A yw sganiau fMRI o unigolion sydd wedi'u hyfforddi'n helaeth i ddiddymu'r 'hunan' (megis myfyrwyr Bwdhaidd uwch) yn dangos is-reoleiddio llinell sylfaen barhaol o'r Rhwydwaith Modd Diofyn a Strwythurau Canol-linell Cortigol?

advanced Buddhist meditation anatta non-self Default Mode Network fMRI Brewer

### The Buddhist Position: *Anattā* and *Śūnyatā* In Buddhist philosophy, the conviction that a permanent, autonomous "I" exists is the root cause of clinging and existential suffering (*dukkha*). * **Theravāda** grounds this in the doctrine of *anattā* (not-self). In the *Anattalakkhaṇa Sutta* (SN 22.59), the Buddha deconstructs the conventional self into five constantly shifting psychophysical aggregates (*khandhas*: form, feeling, perception, mental formations, and consciousness), concluding of each: *“This is not mine, this I am not, this is not my self.”* * **Mahāyāna** expands *anattā* into *śūnyatā* (emptiness). In canonical texts such as the *Heart Sūtra* and Nāgārjuna’s *Mūlamadhyamakakārikā*, not only is the person devoid of self-nature (*svabhāva*), but all phenomena are interdependent and empty of inherent existence. An enduring internal tension exists between Madhyamaka’s radical deconstructive emptiness and the *Tathāgatagarbha* (Buddha-nature) tradition, which can rhetorically resemble a luminous ground of being. ### Empirical Convergence: The Default Mode Network Contemporary contemplative neuroscience investigates how prolonged meditation alters the brain’s neural architecture of selfhood. In a landmark fMRI study, **Judson Brewer et al. (PNAS, 2011)** examined experienced meditators (>10,000 practice hours) across Theravāda and Mahāyāna traditions during concentration, loving-kindness, and open awareness meditations. Brewer observed consistent relative deactivation in the primary hubs of the **Default Mode Network (DMN)**—specifically the medial prefrontal cortex (mPFC) and the posterior cingulate cortex (PCC). * **Human terms:** The DMN orchestrates the "narrative self"—the ongoing internal monologue of autobiographical memory, future-oriented planning, self-referential evaluation, and rumination (the "mind-wandering" mode). * Brewer’s cohort also exhibited increased resting-state and task-state functional connectivity between the PCC, dorsal anterior cingulate cortex (dACC), and dorsolateral prefrontal cortex (dlPFC), reflecting enhanced cognitive monitoring and a shift from narrative self-absorption to present-centered sensory processing. ### Epistemic Status Mainstream cognitive neuroscience treats self-experience as an emergent, dynamically constructed model rather than an entity—a functional perspective that structurally resonates with Buddhist process psychology. However, **correlation is not metaphysical proof**. fMRI measures blood-oxygen-level-dependent (BOLD) hemodynamics associated with task de-escalation, not the ontological absence of an underlying substrate. Brewer’s findings substantiate that meditative absorption downregulates self-referential cognitive chatter; equating DMN suppression with the definitive realization of *anattā* or *śūnyatā* remains an interpretive philosophical claim, not an empirical consensus.

• bodhi-path.com
• fabriziomusacchio.com
• reddit.com
• neuromind.fr
• nih.gov
• mindfulnessassociation.net
• researchgate.net
• pnas.org
• ttu.edu

expert meditators baseline default mode network cortical midline structures persistent downregulation resting-state fMRI

