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Frontiers in Big Data 2020Psychotic symptoms, i.e., hallucinations and delusions, involve gross departures from conscious apprehension of consensual reality; respectively, perceiving and...
Psychotic symptoms, i.e., hallucinations and delusions, involve gross departures from conscious apprehension of consensual reality; respectively, perceiving and believing things that, according to same culture peers, do not obtain. In schizophrenia, those experiences are often related to abnormal sense of control over one's own actions, often expressed as a distorted sense of agency (i.e., passivity symptoms). Cognitive and computational neuroscience have furnished an account of these experiences and beliefs in terms of the brain's generative model of the world, which underwrites inferences to the best explanation of current and future states, in order to behave adaptively. Inference then involves a reliability-based trade off of predictions and prediction errors, and psychotic symptoms may arise as departures from this inference process, either an over- or under-weighting of priors relative to prediction errors. Surprisingly, there is empirical evidence in favor of both positions. Relatedly, there is evidence for both an enhanced and a diminished sense of agency in schizophrenia. How can this be? We argue that there is more than one generative model in the brain, and that ego- and allo-centric models operate in tandem. In brief, ego-centric models implement corollary discharge signals that cancel out the effects of self-generated actions while allo-centric models compare several hypothesis regarding the causes of sensory inputs (including the self among the potential causes). The two parallel hierarchies give rise to different levels of agency, with ego-centric models subserving "feelings of agency" and allo-centric predictions giving rise to "judgements of agency." Those two components are weighted according to their reliability and combined, generating a higher-level "sense of agency." We suggest that in schizophrenia a failure of corollary discharges to suppress self-generated inputs results in the absence of a "feeling of agency" and in a compensatory enhancement of allo-centric priors, which might underlie hallucinations, delusions of control but also, under certain circumstances, the enhancement of "judgments of agency." We discuss the consequences of such a model, and potential courses of action that could lead to its falsification.
PubMed: 33693400
DOI: 10.3389/fdata.2020.00027 -
Human Brain Mapping Mar 2022The Self-Attention Network (SAN) has been proposed to describe the underlying neural mechanism of the self-prioritization effect, yet the roles of the key nodes in the...
The Self-Attention Network (SAN) has been proposed to describe the underlying neural mechanism of the self-prioritization effect, yet the roles of the key nodes in the SAN-the left posterior superior temporal sulcus (LpSTS) and the dorsolateral prefrontal cortex (DLPFC)-still need to be clarified. One hundred and nine participants were randomly assigned into the LpSTS group, the DLPFC group, or the sham group. We used the transcranial magnetic stimulation (TMS) technique to selectively disrupt the functions of the corresponding targeted region, and observed its impacts on self-prioritization effect based on the difference between the performance of the self-matching task before and after the targeted stimulation. We analyzed both model-free performance measures and HDDM-based performance measures for the self-matching task. The results showed that the inhibition of LpSTS could lead to reduced performance in processing self-related stimuli, which establishes a causal role for the LpSTS in self-related processing and provide direct evidence to support the SAN framework. However, the results of the DLPFC group from HDDM analysis were distinct from the results based on response efficiency. Our investigation further the understanding of the differentiated roles of key nodes in the SAN in supporting the self-salience in information processing.
Topics: Adult; Attention; Brain Mapping; Dorsolateral Prefrontal Cortex; Ego; Female; Humans; Male; Nerve Net; Psychomotor Performance; Social Perception; Temporal Lobe; Transcranial Magnetic Stimulation; Young Adult
PubMed: 34826160
DOI: 10.1002/hbm.25730 -
Textual Practice 2022I examine the paradoxical place of narcissism in contemporary culture, and within the work of Freud. Paying close attention to the repeated moments of equivocation and...
I examine the paradoxical place of narcissism in contemporary culture, and within the work of Freud. Paying close attention to the repeated moments of equivocation and contradiction within Freud's descriptions of primary and secondary narcissism, I draw on the work of Jean Laplanche, who suggests that the ambiguities in Freud's texts often mirror ambiguities within the constitution of the ego. I argue that we should read Freud's inability to rigorously distinguish self from other in his explications of self-love not - or not only - as a failure on his part, but also as a trace of an alterity at the heart of identity. It is the very 'failure' of Freud's concept of narcissism that leaves it open to the other and makes it remain a vital concept today, when the word narcissism has been reduced to an impoverished notion of self-obsession. In closing I suggest that, with his knotted and never fully coherent concept of narcissism, Freud provides us with a way of thinking about human relationships outside of the binaries of selfless v selfish love that so commonly constrain our popular and theoretical ideas about love.
PubMed: 35756363
DOI: 10.1080/0950236X.2020.1839956 -
PloS One 2022We study how individuals' effort contribution to a team production task varies depending on whether the task is ego relevant or not. We conduct an experiment to test the...
