Abstract：
:Do young children understand the numerical value of empty sets prior to developing a concept of symbolic zero? Are empty sets represented as mental magnitudes? In order to investigate these questions, we tested 4-year old children and adults with a numerical ordering task in which the goal was to select two stimuli in ascending numerical order with occasional empty set stimuli. Both children and adults showed distance effects for empty sets. Children who were unable to order the symbol zero (e.g., 0<1), but who successfully ordered countable integers (e.g., 2<4) nevertheless showed distance effects with empty sets. These results suggest that empty sets are represented on the same numerical continuum as non-empty sets and that children represent empty sets numerically prior to understanding symbolic zero.
journal_name
Behav Processesjournal_title
Behavioural processesauthors
Merritt DJ,Brannon EMdoi
10.1016/j.beproc.2012.11.001subject
Has Abstractpub_date
2013-02-01 00:00:00pages
91-7eissn
0376-6357issn
1872-8308pii
S0376-6357(12)00236-7journal_volume
93pub_type
杂志文章abstract：:Sensitivity to time was investigated to test the linear-timing hypothesis. A long duration was adjusted until accuracy was 75% correct for a short duration in a two-choice procedure. Short durations (2, 4, 6, 8, 10, 12, 14, 16 and 18 s) were selected from previous research that suggests that sensitivity to time is non...
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abstract：:During foraging, thousands of leaf-cutting ant workers travel along high traffic foraging trails which, when narrow, reduce the leaf delivery rate due to the reduction in workers' travel-speed. On the other hand, high worker traffic promotes head-on encounters which are supposed to mediate worker task allocation and s...
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abstract：:The purpose of the present study was to test the prediction that when two rewards, a smaller but "socially closer" one and a larger but "socially more distant" one, are moved away from the subject by the same social distance, subjective value of the socially more distant reward will increase (i.e. the rate of social d...
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更新日期：2015-06-01 00:00:00
abstract：:Animals that are potential prey do not respond equally to direct and indirect cues related to risk of predation. Based on differential responses to cues, three hypotheses have been proposed to explain spatial variation in vigilance behavior. The predator-vigilance hypothesis proposes that prey increase vigilance where...
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pub_type： 杂志文章,评审
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更新日期：2012-05-01 00:00:00
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journal_title：Behavioural processes
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journal_title：Behavioural processes
pub_type： 杂志文章
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journal_title：Behavioural processes
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更新日期：2002-04-28 00:00:00
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journal_title：Behavioural processes
pub_type： 杂志文章
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更新日期：2019-11-01 00:00:00
abstract：:Norway rat subjects were exposed for either 3 or 10 days to conspecific demonstrators eating a cinnamon-flavoured, protein-deficient diet. While in contact with their demonstrators, and for several days thereafter, subjects were offered a choice between the cinnamon-flavoured, protein-deficient diet that their demonst...
journal_title：Behavioural processes
pub_type： 杂志文章
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更新日期：1995-09-01 00:00:00
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journal_title：Behavioural processes
pub_type： 杂志文章
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更新日期：1988-08-01 00:00:00
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journal_title：Behavioural processes
pub_type： 杂志文章
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更新日期：1985-08-01 00:00:00
abstract：:Previous research in our laboratory has demonstrated that chimpanzees can delay gratification by inhibiting consumption of available food items for as long as 3 min as an experimenter transfers additional food items from a transparent container to a bowl placed in front of the subject. In this study, we examined the i...
journal_title：Behavioural processes
pub_type： 杂志文章
doi：10.1016/j.beproc.2006.07.005
更新日期：2006-11-01 00:00:00
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journal_title：Behavioural processes
pub_type： 杂志文章
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更新日期：2018-01-01 00:00:00
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journal_title：Behavioural processes
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更新日期：1993-10-01 00:00:00
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journal_title：Behavioural processes
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journal_title：Behavioural processes
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abstract：:Variation of reproductive success, an important determinant of the opportunity for sexual selection, is an outcome of competition within one sex for mating with members of the other sex. In promiscuous species, males typically compete for access to females, and their reproductive strategies are strongly related to the...
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journal_title：Behavioural processes
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abstract：:Voluntary exercise by rats running in a freely rotating wheel (free wheel) produces conditioned taste avoidance (CTA) of a flavored solution consumed before running [e.g., Lett, B.T., Grant, V.L., 1996. Wheel running induces conditioned taste aversion in rats trained while hungry and thirsty. Physiol. Behav. 59, 699-7...
journal_title：Behavioural processes
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更新日期：2007-03-01 00:00:00
abstract：:Given that many behavior patterns cluster together in sequences that are organized to solve specific problems (e.g., foraging), a fruitful perspective within which to study behaviors is as distinct 'behavior systems'. Unlike many behavior systems that are widespread (e.g., anti-predator behavior, foraging, reproductio...
journal_title：Behavioural processes
pub_type： 杂志文章,评审
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更新日期：2019-03-01 00:00:00
abstract：:Laying hens oiled the plumage twice a day, while oiling behaviour consisted of a bout of five oilings (median value). During one oiling, a hen collected lipids from the preen gland with her bill and subsequently performed (as a median) five strokes or rubs over and through the feathers. The breast was oiled most, wher...
journal_title：Behavioural processes
pub_type： 杂志文章
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更新日期：1991-07-01 00:00:00
