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If Homo floresiensis wasn't a fire-using hunter, its origins could be different than we thought

The present model outlines the mechanisms underlying habitual control of responding and the ways in which habits interface with goals. Habits emerge from the gradual learning of associations between responses and the features of performance contexts that have historically covaried with them (e.g., physical settings, preceding actions). Once a habit is formed, perception of contexts triggers the associated response without a mediating goal. Nonetheless, habits interface with goals. Constraining this interface, habit associations accrue slowly and do not shift appreciably with current goal states or infrequent counterhabitual responses. Given these constraints, goals can (a) direct habits by motivating repetition that leads to habit formation and by promoting exposure to cues that trigger habits, (b) be inferred from habits, and (c) interact with habits in ways that preserve the learned habit associations. Finally, the authors outline the implications of the model for habit change, especially for the self-regulation of habit cuing.

This study tested the idea of habits as a form of goal-directed automatic behavior. Expanding on the idea that habits are mentally represented as associations between goals and actions, it was proposed that goals are capable of activating the habitual action. More specific, when habits are established (e.g., frequent cycling to the university), the very activation of the goal to act (e.g., having to attend lectures at the university) automatically evokes the habitual response (e.g., bicycle). Indeed, it was tested and confirmed that, when behavior is habitual, behavioral responses are activated automatically. In addition, the results of 3 experiments indicated that (a) the automaticity in habits is conditional on the presence of an active goal (cf. goal-dependent automaticity; J. A. Bargh, 1989), supporting the idea that habits are mentally represented as goal-action links, and (b) the formation of implementation intentions (i.e., the creation of a strong mental link between a goal and action) may simulate goal-directed automaticity in habits.

BACKGROUND: On December 12th 2019, a new coronavirus (SARS-Cov2) emerged in Wuhan, China, sparking a pandemic of acute respiratory syndrome in humans (COVID-19). On the 24th of April 2020, the number of COVID-19 deaths in the world, according to the COVID-Case Tracker by Johns Hopkins University, was 195,313, and the number of COVID-19 confirmed cases was 2,783,512. The COVID-19 pandemic represents a massive impact on human health, causing sudden lifestyle changes, through social distancing and isolation at home, with social and economic consequences. Optimizing public health during this pandemic requires not only knowledge from the medical and biological sciences, but also of all human sciences related to lifestyle, social and behavioural studies, including dietary habits and lifestyle. METHODS: Our study aimed to investigate the immediate impact of the COVID-19 pandemic on eating habits and lifestyle changes among the Italian population aged ≥ 12 years. The study comprised a structured questionnaire packet that inquired demographic information (age, gender, place of residence, current employment); anthropometric data (reported weight and height); dietary habits information (adherence to the Mediterranean diet, daily intake of certain foods, food frequency, and number of meals/day); lifestyle habits information (grocery shopping, habit of smoking, sleep quality and physical activity). The survey was conducted from the 5th to the 24th of April 2020. RESULTS: A total of 3533 respondents have been included in the study, aged between 12 and 86 years (76.1% females). The perception of weight gain was observed in 48.6% of the population; 3.3% of smokers decided to quit smoking; a slight increased physical activity has been reported, especially for bodyweight training, in 38.3% of respondents; the population group aged 18-30 years resulted in having a higher adherence to the Mediterranean diet when compared to the younger and the elderly population (p < 0.001; p < 0.001, respectively); 15% of respondents turned to farmers or organic, purchasing fruits and vegetables, especially in the North and Center of Italy, where BMI values were lower. CONCLUSIONS: In this study, we have provided for the first time data on the Italian population lifestyle, eating habits and adherence to the Mediterranean Diet pattern during the COVID-19 lockdown. However, as the COVID-19 pandemic is ongoing, our data need to be confirmed and investigated in future more extensive population studies.

Interventions to change everyday behaviors often attempt to change people's beliefs and intentions. As the authors explain, these interventions are unlikely to be an effective means to change behaviors that people have repeated into habits. Successful habit change interventions involve disrupting the environmental factors that automatically cue habit performance. The authors propose two potential habit change interventions. “Downstream-plus” interventions provide informational input at points when habits are vulnerable to change, such as when people are undergoing naturally occurring changes in performance environments for many everyday actions (e.g., moving households, changing jobs). “Upstream” interventions occur before habit performance and disrupt old environmental cues and establish new ones. Policy interventions can be oriented not only to the change of established habits but also to the acquisition and maintenance of new behaviors through the formation of new habits.