### Mainstream Consensus: Neuroscience, Cognitive Science, and Psychiatry In contemporary cognitive neuroscience and clinical psychiatry, functional magnetic resonance imaging (fMRI) has established that spontaneous resting-state cognition is dominated by the **Default Mode Network (DMN)**, particularly its core **cortical midline structures (CMS)**: the medial prefrontal cortex (mPFC) and the posterior cingulate cortex (PCC)/precuneus. Mainstream consensus identifies CMS activity as the neural substrate of stimulus-independent thought, autobiographical memory, and self-referential narrative processing (“mind-wandering” or rumination). Over the past two decades, neuroimaging research on long-term contemplative practitioners (e.g., Theravāda, Zen, and Tibetan Buddhist meditators) has demonstrated that sustained contemplative training induces both **state** alterations (acute shifts during active practice) and persistent **trait** neuroplasticity (enduring baseline changes during non-meditative resting states). #### Landmark Studies and Empirical Evidence - **Brewer et al. (PNAS, 2011)** conducted a landmark study comparing experienced meditators (>10,000 hours) to novices. They revealed that *"the main nodes of the default-mode network (medial prefrontal and posterior cingulate cortices) were relatively deactivated in experienced meditators across all meditation types"*. Crucially, resting-state fMRI demonstrated altered baseline connectivity: expert meditators exhibited enduring co-activation between the PCC and cognitive-control hubs (dorsal anterior cingulate cortex [dACC] and dorsolateral prefrontal cortex [dlPFC]), reflecting continuous, baseline self-monitoring and reduced default narrative processing. - **Taylor et al. (2013)** confirmed that extensive training attenuates functional connectivity between CMS regions implicated in emotional appraisal and self-referential thought during restful states. - **Northoff and Bermpohl (2004)** originally mapped the CMS as the core biological architecture of the self, a framework widely used to contextualize how mindfulness deconstructs rigid self-referential processing. #### Distinctive Concepts - **Cortical Midline Structures (CMS):** The anatomical spine of the narrative self; persistent downregulation diminishes automated self-judgment and past/future ruminative loops. - **State-to-Trait Shift:** The neurobiological transition wherein deliberate attentional stabilization ceases to require conscious effort and becomes the default resting baseline. - **Network Opponency:** Increased anti-correlation between the DMN and the Central Executive Network (CEN) / Dorsal Attention Network (DAN), maintaining present-centered engagement rather than spontaneous task-negative distraction. #### Epistemic Boundaries & Internal Tensions Mainstream neuroscience accepts that meditation downregulates DMN activity and alters resting connectivity. However, rigorous meta-analyses (e.g., Fox et al., 2014, 2016) note significant methodological heterogeneity across the literature. Methodological debates persist over whether "resting-state" differences reflect true structural rewiring or simply the inability of expert practitioners to suspend meditation during scanner baseline periods. Claims alleging permanent neural dissolution of the ego or miraculous psychiatric cures exceed current evidence and remain outside mainstream consensus.

• nih.gov
• mit.edu
• pnas.org
• upmc.fr
• researchgate.net
• mpg.de
• nih.gov
• nih.gov
• biorxiv.org

Christian contemplative prayer apophatic hesychasm neuroimaging default mode network self-transcendence

### Position, Practices, and Internal Tensions Contemplative Christian mysticism posits that communion with God (*theosis* or *unio mystica*) ultimately transcends sensory images and rational discursive intellect. The tradition navigates a foundational tension between **kataphatic theology** (*via positiva*, approaching God through imagery, narrative, and vocal dialogue) and **apophatic theology** (*via negativa*, approaching God by stripping away concepts into silent unknowing). Practitioners cultivate apophatic states through practices such as Eastern Orthodox **Hesychasm** (cultivating inner stillness, *hesychia*, traditionally via the rhythmic Jesus Prayer) and Western Catholic **Centering Prayer**. Both methods involve *kenosis* (self-emptying), wherein the practitioner systematically detaches from internal chatter and transient thoughts to rest wordlessly in the divine presence. ### Primary Texts and Key Figures * **Pseudo-Dionysius the Areopagite** (*The Mystical Theology*, ca. 500 CE): Pioneered Christian apophasis, urging the contemplative to "leave behind both sensible and intellectual activities" to enter the "supra-essential darkness of hidden silence" (1.1). * **Evagrius Ponticus** (*Chapters on Prayer* §66, 4th c.): Defined true contemplative prayer as "the laying aside of thoughts." * **Anonymous English Author** (*The Cloud of Unknowing*, 14th c.): Instructed the practitioner to dismiss conceptual thoughts beneath a "cloud of forgetting" while reaching toward the transcendent ground of being with a "blind stirring of love" (chs. 3–5). ### Empirical Neuroimaging, the DMN, and Self-Transcendence Neuroimaging research demonstrates marked differences between different modes of Christian prayer: * **Attentional and Parietal Modulation:** In single-photon emission computed tomography (SPECT) studies of Franciscan nuns engaged in contemplative Centering Prayer, Andrew Newberg et al. (2003) documented increased regional cerebral blood flow in the prefrontal cortex (reflecting sustained attention) paired with significant hypoperfusion in the superior parietal lobes. Because parietal circuits process spatial orientation and somatic self-boundaries, their functional deactivation offers an empirical correlate for the dissolution of ego borders and the subjective experience of self-transcendence. * **Distributed Networks vs. "God Spots":** Mario Beauregard and Vincent Paquette (2006 fMRI, *Neuroscience Letters*) scanned Carmelite nuns recalling *unio mystica*, identifying a broadly distributed network—including the caudate nucleus, insula, and fronto-parietal regions—refuting localized "God-spot" hypotheses. * **Default Mode Network (DMN) Silencing vs. Social Cognition:** Mainstream cognitive neuroscience shows that conversational, kataphatic prayer engages Theory of Mind (ToM) regions and DMN hubs linked to social cognition (treating God as an external, relational agent; e.g., Schjødt et al., 2009; Haverkamp et al., 2025). Conversely, non-discursive apophatic contemplation attenuates activity within core DMN nodes (posterior cingulate and medial prefrontal cortices), mirroring other advanced meditative states by quieting narrative, self-referential rumination. *Epistemic Note:* Scientific consensus treats these activations and attenuations strictly as neural correlates of altered attention, social cognition, and spatial perception; they delineate human brain function during spiritual practice without validating or invalidating metaphysical claims regarding the presence of God.

