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1.
    
In the last years, several researchers measured different recognition rates with different artificial neural network (ANN) techniques on public data sets in the human activity recognition (HAR) problem. However an overall investigation does not exist in the literature and the efficiency of complex and deeper ANNs over shallow networks is not clear. The purpose of this paper is to investigate the recognition rate and time requirement of different kinds of ANN approaches in HAR. This work examines the performance of shallow ANN architectures with different hyper-parameters, ANN ensembles, binary ANN classifier groups, and convolutional neural networks on two public databases. Although the popularity of binary classifiers, classifier ensembles and deep learning have been significantly increasing, this study shows that shallow ANNs with appropriate hyper-parameters in combination with extracted features can reach similar or higher recognition rate in less time than other artificial neural network methods in HAR. With a well-tuned ANN we outperformed all previous results on two public databases. Consequently, instead of the more complex ANN techniques, the usage of simple ANN with two or three layers can be an appropriate choice for activity recognition.  相似文献   

2.
张积家  刘红艳 《心理学报》2009,41(7):580-593
个体量词是汉语的特色词类,是名词的限定词。关于个体量词的通达,目前主要有两种假说:直接选择假说和间接选择假说。实验1和实验2采用图词干扰范式考察了名词短语和简单名词产生中个体量词的通达。实验3采用启动范式考察了言语理解中个体量词的通达。结果表明,无论是在言语产生中,还是在言语理解中,都存在量词一致性效应:当启动词和目标词量词一致时反应时短,错误率亦低。整个研究表明,个体量词的通达涉及个体名词系统和个体量词系统,涉及双向选择的组合网络。个体量词的通达是直接选择和间接选择的有机结合。个体量词在名词短语产生的早期就得到了通达。  相似文献   

3.
Verbal labels have been shown to help preverbal infants’ performance on various cognitive tasks, such as categorization. Redundant labels also aid adults’ visual working memory (WM), but it is not known if this linguistic benefit extends to preverbal infants’ WM. In two eye-tracking studies, we tested whether 8- and 10-month-old infants’ WM performance would improve with the presence of redundant labels in a Delayed Match Retrieval (DMR) paradigm that tested infants’ WM for object-location bindings. Findings demonstrated that infants at both ages were unable to remember two object-location bindings when co-presented with labels at encoding. Moreover, infants who encoded the object-location bindings with labels were not significantly better than those who did so in silence. These findings are discussed in the context of label advantages in cognition and auditory dominance.  相似文献   

4.
    
Whereas most experimental studies of public goods provisioning require that all players make their decisions simultaneously, in most organizational settings contribution decisions are made in real time. To account for this aspect of the decision process, we introduce a real-time protocol of play in which, at any point in time, players can either withhold or contribute their entire endowment to a step-level public good. Once contributed, the individual endowments—that in the present experiment differ from one group member to another—cannot be withdrawn. Our results show that contribution levels under the real-time protocol with irrevocable commitments significantly exceed those observed in previous studies under the more common simultaneous protocol of play, thereby considerably reducing social loafing (free riding). Consistent with our equilibrium analysis, over multiple iterations of the game play converges to an equilibrium set of players who maximize the sum of their individual benefit-to-contribution ratios.  相似文献   

5.
    
In this paper a novel method based on facial skin aging features and Artificial Neural Network (ANN) is proposed to classify the human face images into four age groups. The facial skin aging features are extracted by using Local Gabor Binary Pattern Histogram (LGBPH) and wrinkle analysis. The ANN classifier is designed by using two layer feedforward backpropagation neural networks. The proposed age classification framework is trained and tested with face images from PAL face database and shown considerable improvement in the age classification accuracy up to 94.17% and 93.75% for male and female respectively.  相似文献   

6.
Thirty-four elementary school teachers and 32 education students from Canada rated their reactions towards vignettes describing children who met attention-deficit/hyperactivity disorder (ADHD) symptom criteria that included or did not include the label “ADHD.” “ADHD”-labeled vignettes elicited greater perceptions of the child's impairment as well as more negative emotions and less confidence in the participants, although it also increased participants' willingness to implement treatment interventions. Ratings were similar to vignettes of boys versus girls; however, important differences in ratings between teachers and education students emerged and are discussed. Finally, we investigated the degree to which teachers' professional backgrounds influenced bias based on the label “ADHD.” Training specific to ADHD consistently predicted label bias, whereas teachers' experience working with children with ADHD did not.  相似文献   