Nature of the sites inhabited-Can live long under water -Nocturnal-Wander about at night-Often lie close to the mouths of their burrows, and are thus destroyed in large numbers by birds-Structure-Do not possess eyes, but can distinguish between light and darkness-Retreat rapidly when brightly illuminated, not by a reflex action-Power of attention -Sensitive to heat and cold -Completely deaf -Sensitive to vibrations and to touch -Feeble power of smell-Taste -Mental qualities -Nature of food-Omnivorous-Digestion -Leaves before being swallowed, moistened with a fluid of the nature of the pancreatic secretion -Extra-stomachal digestion -Calciferous glands, structure of-Calcareous concretions formed in the anterior pair of glands The calcareous matter primarily an excretion, but secondarily serves to neutralise the acids generated during the digestive process.Earth-worms are distributed throughout the world under the form of a few genera, which externally are closely similar to one another.The British species of Lumbricus have never been carefully monographed; but we may judge of their probable number from those inhabiting neighbouring countries.In Scan- dinavia there are eight species, according to Chap.I. SITES INHABITED.9 Eisen ;* but two of these rarely burrow in the ground, and one inhabits very wet places or even lives under the water.We are here concerned only with the kinds whicli bring up earth to the surface in the form of cast- ings.Hoffmeister says that the species in Germany are not well known, but gives the same number as Eisen, together with some strongly marked varieties.fEarth-worms abound in England in many different stations.Their castings may be seen in extraordinary numbers on commons and chalk-downs, so as almost to cover the whole surface, where the soil is poor and the grass short and thin.But they are almost or quite as numerous in some of the London parks, where the grass grows well and the soil appears rich.Even on the same field worms are much more frequent in some places than in others, without any visible difference in the nature of the soil.They abound in paved court-yards close to houses ; and an instance will be given in which they had * 'Bidrag till Skandinaviens Oligochastfauna,' 1871.t 'Die bis jetzt bekannten Arten aus der Familie der Regen- wtirmer,' 1845.HABITS OF WORMS.Chap.I. burrowed through the floor of a very damp cellar.I have seen worms in black peat in a boggy field ; but they are extremely rare, or quite absent in the drier, brown, fibrous peat, which is so much valued by gardeners.On dry, sandy or gravelly tracks, where heath with some gorse, ferns, coarse grass, moss and lichens alone grow, hardly any worms can be found.But in many parts of England, wherever a path crosses a heath, its surface becomes covered with a fine short sward.Whether this change of vegetation is due to the taller plants being killed by the occasional trampling of man and animals, or to the soil being occasionally manured by the droppings from animals, I do not know.*On such grassy paths worm-castings may often be seen.On a heath in Surrey, which was carefully examined, there were only a few castings on these paths, where they were much inclined ; * There is even some reason to believe that pressure is actually favourable to the growth of grasses, for Professor Buckman, who made many observations on their growth in the experimental gardens of the Royal Agricultural College, remarks (' Gardeners' Chronicle,' 1854, p. 619) : " Another circumstance in the cultiva- tion of grasses in the separate form or small patches, is the impossibility of rolling or treading them firmly, withoui which no pasture can continue good."Chap.I.SITES INHABITED.11 but on the more level parts, where a bed of fine earth had been washed down from the steeper parts and had accumulated to a thick- ness of a few inches, worm-castings abounded.These spots seemed to be overstocked wdth worms, so that they had been compelled to spread to a distance of a few feet from the grassy paths, and here their castings had been thrown up among the heath ; but beyond this limit, not a single casting could be found.A layer, though a thin one, of fine earth, which probably long retains some moisture, is in all cases, as I believe, necessary for their existence ; and the mere compression of the soil appears to be in some degree favourable to them, for they often abound in old gravel walks, and in foot-paths across fields.Beneath large trees few castings can be found during certain seasons of the year, and this is apparently due to the moisture having been sucked out of the ground by the innu- merable roots of the trees ; for such places may be seen covered with castings after the heavy autumnal rains.Although most cop- pices and woods support many worms, yet in a forest of tall and ancient beech-trees in Knole 12 HABITS OF WORMS.Chap.I.Park, where the ground beneath was bare of all vegetation, not a single casting could be found over wide spaces, even during the autumn.Nevertheless, castings were abun- dant on some grass-covered glades and in- dentations which penetrated this forest.On the mountains of North Wales and on the Alps, worms, as I have been informed, are in most places rare ; and this may perhaps be due to the close proximity of the subjacent rocks, into which worms cannot .burrow during the winter so as to escape being frozen.Dr. McIntosh, however, found worm-castings at a height of 1500 feet on Schiehallion in Scotland.They are numerous on some hills near Turin at from 2000 to 3000 feet above the sea, and at a great altitude on the Nilgiri Mountains in South India and on the Himalaya.Earth-worms must he considered as terres- trial animals, though they are still in one sense semi-aquatic, like the other members of the great class of annelids to which they belong.M. Perrier found that their ex- posure to the dry air of a room for only a single night was fatal to them.On the Chap.I.NOCTURNAL.13 other hand he kept several large worms alive for nearty four months, completely submerged in water.*During the summer when the ground is dry, they penetrate to a consider- able depth and cease to work, as they do during the winter when the ground is frozen.Worms are nocturnal in their habits, and at night may be seen crawling about in large numbers, but usually with their tails still inserted in their burrows.By the expansion of this part of their bodies, and with the help of the short, slightly reflexed bristles, with which their bodies are armed, they hold so fast that they can seldom be dragged out of the ground without being torn into pieces.fDuring the day they remain in their burrows, except at the pairing season, when those which inhabit adjoining burrows expose the greater part of their bodies for an hour or two in the early morning.Sick * I shall have occasion often to refer to M. Perrier's admirable

The present research investigated the mechanisms guiding habitual behavior, specifically, the stimulus cues that trigger habit performance. When usual contexts for performance change, habits cannot be cued by recurring stimuli, and performance should be disrupted. Thus, the exercising, newspaper reading, and TV watching habits of students transferring to a new university were found to survive the transfer only when aspects of the performance context did not change (e.g., participants continued to read the paper with others). In some cases, the disruption in habits also placed behavior under intentional control so that participants acted on their current intentions. Changes in circumstances also affected the favorability of intentions, but changes in intentions alone could not explain the disruption of habits. Furthermore, regardless of whether contexts changed, nonhabitual behavior was guided by intentions.