prospective timing. However, most real-life temporal judgments are made without knowing beforehand that the durations of events will need to be estimated (i.e., retrospective timing). The current study investigated the retrospective timing performance of ~24,500 participants with a wide range of intervals (5-90 min). Participants were asked to judge how long it took them to complete a set of questionnaires that were filled out at the participants' own pace. Participants overestimated and underestimated durations shorter and longer than 15 min, respectively. They were most accurate at estimating 15-min long events. The between-subject variability in duration estimates decreased exponentially as a function of time, reaching the lower asymptote after 30 min. Finally, a considerable proportion of participants exhibited whole number bias by rounding their duration estimates to the multiples of 5 min. Our results provide evidence for systematic biases in retrospective temporal judgments, and show that variability in retrospective timing is relatively higher for shorter durations (e.g., < 30 min). The primary findings gathered from our dataset were replicated based on the secondary analyses of another dataset (Blursday). The current study constitutes the most comprehensive study of retrospective timing regarding the range of durations and sample size tested.