Mind & Language
January 22, 2026
Adriana Alcaraz-Sánchez
While most research on sleep mentation focuses on dream reports, sleep experiences can also include reports lacking content, such as white dreaming —the feeling of knowing one dreamt but being unable to recall its contents. I claim that white dreaming is a metacognitive feeling, akin to tip‐of‐the‐tongue and déjà experiences. Conceiving it this way allows for a more nuanced understanding of its...
Philosophy and the Mind Sciences
January 7, 2025
Teresa Campillo-Ferrer, Adriana Alcaraz-Sánchez, Susana G. Torres‐platas
The scientific study of lucid sleep, defined as the ability to retain critical self-awareness during ongoing sleep, has traditionally focused on lucid dreaming and induction techniques that specifically target REM sleep. Recently, interest has grown to include other forms of lucid sleep, such as out-of-body experiences, sleep paralysis, and “witnessing-sleep” episodes described in Indian...
Philosophy and the Mind Sciences
December 10, 2024
Adriana Alcaraz-Sánchez
5 citations
I introduce a novel multidimensional framework tailored to investigate a set of phenomena that might appear intractable and render them amenable to scientific inquiry. In particular, I focus on examining altered states of consciousness that appear to the experiencing subject as “contentless” or “objectless” states in some form, either by having disrupted or reduced content of awareness, or...
Neuroscience and Biobehavioral Reviews
August 1, 2024
Teresa Campillo-Ferrer, Adriana Alcaraz-Sánchez, Ema Demšar et al.
14 citations
Out-of-body experiences (OBEs) are characterized by the subjective experience of being located outside the physical body. Little is known about the neurophysiology of spontaneous OBEs, which are often reported by healthy individuals as occurring during states of reduced vigilance, particularly in proximity to or during sleep (sleep-related OBEs). In this paper, we review the current state of...
Review of Philosophy and Psychology
March 1, 2024
Adriana Alcaraz-Sánchez
AbstractRecently, the construct ‘lucid dreamless sleep’ has been proposed to explain the state of ‘clear light’ described by Tibetan Buddhist traditions, a special state of consciousness during deep sleep in which we’re told to be able to recognise the nature or essence of our mind (Padmasambhava & Gyatrul 2008; Ponlop 2006; Wangyal 1998). To explain the sort of awareness experienced during...
Frontiers in Psychology
June 10, 2022
Adriana Alcaraz-Sánchez, Ema Demšar, Teresa Campillo-Ferrer et al.
25 citations
Recent years have seen a heightened focus on the study of minimal forms of awareness during sleep to advance the study of consciousness and understand what makes a state conscious. This focus draws on an increased interest in anecdotical descriptions made by classic Indian philosophical traditions about unusual forms of awareness during sleep. For instance, in the so-called state of...
Phenomenology and the Cognitive Sciences
August 3, 2021
Adriana Alcaraz-Sánchez
21 citations
Abstract This paper presents a pilot study that explores instances of objectless awareness during sleep: conscious experiences had during sleep that prima facie lack an object of awareness. This state of objectless awareness during sleep has been widely described by Indian contemplative traditions and has been characterised as a state of consciousness-as-such; while in it, there is nothing to...