Statistical learning of action: The role of conditional probability     

Meyer M  Baldwin D 《Learning & behavior》2011,39(4):383-398

Identification of distinct units within a continuous flow of human action is fundamental to action processing. Such segmentation may rest in part on statistical learning. In a series of four experiments, we examined what types of statistics people can use to segment a continuous stream involving many brief, goal-directed action elements. The results of Experiment 1 showed no evidence for sensitivity to conditional probability, whereas Experiment 2 displayed learning based on joint probability. In Experiment 3, we demonstrated that additional exposure to the input failed to engender sensitivity to conditional probability. However, the results of Experiment 4 showed that a subset of adults—namely, those more successful at identifying actions that had been seen more frequently than comparison sequences—were also successful at learning conditional-probability statistics. These experiments help to clarify the mechanisms subserving processing of intentional action, and they highlight important differences from, as well as similarities to, prior studies of statistical learning in other domains, including language.  相似文献   

我的吻在哪里     

M·A·尤契哈特 《中华家教》2011,(1):43

小女孩儿名叫辛迪。她有一个和睦的家,日子过得很不错。但这个家从一开始就缺少了一样东西,只不过辛迪还没有意识到。辛迪9岁那年,有一天到朋友德比家去玩儿,留在那儿过夜。睡觉时,德比的妈妈给两个女孩儿盖上被子,并亲吻了她们,祝她们晚安。"我爱你。"德比的妈妈说。"我也爱你。"德比说。辛迪惊奇得睡不着觉。因为在这之前从没人吻  相似文献   

博物馆之夜     

M·T·考弗因  唐兵 《故事作文(高年级版)》2004,(1)

夜闯博物馆我顿了顿,等侍者拿走菜单,才开口:“如果我们偷偷溜出旅馆,自己去博物馆,一定会出事的。”“不,不会的,托尼。”贾尼丝说,“我查过了,博物馆礼拜六晚上通常九点关门,我们只要赶在去看音乐剧的卡尔森小姐和其他同学回来之前回到旅馆就行了。”“来得及吗?”我有点担心。“这次作业我必须拿个好分数。”贾尼丝说,“否则,他们会把我从尖子班开除的。”“我也是。”贾森附和道,“上次我收集的资料不够,起码得再去一趟。”他们全都盯着我。点了点头:“好吧,反正我也要花更多的时间画我的动物草图,那些图要用在论文里。不过,在走之前,我…  相似文献   

自学单元程序教材介绍:化学键(二)     

Iain M.Duncan  黄经昌 《化学教学》1982,(4)

伸展在晶格内的离子键很强,因此从晶格中移走离子是困难的。由于这个原因,离子型化合物具有较高的熔点和沸点。存在于共价型固体或液体中的分子间的作用力没有这样强(除1～2例外),使分子聚集在一起的作用力布遍于固体中也是不强的。考虑下列的气化热:  相似文献   

Access to postsecondary education through sign language interpreting   总被引：1，自引：0，他引：1  

Marschark M  Sapere P  Convertino C  Seewagen R 《Journal of deaf studies and deaf education》2005,10(1):38-50

Despite the importance of sign language interpreting for many deaf students, there is surprisingly little research concerning its effectiveness in the classroom. The limited research in this area is reviewed, and a new study is presented that included 23 interpreters, 105 deaf students, and 22 hearing students. Students saw two interpreted university-level lectures, each preceded by a test of prior content knowledge and followed by a post-lecture assessment of learning. A variety of demographic and qualitative data also were collected. Variables of primary interest included the effects of a match or mismatch between student interpreting preferences (interpreting vs. transliteration) and the actual mode of interpreting, student-interpreter familiarity, and interpreter experience. Results clarify previous contradictory findings concerning the importance of student interpreting preferences and extend earlier studies indicating that deaf students acquire less than hearing peers from interpreted college-level lectures. Issues relating to access and success in integrated academic settings are discussed as they relate to relations among student characteristics, interpreter characteristics, and educational settings.  相似文献   

我们在教书中育人     

M.B.чортковская  陈一新 《职教译丛》2001,(3):14-15

  相似文献   

Parameters in television captioning for deaf and hard-of-hearing adults: effects of caption rate versus text reduction on comprehension     

