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191.
Brent McFerran Darren W. Dahl Gavan J. Fitzsimons Andrea C. Morales 《Journal of Consumer Psychology》2010,20(2):146-151
This paper investigates how people's food choices can be shaped by the body type of others around them. Using a professionally constructed obesity prosthesis, we show that the body type of a (confederate) server in a taste test study was sufficient to alter both the quantity (Experiment 1) and specific choices (Experiment 2) participants made but that chronic dieters and non-dieters exhibited opposite effects. While non-dieters ate more snacks when the server was thin, dieters ate more when the server was heavy. Dieters were also more persuaded by a heavy (vs. a thin) server, choosing both a healthy and unhealthy snack more often when she recommended it to them. We suggest these results may be attributable to identification with the server. 相似文献
192.
Abstract— Currently, children are developing in an obesity-promoting, or obesogenic, environment, which has emerged within the past 3 decades. This rapid change provides a rare opportunity to investigate the phenotypic outcomes that result from the expression of human genetic predispositions in a new environment. Unfortunately, the environmental changes that have occurred are associated with epidemic obesity rates in all age groups. Using a developmental perspective, this article argues that this probabilistic outcome is not predetermined, however. The article also provides examples of learning paradigms—familiarization and associative and observational learning—that present opportunities for parents and caregivers to restructure children’s environments in early life, increasing the likelihood of healthy weight-status outcomes in the context of the current obesogenic environment. 相似文献
193.
Lilianne Nyberg Lisbeth Henricsson Ann‐Margret Rydell 《Infant and child development》2008,17(6):639-656
The principal aim of the present study was to obtain a deeper understanding than hitherto of the concurrent correlates and prospective predictors of loneliness and poor peer acceptance, both falling under the umbrella term low social inclusion. Problematic and socially competent behaviours were investigated as possible predictors of low social inclusion in grade 6, as defined by self‐rated loneliness and degree of peer non‐acceptance, respectively. In grade 6 808 children participated whereof 323 were followed longitudinally from first grade. Loneliness in grade 6 was distinctively associated with high levels of internalizing problems, concurrently as well as prospectively. Peer acceptance, on the other hand, emerged as a complex, multifaceted aspect, with concurrent, independent predictions from both externalizing and internalizing problem behaviours as well as social competence, although prospective analyses found early externalizing problems to be the strongest predictor of peer acceptance. Moderating effects of social competence were sparse, although peer nominated social competence buffered peer acceptance for children with high levels of aggression in the concurrent analyses and social competence boosted peer acceptance for children with low problem levels in the predictive analyses. Social competence did not appear to buffer the negative impact of early problem behaviours on peer relations. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
194.
Positive- and negative-reinforcement-based procedures typically have targeted acceptance for children with severe food refusal; however, these procedures do not always result in successful swallowing. Once acceptance is achieved, some children expel the food repeatedly or pack (hold or pocket) it in their mouths for extended periods of time. This study evaluated the effects of using food redistribution with a bristled massaging toothbrush to reduce packing and increase consumption in 4 children with severe feeding disorders. Packing was reduced for all children. In addition, latency to clean mouth (the duration of time from acceptance to food no longer being present in the child's mouth in the absence of expulsion) for 2 children decreased when the food-redistribution procedure was used. Results are discussed in terms of the potential operant functions of the food-redistribution procedure. 相似文献
195.
PATRICIA COTTI 《The International journal of psycho-analysis》2007,88(1):167-182
The interpretation of dreams was the fi rst text in which Freud referred to the system of two drives (drive of self‐preservation and the sexual drive). In order to understand how this question was at work in Freud's mind, one has to go back to 1898, when Freud began to write the third chapter of The interpretation of dreams. One can then see, in contrast with Sulloway's assertions, how Freud was inspired by Schiller, whose shadow haunted his dreams between April and December 1898. The analysis of these dreams emphasizes how the references to Schiller's works and to the drive of self‐preservation cover sexual impulses, in particular, those connected with the relationship to the father. The food drive or drive of self‐preservation also enabled Freud to construct a heroic romance. He was thereby able to bury an internal criticism which was at odds with his persistence in describing the father as a seducer, and to conceal scenes in which he was defeated and sexually subdued by another boy. 相似文献
196.