• blogspot.com
• metanexus.net
• andrews.edu
• cannelevate.com.au
• mindandlife.org
• nih.gov
• andrewnewberg.com
• anglicanjournal.com
• nih.gov
• eurekalert.org
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• researchgate.net
• youtube.com
• psychologyforsociety.org

samadhi ego-dissolution Default Mode Network posterior cingulate cortex fMRI yoga meditation

### Classical Yoga, Advaita, and the Neurobiology of Ego-Dissolution #### Philosophical Positions and Internal Tensions In both Classical Yoga and Advaita Vedānta, the narrative sense of self is not an immutable core, but a constructed cognitive illusion that generates suffering. However, their metaphysical frameworks diverge: * **Classical Yoga (Dualism):** Anchored in Sāṅkhya metaphysics, Patañjali treats reality as fundamentally split into *puruṣa* (pure, unattached consciousness) and *prakṛti* (nature, mind-matter). Liberation (*kaivalya*, "isolation") requires arresting the movements of the cognitive apparatus (*citta-vṛtti-nirodha*, *Yoga Sūtras* 1.2) to sever consciousness from material entanglement. * **Advaita Vedānta (Non-dualism):** Formulated systematically by Ādi Śaṅkara, Advaita argues that reality is non-dual (*Brahman*). The individual ego is an illusory projection (*adhyāsa*). While Yogic practice prioritizes gradual meditative mastery to suppress mind-fluctuations, Advaita employs *samādhi* alongside scriptural inquiry (*jñāna*) to recognize that the individuated self (*ātman*) was never separate from absolute reality (*brahman*). #### Primary Texts and Distinctive Concepts * ***Ahaṃkāra* (“I-maker”):** The functional faculty within the mind that appropriates external experience into an individualized identity (“I” and “mine”). * ***Asmitā* (“I-am-ness”):** Defined in *Yoga Sūtras* 2.6: *“Egoism (asmitā) is the identification of the power of the Seer with the power of the instrument of seeing.”* It represents the existential misidentification of pure consciousness with mental faculties. * ***Nirvikalpa Samādhi*:** A state of deep absorption free of subject–object division or conceptual activity (*vikalpa*), culminating in the experiential dissolution of the ego. #### Empirical Convergence and Landmark Studies Modern fMRI research investigates these states via the **Default Mode Network (DMN)**—a midline network including the posterior cingulate cortex (PCC) and medial prefrontal cortex (mPFC) associated with self-referential thought, autobiographical memory, and mind-wandering. * In a landmark study, **Brewer et al. (PNAS, 2011)** showed that experienced meditators exhibit marked deactivation in key DMN nodes, particularly the PCC, during various meditative absorption states. * Follow-up neuroimaging by researchers such as Robin Carhart-Harris (2012) further demonstrated that DMN desynchronization and reduced PCC metabolism directly correlate with psychometric measures of "ego-dissolution". #### Epistemic Boundary *Mainstream neuroscience confirms:* Down-regulation of the PCC and DMN correlates reliably with decreased self-referential narrative processing and subjective experiences of ego-attenuation. *Metaphysical boundary:* While cognitive science demonstrates neural correlates of ego-dissolution, interpreting these neurofunctional drops as direct empirical validation of metaphysical states—such as *kaivalya* (liberated spirit) or non-dual *Brahman*—is a philosophical leap rather than established scientific consensus.

