Discrimination and classification of rising and nonrising pitch patterns by the European starling (Sturnus vulgaris)

In a series of four experiments, starlings learned to classify pitch patterns according to pattern structure. In Experiments 1 and 2, the starlings learned to discriminate a series of pairs of 1ourtone patterns in which one of the patterns rose in pitch and the other pattern did not. The starlings in these initial two experiments did not attend to pattern structure at all. Rather, they discriminated patterns according to the relative pitch of the initial pattern tones. In Experiment 3, the same starlings discriminated the same patterns from Experiments 1 and 2 in a new context that tempered the salience of individual pattern tones. The starlings initially failed to discriminate in the new context, but eventually learned to do so. In Experiment 4, the starlings classified novel pitch patterns according to their pattern structure. These experiments identify a hierarchy of relative pitch strategies, as well as a sophisticated conceptual capacity for the perception and classification of pitch patterns by starlings.     

Effects of the Shift to English-Only Instruction on College Outcomes: Evidence from Central Asia

Abstract

English-only college education in non-English speaking countries is a rapidly growing phenomenon that has been dubbed as the most important trend in higher education internationalization. Despite worldwide popularity, there is little empirical evidence about how the transition to English-only instruction affects students’ academic outcomes. Using a natural experiment at a selective university in Central Asia and a difference-in-differences strategy, we estimate the causal effect of switching to English-only instruction on students’ college outcomes. We find that the introduction of English-only instruction led to a decrease of GPAs and probability of graduation and an increase in the number of failed course credits. Although negative, the effects were short-lived. The difference-in-differences estimates and the examination of potential mechanisms suggest that at least in selective universities in non-English speaking countries, the switch to English-only instruction may affect college outcomes negatively at the time of transition but may not necessarily imply longer-run negative effects.     

非洲之珠--乌干达

If you think that the typical Africa countryside doesn’toffer you rolling emerald1 hills,snow capped mountains,misty forests and deep,crystal clear lakes then you haven’tbeen to Uganda.Even though Uganda is a small country,itoffers all of this and a lot more-white water rafting,gorilla2tracking,game viewing and some of the best trekking inAfrica.Most importantly,the friendly and relaxed locals allspeak excellent English.What more could you ask for fromall exotic holiday destination?     

Supporting Teachers’ Understanding of Nature of Science and Inquiry Through Personal Experience and Perception of Inquiry as a Dynamic Process

Research in Science Education - One of today’s challenges in science education involves the development of appropriate conceptions of inquiry teaching and realizing how these experiences can...     

考研的程序

考研之前要对考研的整个流程有个大致的了解,它要经过那些阶段,在什么时间要做什么事情,这些都要心中有数,以便及早安排,计划周详.根据我的理解,考研大致要经过以下过程.     

Evaluation of a school-based sexual abuse prevention program: Cognitive and emotional effects

This study evaluated a school-based child sexual abuse prevention program which consisted of separate 2-hour workshops for children, parents, and teachers. Questionnaires concerning the children's knowledge about sexual abuse prevention and level of emotional distress were developed and administered to 88 children, ages 5-12, and 60 parents before and after the program. In addition, 12 teachers completed questionnaires about the children's level of emotional distress within 2 weeks after the program. Comparison of the children's knowledge before and after the program showed significant increases in knowledge about strategies for coping with potential abuse situations. Also individual children's responses were compared with their parents' responses. After the program the parents had a more accurate appraisal of their children's knowledge, and in addition, there was a significant increase in how much parents reported that they had talked with their children about sexual abuse. In terms of possible adverse emotional effects of the program, neither teachers nor parents noticed signs of increased emotional distress. In addition, the children reported that the program made them feel safer and better able to protect themselves. The findings support the value of providing sexual abuse prevention programs to children.     

Analysis of Propagation Plans in NSF-Funded Education Development Projects

Increasing adoption and adaptation of promising instructional strategies and materials has been identified as a critical component needed to improve science, technology, engineering, and mathematics (STEM) education. This paper examines typical propagation practices and resulting outcomes of proposals written by developers of educational innovations. These proposals were analyzed using the Designing for Sustained Adoption Assessment Instrument (DSAAI), an instrument developed to evaluate propagation plans, and the results used to predict the likelihood that a successful project would result in adoption by others. We found that few education developers propose strong propagation plans. Afterwards, a follow-up analysis was conducted to see which propagation strategies developers actually used to help develop, disseminate, and support their innovations. A web search and interviews with principal investigators were used to determine the degree to which propagation plans were actually implemented and to estimate adoption of the innovations. In this study, we analyzed 71 education development proposals funded by the National Science Foundation and predicted that 80% would be unsuccessful in propagating their innovations. Follow-up data collection with a subset of these suggests that the predictions were reasonably accurate.     

A comparison of Thai and American counselling students perceptions of counselling

The expectancies that people of different cultures bring to counselling affect the outcomes of counselling. It was the purpose of this study to examine the ways that counselling students in two different countries, Thailand and the United States, perceived Counselling. The evaluative and potency scales of the Semantic Differential were used to compare the attitudes of these students related to Counselling, Counsellors, and Group Counselling. No significant difference were found in the ratings of the two groups of students on the evaluative scale for Counselling, Counsellors, or Group Counselling, but the American students rated the potency scales for these three variables significantly higher than the Thai students. Implications of these findings are discussed.     

Family size,birth order,and intelligence in a large South American sample

The confluence theory, which hypothesizes a relationship between intellectual development birth order, and family size, was examined in a colombian study of more than 36,000 college applicants. The results of the study did not support the confluence theory. The confluence theory states that the intellectual development of a child is related to average mental age of the members of his family at the time of his birth. The mental age of the parents is always assigned a value of 30 and siblings are given scores equivalent to their chronological age at the birth of the subject. Therefore, the average mental age of family members for a 1st born child is 30, or 60 divided by 2. If a subject is born into a family consisting of 2 parents and a 6-year old sibling, the average mental age of family members tends, therefore, to decrease with each birth order. The hypothesis derived from the confluence theory states that there is a positive relationship between average mental age of a subject's family and the subject's performance on intelligence tests. In the Colombian study, data on family size, birth order and socioeconomic status was derived from college application forms. Intelligence test scores for each subject was obtained from college entrance exams. The mental age of each applicant's family at the time of the applicant's birth was calculated. Multiple correlation analysis and path analysis were used to assess the relationship. Results were 1) the test scores of subjects from families with 2,3,4, and 5 children were higher than test scores of the 1st born subjects; 2) the rank order of intelligence by family size was 3,4,5,2,6,1 instead of the hypothesized 1,2,3,4,5,6; and 3) only 1% of the variability in test scores was explained by the variables of birth order and family size. Further analysis indicated that socioeconomic status was a far more powerful explanatory variable than family size.