We study how individuals' effort contribution to a team production task varies depending on whether the task is ego relevant or not. We conduct an experiment to test the effect of ego-relevance when the team production depends on the team's top- or bottom-performer. Ego-relevance is manipulated by calling the Raven IQ Test an "IQ Task" or a "Pattern Task." We find that the effort contributed to the task is affected by ego-relevance and the impact of the team production function on effort contribution is mediated by the teammate's expected effort contribution. Ego-relevance increases the responsiveness to the teammate's expected effort contributions. Similarly, more responsive behavior is noticeable when the team production depends on the bottom-performer. However, we do not observe interaction-effects between ego-relevance and the team production function that affect effort contributions.
Topics: Humans; Ego
PubMed: 36542636
DOI: 10.1371/journal.pone.0279391 -
Scientific Reports Apr 2023In contrast to long-term relationships, far less is known about the temporal evolution of transient relationships, although these constitute a substantial fraction of...
In contrast to long-term relationships, far less is known about the temporal evolution of transient relationships, although these constitute a substantial fraction of people's communication networks. Previous literature suggests that ratings of relationship emotional intensity decay gradually until the relationship ends. Using mobile phone data from three countries (US, UK, and Italy), we demonstrate that the volume of communication between ego and its transient alters does not display such a systematic decay, instead showing a lack of any dominant trends. This means that the communication volume of egos to groups of similar transient alters is stable. We show that alters with longer lifetimes in ego's network receive more calls, with the lifetime of the relationship being predictable from call volume within the first few weeks of first contact. This is observed across all three countries, which include samples of egos at different life stages. The relation between early call volume and lifetime is consistent with the suggestion that individuals initially engage with a new alter so as to evaluate their potential as a tie in terms of homophily.
Topics: Humans; Social Support; Emotions; Ego; Cell Phone; Italy
PubMed: 37059731
DOI: 10.1038/s41598-023-32206-2 -
Brain Sciences Jul 2022Many investigations have been performed on the effects of mental exertion that consumes self-regulatory resources and then affects physical and/or cognitive performance... (Review)
Review
BACKGROUND
Many investigations have been performed on the effects of mental exertion that consumes self-regulatory resources and then affects physical and/or cognitive performance later on. However, the effect of manipulating self-regulation and interventions to attenuate this negative effect remains unclear. Moreover, there is continuous controversy regarding the resource model of self-regulation.
OBJECTIVE
We conducted a systematic review to assess the literature on manipulating self-regulation based on four ingredients (, , , and ) in order to counter mental exertion and improve physical and/or cognitive performance. The results provide more insight into the resource model.
METHOD
A thorough search was conducted to extract the relevant literature from several databases, as well as Google Scholar, and the sources from the references were included as grey literature. A self-regulation intervention compared to a control condition, a physical and/or cognitive task, and a randomised controlled trial were selected.
RESULT
A total of 39 publications were included. Regarding the four components of self-regulation, the interventions could mainly be divided into the following: (i) : implementation intervention; (ii) : biofeedback and time monitoring; (iii) : repeated exercise, mindfulness, nature exposure, and recovery strategies; (iv) : autonomy-supportive and monetary incentives. The majority of the interventions led to significant improvement in subsequent self-regulatory performance. In addition, the resource model of self-regulation and attention-restoration theory were the most frequently used theories and supported relevant interventions.
CONCLUSION
In line with the resource model, manipulating the four components of self-regulation can effectively attenuate the negative influence of mental exertion. The conservation proposed in the strength model of self-regulation was supported in the current findings to explain the role of motivation in the self-regulation process. Future studies can focus on attention as the centre of the metaphorical resource in the model.
PubMed: 35884703
DOI: 10.3390/brainsci12070896 -
Frontiers in Psychology 2022A rich body of research suggests that self-associated stimuli are preferentially processed and therefore responses to such stimuli are typically faster and more...
A rich body of research suggests that self-associated stimuli are preferentially processed and therefore responses to such stimuli are typically faster and more accurate. In addition, people have an understanding of what they consider their "Self" and where it is located, namely near the head and upper torso-further boosting the processing of self-related stimuli if they are presented near the felt location of the self. We were interested in whether the same mechanism can be found when people transfer their "Self" into a static avatar. We investigated this in two studies with = 33 and = 39 young, healthy adults, respectively. Taken together, the results showed that (i) people indeed show enhanced processing for self-avatar-related stimuli and (ii) that self-associations are stronger if the to-be-associated stimuli are closer to the avatar's upper torso-suggesting some kind of a projected location of the self in the avatar. This implies that attention is not equally distributed across the avatar. Beyond a theoretical level, this also has implications for practical use. For example, digital games opting for a non-traditional user interface where information is displayed on or in the direct vicinity of the character should take this effect into account when choosing which information to present where (i.e., present the most crucial piece of information close to the self-center of the avatar).