• yogastlouis.us
• licentiapoetica.com
• esoteria.site
• wikipedia.org
• naada.ca
• yesvedanta.com
• scribd.com
• nih.gov
• fabriziomusacchio.com
• nih.gov
• squarespace.com
• researchgate.net
• psychedelicsci.com
• magicmushroominstitute.com
• upf.edu

neural correlates of the minimal self narrative self default mode network cortical midline structures Metzinger

### Naturalist Stance and Internal Debates Within analytic philosophy of mind and philosophical naturalism, the "self" is not an immaterial Cartesian soul, but a neurobiologically grounded construct. Naturalists seek to reduce or explain subjective experience through subpersonal cognitive mechanisms and empirical neurobiology. An internal tension divides **illusionists/eliminativists** from **constructive realists**: * *Illusionism*: Exemplified by Thomas Metzinger in *Being No One* (2003), this view argues that ontologically, *"no such things as selves exist in the world: nobody ever had or was a self"*. The self is an ongoing neuro-computational simulation. * *Constructive/Pattern Realism*: Thinkers like Shaun Gallagher (2000) and Georg Northoff acknowledge that while no indivisible core exists, the self is real as an embodied, relational pattern across physical, psychological, and temporal levels. ### Distinctive Concepts * **Minimal Self vs. Narrative Self**: Gallagher (*Trends in Cognitive Sciences*, 2000) formalizes this naturalistic distinction. The *minimal self* is an unreflective, present-centered, embodied consciousness of agency and bodily ownership ("I am moving this hand now"). The *narrative self* is temporally extended, conceptual, and autobiographical—a linguistic identity bridging memories of the past with plans for the future. * **Phenomenal Self-Model (PSM) and Transparency**: In Metzinger’s representationalism, the brain generates an internal model of the organism. Because the cognitive system cannot inspect the lower-level predictive computations generating this model, the model becomes *transparent*: we look straight through the construct, creating the lived illusion that we are an enduring, unified subject. ### Neural Correlates and Empirical Consensus Cognitive neuroscience connects these conceptual distinctions to specific networks: * **Cortical Midline Structures (CMS) and the Default Mode Network (DMN)**: A landmark meta-analysis by Northoff et al. (2006) established that self-referential cognition reliably activates CMS—specifically the medial prefrontal cortex (mPFC), perigenual anterior cingulate cortex (PACC), and posterior cingulate cortex (PCC). These regions overlap heavily with the DMN, which engages during resting-state daydreaming, spontaneous mind-wandering, and narrative autobiographical projection. * **Minimal Self Networks**: Bodily and agentic aspects of the minimal self recruit somatosensory, insular, and premotor areas rather than relying exclusively on the midline hubs of the DMN. **Epistemic Qualification**: While mainstream neuroimaging robustly demonstrates that CMS and DMN mediate reflective and narrative self-evaluation, establishing these circuits as the *unique* or complete causal basis for selfhood remains speculative. Midline structures are also recruited during social cognition, theory of mind, and general semantic processing. Consequently, researchers treat self-processing as an integrated, brain-wide dynamic rather than an isolated functional module.

• nih.gov
• goodreads.com
• ovid.com
• organism.earth
• frontiersin.org
• phantomself.org
• psykholoh.com
• nih.gov
• medium.com
• upf.edu
• squarespace.com
• researchgate.net
• nih.gov
• nih.gov

1 source from the original research is no longer reachable

meditation default mode network resting-state connectivity methodological limitations reverse inference fMRI meta-analysis