7.
Zhu L  Gigerenzer G 《Cognition》2006,98(3):287-308
Can children reason the Bayesian way? We argue that the answer to this question depends on how numbers are represented, because a representation can do part of the computation. We test, for the first time, whether Bayesian reasoning can be elicited in children by means of natural frequencies. We show that when information was presented to fourth, fifth, and sixth graders in terms of probabilities, their ability to estimate the Bayesian posterior probability was zero. Yet when the same information was presented in natural frequencies, Bayesian reasoning showed a steady increase from fourth to sixth grade, reaching an average level of 19, 39, and 53%, respectively, in two studies. Sixth graders' performance with natural frequencies matched the performance of adults with probabilities. But this general increase was accompanied by striking individual differences. More than half of the sixth graders solved most or all problems, whereas one third could not solve a single one. An analysis of the children's responses provides evidence for the use of three non-Bayesian strategies. These follow an overlapping wave model of development and continue to be observed in the minds of adults. More so than adults' probabilistic reasoning, children's reasoning depends on a proper representation of information.  相似文献   

8.
个体量词是汉藏语系的特色词类, 它一般不能单独充当句子成分, 只有与名词组合在一起构成计数名词短语以后, 才能够灵活地使用。个体量词的存在顺应了汉语语音、语法的发展要求, 体现了汉民族具象思维发达的思维特点。它按照一定的规律有选择地搭配名词, 并且在认知加工中对名词发挥着重要的选择与限制作用。研究个体量词的存在价值、个体量词在认知加工中的作用、个体量词与名词之间相互关联的实质, 对个体量词的理解和学习具有重要的意义。  相似文献   

9.
  总被引:2,自引:0,他引:2  
Many scholars are interested in understanding the process by which an independent variable affects a dependent variable, perhaps in part directly and perhaps in part indirectly, occurring through the activation of a mediator. Researchers are facile at testing for mediation when all the variables are continuous, but a definitive answer had been lacking heretofore as to how to analyze the data when the mediator or dependent variable is categorical. This paper describes the problems that arise as well as the potential solutions. In the end, a solution is recommended that is both optimal in its statistical qualities as well as practical and easily implemented: compute zMediation.  相似文献   

10.
    
In this research, we explored the construal of mythical creatures created out of ordinary animals by approaching the selection of Chinese classifiers zhi and ge. Monster figures as such are viewed ambiguously as an animal or as a novel entity. From the lexico-semantic perspective, we surveyed the co-occurrences of these two classifiers with two Chinese labels commonly used for monsters: guaishou and guaiwu, which provide lexical cues for the finely nuanced difference in (non-)/animate readings respectively. From the conceptual perspective, we examined the acceptability as to the uses of these two classifiers for the monster figures, the structures of which incurred different effects of novelty. We found that the (non-)/animal-like interpretation is encoded by zhi and ge at both the linguistic and conceptual layers. The findings of our work have implications for the relation of language and thought, our understanding of fictional world entities, and our understanding of classifier cognition.  相似文献   

11.
Labels have been shown to play an important role in inductive generalization; however, the mechanism by which labels contribute to generalization early in development remains unclear. We investigated two factors that may influence the inductive potential of labels: semantic similarity and co-occurrence probability. Results suggested that adults and 6-year-olds rely on semantic similarity of labels and that their generalizations are not affected by co-occurrence probability. Specifically, generalization patterns were qualitatively similar for co-occurring semantically similar labels (e.g., bunny-rabbit) and non-co-occurring semantically similar labels (e.g., rock-stone) in 6-year-olds and adults. Unlike 6-year-olds and adults, 4-year-olds were likely to generalize co-occurring labels but not non-co-occurring labels. Possible mechanisms by which co-occurrence probability may influence label generalization in young children are discussed.  相似文献   

12.
    
Grammatical categories represent implicit knowledge, and it is not known if such abstract linguistic knowledge can be continuously grounded in real‐life experiences, nor is it known what types of mental states can be simulated. A former study showed that attention bias in peripersonal space (PPS) affects reaction times in grammatical congruency judgments of nominal classifiers, suggesting that simulated semantics may include reenactment of attention. In this study, we contrasted a Chinese nominal classifier used with nouns denoting pinch grip objects with a classifier for nouns with big object referents in a pupil dilation experiment. Twenty Chinese native speakers read grammatical and ungrammatical classifier‐noun combinations and made grammaticality judgment while their pupillary responses were measured. It was found that their pupils dilated significantly more to the pinch grip classifier than to the big object classifier, indicating attention simulation in PPS. Pupil dilations were also significantly larger with congruent trials on the whole than in incongruent trials, but crucially, congruency and classifier semantics were independent of each other. No such effects were found in controls.  相似文献   