PubMed: 35874390
DOI: 10.3389/fpsyg.2022.918688 -
Journal of Experimental Child Psychology Apr 2021Did I make that sound? Differentiating whether sensory events are caused by us or the environment is pivotal for our sense of agency. Adults can predict the sensory...
Did I make that sound? Differentiating whether sensory events are caused by us or the environment is pivotal for our sense of agency. Adults can predict the sensory effects of their actions, which results in attenuated processing of self-produced events compared with externally generated events. Yet, little is known about whether young infants predict and discriminate self-produced events from externally produced events. Using electroencephalography (EEG), 3-month-olds' neural response to the same audiovisual stimulus was compared between a Self-produced condition and externally generated conditions with predictable timing (External-Regular) and irregular timing (External-Irregular). We hypothesized that if 3-month-olds predict self-produced events, their event-related potentials should be smallest for the Self-produced condition, strongest for the External-Irregular condition, and in between for the External-Regular condition. Cluster-based permutation tests indicated a more positive deflection (300-470 ms) for irregular stimuli compared with regular stimuli over the vertex. Contrasting the Self-produced and External-Irregular conditions showed a statistical trend within the same time window. Although not fully conclusive, this might suggest the emerging differentiation between self-produced and less predictable external events. However, there was no statistical evidence that infants differentiated self-produced events from temporally predictable external events. Our findings shed light on the emerging sense of agency and suggest that 3-month-olds are transitioning toward predicting and discriminating the consequences of their actions.
Topics: Auditory Perception; Discrimination, Psychological; Ego; Electroencephalography; Evoked Potentials; Female; Humans; Infant; Internal-External Control; Male; Sound; Time Factors
PubMed: 33341016
DOI: 10.1016/j.jecp.2020.105039 -
Frontiers in Psychology 2023Cultural differences in self-construal, human relationships, and values between Western and East Asian people have been suggested. The aim of this article is to...
Cultural differences in self-construal, human relationships, and values between Western and East Asian people have been suggested. The aim of this article is to investigate cultural difference in dreamers' self-construal based on their dreams. We examined the dreams sampled via online questionnaires from 300 non-clinical participants from America and Japan, respectively. The free response for the contents of "impressive dreams in childhood" "recent impressive dreams" was categorized into the five general dream structural patterns. Besides, the participants were asked to answer the scales to investigate participants' cultural self-construal. The current results revealed the prevalence of the independent view of self in American participants and the interdependent view of self in Japanese participants. In addition, we found significant cultural differences in the dream length and structural patterns. For American dreams, the dream-ego had a clear will and strong mobility, and there were obvious ends of dream events. Conversely, for Japanese dreams, the weak agency and vague conscious of the dream-ego were shown, and others could play a main role in one's dreams. These results suggested that each characteristic of the American and Japanese samples may be influenced by the differences in self-construal or in the process of self-formation between American and Japanese cultures.
PubMed: 36874798
DOI: 10.3389/fpsyg.2023.1069406 -
Journal of Psychopharmacology (Oxford,... Jan 2023Ketamine is an N-methyl-d-aspartate antagonist which is increasingly being researched and used as a treatment for depression. In low doses, it can cause a transitory... (Review)
Review
Ketamine is an N-methyl-d-aspartate antagonist which is increasingly being researched and used as a treatment for depression. In low doses, it can cause a transitory modification in consciousness which was classically labelled as 'dissociation'. However, ketamine is also commonly classified as an atypical psychedelic and it has been recently reported that ego dissolution experiences during ketamine administration are associated with greater antidepressant response. Neuroimaging studies have highlighted several similarities between the effects of ketamine and those of serotonergic psychedelics in the brain; however, no unified account has been proposed for ketamine's multi-level effects - from molecular to network and psychological levels. Here, we propose that the fast, albeit transient, antidepressant effects observed after ketamine infusions are mainly driven by its acute modulation of reward circuits and sub-acute increase in neuroplasticity, while its dissociative and psychedelic properties are driven by dose- and context-dependent disruption of large-scale functional networks. Computationally, as nodes of the salience network (SN) represent high-level priors about the body ('minimal' self) and nodes of the default-mode network (DMN) represent the highest-level priors about narrative self-experience ('biographical' self), we propose that transitory SN desegregation and disintegration accounts for ketamine's '' state, while transitory DMN desegregation and disintegration accounts for ketamine's '' state. In psychedelic-assisted psychotherapy, a relaxation of the highest-level beliefs with psychotherapeutic support may allow a revision of pathological self-representation models, for which neuroplasticity plays a permissive role. Our account provides a multi-level rationale for using the psychedelic properties of ketamine to increase its long-term benefits.
Topics: Hallucinogens; Ketamine; Antidepressive Agents; Psychotropic Drugs; Psychotherapy
PubMed: 36527355
DOI: 10.1177/02698811221140011