Microbes in the gastrointestinal tract are under selective pressure to manipulate host eating behavior to increase their fitness, sometimes at the expense of host fitness. Microbes may do this through two potential strategies: (i) generating cravings for foods that they specialize on or foods that suppress their competitors, or (ii) inducing dysphoria until we eat foods that enhance their fitness. We review several potential mechanisms for microbial control over eating behavior including microbial influence on reward and satiety pathways, production of (...) toxins that alter mood, changes to receptors including taste receptors, and hijacking of the vagus nerve, the neural axis between the gut and the brain. We also review the evidence for alternative explanations for cravings and unhealthy eating behavior. Because microbiota are easily manipulatable by prebiotics, probiotics, antibiotics, fecal transplants, and dietary changes, altering our microbiota offers a tractable approach to otherwise intractable problems of obesity and unhealthy eating. (shrink)

Self-control requires intentionally resisting what we most want to do. Yet we do what we most want to do, if we do anything intentionally at that time (The Law of Desire). Therefore, self-control is impossible. So runs a well-studied puzzle. The three standard accounts assume that if a desire is our strongest desire, then it is stronger than all others. But that assumption is false. For we may have desires of equal strength. I describe cases which feature tied desires, self-control, (...) and doing what we most want to do. Following insights from computer science (Buridan’s Principle), equal-strength desires are possible any time we try to decide. My proposal may also be used to bolster all three standard analyses. (shrink)

How is willpower possible? Which desires are relevant to well-being? Despite a surge of interest in both questions, recent philosophical discussions have not connected them. I connect them here. In particular, the puzzle of synchronic self-control says that synchronic self-control requires a contradiction, namely, wanting not to do what we most want to do. Three responses have been developed: Sripada’s divided mind view, Mele’s motivational shift thesis, and Kennett and Smith’s non-actional approach. These responses do not incorporate distinctions from desire-satisfaction (...) theories of well-being. I argue that distinguishing between behavioural desires and genuine-attraction desires disarms one objection to synchronic self-control. Conversely, disarming that objection salvages an axiologically crucial claim in recent versions of desire-satisfaction theory. (shrink)

One of the main obstacles to the realization of intentions for future actions and to the successful pursuit of long-term goals is lack of self-control. But, what does it mean to engage in self-controlled behaviour? On a motivational construal of self-control, self-control involves resisting our competing temptations, impulses, and urges in order to do what we deem to be best. The conflict we face is between our better judgments or intentions and “hot” motivational forces that drive or compel us to (...) act in opposing ways. In contrast, on an executive construal of self-control, the emphasis is not on overcoming temptation, but on overriding or inhibiting “cold” automatically triggered routines and habits that are at odds with what we intend to do. Our general aim in this chapter is to contribute to the development of an overarching theory of self-control by exploring ways in which these two apparently competing frameworks can be reconciled. We propose that self-control is best understood as a hybrid set of skills. We draw on recent work on expert motor skill to highlight important ways in which experts differ from novices in the capacities they deploy and the ways in which they deploy them. We consider analogies (and disanalogies) between the domain of sports expertise and the domain of self-control. We end by considering how such a hybrid approach can help us reconcile a motivational and an executive approach to self-control. (shrink)

Researchers have conducted many studies on the relationship between external rewards and intrinsic motivation. A recent study showed that, compared with delayed rewards, rewards delivered immediately after the experiment enhanced the participants’ intrinsic motivation. However, this study did not rule out the possibility of a misattribution effect of extrinsic motivation. The present research conducted three studies to explore whether immediate rewards actually enhance intrinsic motivation. To rule out the interference of the misattribution effect of extrinsic motivation, according to the different (...) characteristics of extrinsic motivation and intrinsic motivation, Study 1 and Study 2 improved the prior experimental paradigm, and the results indicated that the intrinsic motivation of participants who received extra rewards immediately after completing experimental tasks was stronger than that of participants who received the delayed extra reward. Furthermore, to rule out the potential interference of temporal discounting, Study 3 introduced a new variable—reward magnitude. The results showed that the delivery time of the extra reward had an independent effect on intrinsic motivation and that the immediacy of the extra reward could enhance intrinsic motivation. In all, the three studies strongly demonstrated that immediate external extra rewards could truly enhance intrinsic motivation. (shrink)