Within mainstream cognitive neuroscience, early neuroimaging narratives often claimed that meditation acts as a direct down-regulator for the **default mode network (DMN)**—a set of interconnected midline brain regions including the posterior cingulate cortex (PCC) and medial prefrontal cortex (mPFC)—thereby suppressing mind-wandering and quieting the narrative self. However, contemporary methodological consensus emphasizes strict epistemic restraint, highlighting that early optimism frequently rested on uncorrected statistical liabilities and interpretive fallacies. A primary critique targets **reverse inference**: deducing an unobserved psychological state (such as "egolessness," non-attachment, or reduced rumination) merely from observed hemodynamic deactivation or changes in resting-state functional connectivity (rsFC). As Nicholas Van Dam and colleagues highlighted in their consensus critique *Mind the Hype* (2018), interpretations in contemplative science heavily depend on reverse inference, “a practice that can easily mislead,” because DMN hubs are pleiotropic—recruited not only for self-referential thought, but also during episodic memory retrieval, scene construction, spatial navigation, and semantic evaluation. Methodological evaluations by Richard Davidson and Alfred Kaszniak (2015) and quantitative meta-analyses (Fox et al., 2014, 2016) point to three major structural issues in the literature: 1. **Unconstrained Baselines:** Resting-state fMRI examines spontaneous fluctuations while a subject lies idle. These baselines are highly susceptible to physiological artifacts (e.g., changes in respiration and heart rate), drowsiness, or uncontrolled micro-behaviors rather than genuine contemplative state changes. 2. **Control Deficits and Small Samples:** Many studies rely on underpowered cohorts and passive waitlist controls rather than structurally equivalent active controls, confounding putative neural signatures with expectancy effects, placebo mechanisms, and experimenter bias. 3. **Phenomenological Coarseness:** Disparate traditions and styles (focused attention, open monitoring, and loving-kindness) are frequently grouped into an undifferentiated category of "mindfulness," obscuring divergent neurofunctional patterns. Mainstream neuroscience does not dismiss meditation’s impact; controlled trials and meta-analyses confirm modest changes in internetwork connectivity among the DMN, salience, and frontoparietal control networks. However, consensus views these changes as subtle shifts in attention regulation and executive control—explicitly rejecting speculative assertions that neuroimaging has discovered an empirical off-switch for the ego.

• squarespace.com
• nih.gov
• semanticscholar.org
• mit.edu
• lu.se
• nih.gov
• nih.gov
• biorxiv.org
• harvard.edu

fana self-annihilation Sufi zikr neurobiology brain connectivity neuroimaging

### Position within the Sufi Tradition In Sufism (*tasawwuf*), spiritual ascent culminates in **fana’** (dissolution or annihilation of the ego-self, *nafs*) and subsequent **baqa’** (conscious subsistence or abiding within the Divine presence). Practiced primarily through **dhikr** (repetitive, rhythmic vocal or silent remembrance of Divine names) and **muraqaba** (silent meditative absorption), *fana’* entails shedding subjective volition so only God remains manifest. A central historic tension exists between “intoxicated” Sufism (*sukr*)—exemplified by Mansur al-Hallaj’s ecstatic proclamation *Ana al-Haqq* (“I am the Truth”)—and “sober” Sufism (*sahw*), championed by Junayd of Baghdad and Abu Hamid al-Ghazali. Sober scholars argued that unitive absorption (*fana’*) is an intermediate experiential stage; authentic realization requires returning to moral agency (*baqa’*) in strict conformity with Islamic sacred law (*sharia*). ### Key Primary Texts and Concepts - **Abu al-Qasim al-Qushayri (*Al-Risala al-Qushayriyya*):** Systematized *fana’* as the progressive eradication of blameworthy human traits, defining it as *“the passing away of the servant's awareness of his own actions... through his absorption in the presence of God.”* - **Abu Hamid al-Ghazali (*Mishkat al-Anwar* / *The Niche of Lights*):** Described the state of gnostics who *“see nothing in existence except the One Real... submerged in unity, they become tongue-tied and bewildered.”* - **Ibn ‘Arabi (*Fusus al-Hikam*):** Formulated an ontological framework (*wahdat al-wujud*, Unity of Being), presenting *fana’* not as the destruction of an entity, but as awakening to the fundamental reality that independent creaturely existence is illusory. ### Neurobiological Correlates and Epistemic Status Neuroimaging studies (fMRI and quantitative EEG) examining rhythmic contemplative practices like *dhikr* demonstrate significant functional shifts in brain connectivity: 1. **Default Mode Network (DMN) Downregulation:** Mainstream cognitive neuroscience robustly links subjective "ego dissolution" and reduced self-referential thought to decreased blood oxygenation and connectivity within the DMN—principally the posterior cingulate cortex (PCC) and medial prefrontal cortex (mPFC). 2. **Parietal Boundary Modulation:** Studies pioneered by Andrew Newberg and subsequent neuroimaging of unitive mystical states show decreased metabolic activity in the posterior superior parietal lobules, a region crucial for mapping spatial orientation and distinguishing the physical boundary between "self" and "other". 3. **Electrophysiological Shifts:** EEG investigations during sacred chanting show heightened frontal-midline theta and alpha power, indicating parasympathetic regulation and sustained attention. **Epistemic Distinction:** While mainstream neuroimaging firmly verifies that DMN suppression correlates with the subjective attenuation of narrative ego and bodily boundaries, neuroimaging data gathered *specifically* from advanced Sufi adepts remains scarce and small in sample size. Furthermore, assertions from "neurotheology" that brain networks act as transceivers for divine reality remain philosophical and theological hypotheses, strictly distinct from empirical neuroscientific findings.