Burnham D  Leigh G  Noble W  Jones C  Tyler M  Grebennikov L  Varley A 《Journal of deaf studies and deaf education》2008,13(3):391-404

Caption rate and text reduction are factors that appear to affect the comprehension of captions by people who are deaf or hard of hearing. These 2 factors are confounded in everyday captioning; rate (in words per minute) is slowed by text reduction. In this study, caption rate and text reduction were manipulated independently in 2 experiments to assess any differential effects and possible benefits for comprehension by deaf and hard-of-hearing adults. Volunteers for the study included adults with a range of reading levels, self-reported hearing status, and different communication and language preferences. Results indicate that caption rate (at 130, 180, 230 words per minute) and text reduction (at 84%, 92%, and 100% original text) have different effects for different adult users, depending on hearing status, age, and reading level. In particular, reading level emerges as a dominant factor: more proficient readers show better comprehension than poor readers and are better able to benefit from caption rate and, to some extent, text reduction modifications.  相似文献   

Maltreatment perpetrators: a 54-month analysis of recidivism     

Way I  Chung S  Jonson-Reid M  Drake B 《Child abuse & neglect》2001,25(8):1093-1108

OBJECTIVE: This study compared recidivism rates for alleged maltreatment perpetrators whose initial report was substantiated and those whose initial report was not substantiated, to determine whether they returned to the child welfare system at differing rates. METHOD: Statewide administrative child welfare services data over a period of 4 1/2 years was analyzed. The sample included 31,531 perpetrators of intrafamilial maltreatment. Separate analyses were conducted for each type of maltreatment (sexual abuse, physical abuse, and neglect). RESULTS: Bivariate relationships (substantiation status and recidivism) were analyzed using survival curves, and the study found that recidivism patterns differed by type of maltreatment and by substantiation status at the index event. Multivariate analyses using Cox Proportional Hazards models found that bivariate relationships held true even when controlling for neighborhood mean income, ethnicity, and gender. CONCLUSIONS: The study's finding that perpetrators whose index event was not substantiated return to the child welfare system at a high rate suggests the need to learn how to discriminate those unsubstantiated alleged perpetrators who are most at risk for recidivism. The finding of frequent cross-type recidivism indicates that intervention should focus on common themes across maltreatment types.  相似文献   

Gesture as a window on children's beginning understanding of false belief     

Carlson SM  Wong A  Lemke M  Cosser C 《Child development》2005,76(1):73-86

Given that gestures may provide access to transitions in cognitive development, preschoolers' performance on standard tasks was compared with their performance on a new gesture false belief task. Experiment 1 confirmed that children (N=45, M age=54 months) responded consistently on two gesture tasks and that there is dramatic improvement on both the gesture false belief task and a standard task from ages 3 to 5. In 2 subsequent experiments focusing on children in transition with respect to understanding false beliefs (Ns=34 and 70, M age=48 months), there was a significant advantage of gesture over standard and novel verbal-response tasks. Iconic gesture may facilitate reasoning about opaque mental states in children who are rapidly developing concepts of mind.  相似文献   

电脑杀手 齐佩在冷笑     

M·T·考弗因  周晴 《故事作文(高年级版)》2002,(11)

齐佩在冷笑１刀刺进了枕头里，鹅毛四处乱飞！詹尼抽了个空朝插头那面墙爬去，使尽浑身力气将插头拔松了。所有的一切都消失了，屏幕恢复了灰色，布赖恩———不再是齐佩，松开了手指，小刀滑落到了地板上。詹尼赶紧将小刀收好，这才跪在布赖恩旁边，布赖恩一动不动地躺在地上。“布赖恩，你能听到我的声音吗？”詹尼轻轻地叫他。“发生了什么事情？”布赖恩很茫然地睁开眼睛，“我为什么会在这里？我，我……”“这正是我想问你的！”詹尼说。“我，我想睡觉！”布赖恩不敢正视姐姐的眼睛，怯怯地说。“是你插上电源的吗？”“是的。”布赖…  相似文献