13.
Philosophical analysis is commonly assumed to involve decomposing the meaning of a sentence or an expression into a set of conceptually basic constituent parts. This essay challenges this traditional view by examining the potential semantic roles that classifier phrases play in Chinese. It is suggested that the conceptual resources necessary for justifying claims about the semantical status of natural language classifier phrases should be informed in part by methods that accommodate ontogenic and evolutionary contexts. Evidence is provided for the view that many Chinese classifiers (but not all) are features regimented in the grammar of Chinese that have no functional role in normal adult communication, but which play an ontogenetic role in the child's development of linguistic competency. Furthermore, it is suggested that this ontogenetic role has features in common with the phylogenetic processes by which Chinese or its classical variants came about, as a later product of mechanisms that evolved in the species in accordance with varying demands for successful communication.  相似文献   

14.
    
Even in the presence of substantial empirical evidence which proves that psychological risk factors play a significant role in onset of ischemic heart disease (IHD), in Pakistan researchers have not paid much attention to exploring these factors. This research was mainly undertaken to investigate whether psychological factors such as stress, anxiety, depression, anger, and hostility in their intense states are prevalent within the indigenous patients with IHD. It was hypothesized that: High levels of perceived stress will significantly increase risk for IHD versus lower levels of perceived stress; high levels of anxiety will significantly increase the risk for IHD versus lower levels of anxiety; high levels of depression will increase the chances of IHD versus lower levels. Likewise, it was proposed that elevated trait anger will significantly increase risk for IHD versus lower levels of trait anger and that higher levels of hostility significantly increase risk for IHD versus lower levels. A case–control research design was employed to conduct this study. To investigate the association of the abovementioned factors with IHD and to find whether these factors differ between cases and controls, we solicited a sample of 190 patients with confirmed diagnosis of IHD and 380 age‐ and gender‐matched community controls, who were free of IHD, aged 35 to 55 years. Standardized tools to measure psychological factors were translated and semistandardized into the national language and their psychometric properties were predetermined before use in this study. To infer the proposed hypotheses, multivariate binary logistic regression analysis was carried out. Results highlight significant association between stress, depression, anxiety, anger, and IHD. Implications for the implementation of routine screening for psychological factors, particularly stress, depression and anger, are proposed.  相似文献   

15.
心理差异量对儿童青少年分类活动影响的研究   总被引:4,自引:1,他引:3  
本研究选择自制的、被试从前未看过的墨渍图为实验材料,探讨心理差异量对分类活动的影响。以40名11-20岁儿童青少年为被试,一方面使用速示仪测量墨渍图之间的心理差异量,一方面要求被试对墨渍图进行自由分类,并说明理由。结果发现:①心理差异量直接影响分类结果。②心理差异量在11岁、14岁与17岁、20岁之间存在着非常显著的差异(P〈0.01)。③分类标准的选择的年龄差异主要表现在分类标准的复杂性方面。  相似文献   

16.
17.
We generalize the concept of a ‘ranking associated with a linear order’ from linear orders to arbitrary finite binary relations. Using the concept of differential of an object in a binary relation as theoretical primitive, we axiomatically introduce several measurement scales, some of which include the generalized ranking as a special case. We provide a computational formula for this generalized ranking, discuss its many elegant properties and offer some illustrating examples.  相似文献   

18.
    
This rejoinder addresses the thoughtful issues raised by the commentators. We hold to the analytical solution of fitting X  M (to obtain a and sa) and X&;M→ (to obtain b and sb) via regression or logistic regression, depending on whether M and Y are continuous or categorical. Then researchers compute za, zb, and ZMediation.  相似文献   

19.
The present paper explores the role of motivation to observe a certain outcome in people’s predictions, causal attributions, and beliefs about a streak of binary outcomes (basketball scoring shots). In two studies we found that positive streaks (points scored by the participants’ favourite team) lead participants to predict the streak’s continuation (belief in the hot hand), but negative streaks lead to predictions of its end (gambler’s fallacy). More importantly, these wishful predictions are supported by strategic attributions and beliefs about how and why a streak might unfold. Results suggest that the effect of motivation on predictions is mediated by a serial path via causal attributions to the teams at play and belief in the hot hand.  相似文献   

20.
3~7岁儿童分类方式对分类结果影响的研究   总被引:2,自引:0,他引:2  
以300名3-7岁儿童为被试,探讨在相同条件下,三种不同的分类方式(自由分类、根据言语指导分类、根据目标图分类)对分类结果的影响,结果发现:从总的分类结果来看分类方式对分类结果的影响是较显著的,这种影响存在着明显的年龄差异,6岁组分类方式对分类结果的影响最大。  相似文献   

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