• nih.gov
• researchgate.net
• cosmosandhistory.org
• theholyquran.co.in
• researchgate.net
• zenodo.org
• jneurophilosophy.com
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• malque.pub
• usm.my
• researchgate.net
• nih.gov
• jneurophilosophy.com
• medium.com

dissolution of self narrative identity phenomenology versus neuroimaging default mode network

### Tradition Position & Phenomenological Architecture Secular existentialism and absurdism deny that the self possesses an inherent, immutable essence. In *The Transcendence of the Ego* (1936), Jean-Paul Sartre argues against a transcendent "I" residing within consciousness, asserting: *“The ego is neither formally nor materially in consciousness: it is outside, in the world. It is a being of the world, like the ego of another.”* For Sartre, foundational consciousness is pre-reflective and egoless; the reified narrative self (*ego*) arises only through reflective conceptualization, often crystallizing into *bad faith* (*mauvaise foi*) when treated as a fixed identity. Albert Camus echoes this in *The Myth of Sisyphus* (1942), describing the collapse of habit and identity when *“the stage sets collapse”* and the individual is stripped of comforting autobiographical illusions, directly confronting the absurd silence of the world. Contemporary phenomenology formalizes this divide: Shaun Gallagher and Dan Zahavi distinguish between the **minimal (or embodied) self**—the immediate, pre-reflective subjective perspective—and the **narrative self**, the socio-temporal construct sustained through autobiographical memory and linguistic reflection. ### Neuroimaging & the Default Mode Network (DMN) Landmark cognitive neuroscience aligns functionally with this dual-layered model. Marcus Raichle and colleagues (2001) identified the **Default Mode Network (DMN)**—anchored in the medial prefrontal cortex (mPFC) and posterior cingulate cortex (PCC)—which dominates during internally directed, self-referential cognition. Neuroimaging studies show that the narrative self relies critically on functional connectivity across DMN nodes to sustain autobiographical memory retrieval and mental time travel. During drug-induced or meditative ego dissolution, empirical fMRI studies (e.g., Carhart-Harris et al., 2014, 2016) demonstrate marked decreases in DMN integrity and parcellation. Phenomenologically, the dissolution of narrative cohesion does not obliterate basic conscious awareness; rather, it dismantles the reflexive "story of me," laying bare the baseline, non-egological flux. ### Epistemic Honesty and Internal Tensions * **Scientific Consensus:** Peer-reviewed consensus supports the DMN’s causal involvement in autobiographical memory and self-referential thought. However, isolating the DMN as the singular "seat of the ego" remains an empirical oversimplification; minimal selfhood involves distributed sensorimotor, insular, and frontoparietal networks. * **Philosophical Disjunction:** Unlike contemplative or mystical paradigms that interpret self-dissolution as union with a cosmic whole, secular existentialism views it as an encounter with *le néant* (nothingness). Living this tension requires practitioners to abandon deterministic identity, accepting radical freedom and the responsibility to invent meaning without metaphysical guarantees.

• samsara.clinic
• nd.edu
• frontiersin.org
• nih.gov
• iflscience.com
• fabriziomusacchio.com
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• researchgate.net
• etonpsychologist.uk