Escape (termination of a meal) and token-based differential reinforcement of alternative behavior were used as reinforcement to increase acceptance of food. Using a changing criterion design, the number of bites accepted and consumed was gradually increased to 15 bites per meal. These data suggest that, in some cases, escape may be a potent reinforcer for food acceptance. 相似文献
197.
This study evaluated the effects of a parent-conducted functional analysis and treatment consisting of differential reinforcement of an alternative behavior, escape extinction, and demand fading on food selectivity in a young child with autism. Increases in food acceptance at home and in a restaurant were obtained. 相似文献
198.
Eating rats dodge conspecifics, who are trying to steal their food, by making a somewhat stereotyped 180° turn and step movement to block the robber's approach. This experiment examined the effect of food features on the form and vigor of the dodging movement. Dodge probability and its amplitude were measured as a function of food size, elapsed eating time, food hardness, and the way in which food theft was attempted. Under all conditions dodge probability and its amplitude were directly related to the time necessary to complete eating. Thus, rats estimated the time required to complete eating and adjusted the size of their evasive movements to gain this time. The results show that although dodging has the appearance of a fixed-action pattern, it is influenced by cognitive processes that may be similar to those that direct other aspects of foraging behavior. © 1994 Wiley-Liss, Inc. 相似文献
199.
Three pigeons pecked keys for food reinforcers in a laboratory analogue of foraging in patches. Half the patches contained food (were prey patches). In prey patches, pecks to one key occasionally produced a reinforcer, followed by a fixed travel time and then the start of a new patch. Pecks to another key were exit responses, and immediately produced travel time and then a new patch. Travel time was varied from 0.25 to 16 s at each of three session durations: 1, 4, and 23.5 hr. This part of the experiment arranged a closed economy, in that the only source of food was reinforcers obtained in prey patches. In another part, food deprivation was manipulated by varying postsession feeding so as to maintain the subjects' body weights at percentages ranging from 85% to 95% of their ad lib weights, in 1-hr sessions with a travel time of 12 s. This was an open economy. Patch residence time, defined as the time between the start of a patch and an exit response, increased with increasing travel time, and consistently exceeded times predicted by an optimal foraging model, supporting previously published results. However, residence times also increased with increasing session duration and, in longer sessions, consistently exceeded previously reported residence times in comparable open-economy conditions. Residence times were not systematically affected by deprivation levels. In sum, the results show that the long residence times obtained in long closed-economy sessions should probably be attributed to session duration rather than to economy or deprivation. This conclusion is hard to reconcile with previous interpretations of longer-than-optimal residence times but is consistent with, in economic terms, a predicted shift in consumption towards a preferred commodity when income is increased. 相似文献
200.
Small deviations from bilateral symmetry (fluctuating asymmetries) are cues to fitness differences in some animals. Therefore, researchers have considered whether animals use these small asymmetries as visual cues to determine appropriate behavioral responses (e.g., mate preferences). However, there have been few systematic studies of animals' abilities to visually discriminate such minor asymmetries. If the asymmetries cannot be discriminated, fluctuating asymmetry can not be a visual cue. Here, we report an investigation of European starlings' (Sturnus vulgaris) abilities to discriminate small size asymmetries. We trained starlings, through operant conditioning in a free-flight aviary, to discriminate achromatic, symmetric paired stimuli from size-matched asymmetric stimuli. By starting the learning process with a large asymmetry and progressing through sequential trials of decreasing asymmetry, we elucidated a behavioral limit to asymmetry discrimination. We found that starlings are capable of discriminating a 10% size asymmetry. There was weaker evidence for discrimination of 5% asymmetry but no evidence for signal discrimination at 2.5% size asymmetry. This level of asymmetry discrimination suggests that many size asymmetry cues in nature can be discriminated by birds. At each level of asymmetry discrimination, we also tested whether starlings could generalize their learned symmetry preference to unreinforced novel images. Consistent with previous findings, we found that starlings could generalize their symmetry preferences. 相似文献