Basic to all motile life is a differential approach/avoid response to perceived features of environment. The stages of response are initial reflexive noticing and orienting to the stimulus, preparation, and execution of response. Preparation involves a coordination of many aspects of the organism: muscle tone, posture, breathing, autonomic functions, motivational/emotional state, attentional orientation and expectations. The organism organizes itself in relation to the challenge. We propose to call this the “preparatory set” (PS). We suggest that the concept of the PS (...) can offer a more nuanced and flexible perspective on the stress response than do current theories. We also hypothesize that the mechanisms of bodymind therapeutic and educational systems (BTES) can be understood through the PS framework. We suggest that the BTES, including meditative movement, meditation, somatic education, and the body-oriented psychotherapies, are approaches that use interventions on the PS to remedy stress and trauma. We discuss how the PS can be adaptive or maladaptive, how BTES interventions may restore adaptive PS, and how these concepts offer a broader and more flexible view of the phenomena of stress and trauma. We offer supportive evidence for our hypotheses, and suggest directions for future research. We believe that the PS framework will point to ways of improving the management of stress and trauma, and that it will suggest directions of research into the mechanisms of action of BTES. (shrink)

To study whether Tai Chi practice can improve the brain connectivity of the prefrontal lobe of college students, the positive psychological capital questionnaires and resting EEG signals were acquired from 50 college students including 25 TC practitioners and 25 demographically matched TC healthy controls. The results showed that the score of the positive psychological capital questionnaire of the TC group was significantly higher than that of the control group, and the node degree of the frontal lobe and temporal lobe of (...) both groups was positively correlated with the score of the positive psychological capital questionnaire. In addition, the response time of the TC group under auditory stimulation was significantly shorter than that of the control group, and there was a significant positive correlation between response time and its characteristic path length, and a significant negative correlation with global efficiency. Meanwhile, during the selected range of sparsity, the difference in global network parameters between two groups is significant in the alpha band. Under all single sparsity, the clustering coefficient, global efficiency, and local efficiency of the TC group have a higher trend, while the characteristic path length tended to be shorter. In the analysis of the local characteristics of the resting brain functional network, it was found that the node degree of the frontal lobe and temporal lobe of the TC group was higher, and the difference was significant in some nodes. These results all point to the fact that TC practice has a certain impact on specific brain areas of the brain. (shrink)

While prior research suggests a link between mindfulness and ethical decision-making, most of the evidence for this link is correlational and refers to self-focused ethical behaviors. The paucity of experimental evidence, coupled with a lack of clarity on what mechanisms underlie the effect, limits our understanding of whether and how mindfulness might foster other-focused ethical behaviors. In this research, we hypothesize that state mindfulness might promote other-focused ethical behaviors by increasing resourcefulness, which we define as a perceived state of resource (...) abundance. Across four experimental studies, we report causal evidence for the effects of state mindfulness instantiated through brief mindful meditation exercises on other-focused ethical behaviors, including choice of fair-trade products, charitable giving, and volunteering. Resourcefulness mediates the effects of mindfulness on other-focused ethical behaviors. Our work answers the call for more experimental research on mindfulness and its important implications for ethical decision-making. (shrink)

Balanced time perspective is associated with optimal social functioning and facilitates adaptation to pressure and changes in the environment. Previous studies have found that mindfulness is positively associated with and might promote balanced time perspective. However, the mechanism through which mindfulness affects balanced time perspective remains unexplored. The purpose of the present study was to investigate the mediating role of self-compassion and subjective well-being in the relationship between mindfulness and balanced time perspective. A total of 754 Chinese college students, aged (...) 17–27 years, completed the Chinese versions of the Five-Facet Mindfulness Questionnaire, Self-Compassion Scale, Subjective Well-Being Scale, and Zimbardo Time Perspective Inventory. There were significant positive correlations between mindfulness, self-compassion, subjective well-being, and balanced time perspective. Structural equation modeling indicated that in addition to the direct influence of mindfulness on balanced time perspective, self-compassion and subjective well-being played a partial mediating role. On the basis of these findings, we conclude that mindfulness has an important positive influence on balanced time perspective, and highlight the crucial role of the self-compassion in cultivating an individual's balanced time perspective. Limitations of the present study are also discussed. (shrink)

The resource-based model of self-regulation provides a pessimistic view of self-regulation that people are destined to lose their self-control after having engaged in any act of self-regulation because these acts deplete the limited resource that people need for successful self-regulation. The cognitive control theory, however, offers an alternative explanation and suggests that the depletion effect reflects switch costs between different cognitive control processes recruited to deal with demanding tasks. This account implies that the depletion effect will not occur once people (...) have had the opportunity to adapt to the self-regulatory task initially engaged in. Consistent with this idea, the present study showed that engaging in a demanding task led to performance deficits on a subsequent self-regulatory task only when the initial demanding task was relatively short but not when it was long enough for participants to adapt. Our results were unrelated to self-efficacy, mood, and motivation. (shrink)