Effects of preweaning environmental enrichment on later problem-solving behavior in rats

Two experiments investigated the importance of visual sensory modality in mediating enriched environmental effects during the preweaning period, and the importance of onset and duration of the enriched experience during the same period. Rat mothers and pups were exposed together in an enriched environment for either 7 or 11 days at different periods from Day 1 to Day 21. Also included was a group of rats which received only handling from Day 11 to Day 21 postpartum and another group in which the mothers were exposed to the enriched environment during the last trimester of pregnancy. Some rats were tested at 27 days of age, and others were tested at 64 days of age in the Hebb-Williams maze test. It was found that exposure in the enriched environment for a period of 7 days before the eyes opened improved rats’ problem-solving behavior above that of control rats and to the level of rats which received such experience after the eyes had opened. Handling of rats did not improve problem-solving behavior, nor did exposure during the gestation period. It was concluded that vision is not the most important factor in mediating effects during the preweaning period, since improvement in problem-solving behavior can occur before the visual system is fully developed. It was suggested that the beneficial enrichment effects might be mediated by the mother, who, in some way, transmits additional stimulation to the infant rat during this early stage of development.     

Imprinting of ducklings to a second stimulus when a previously imprinted stimulus is occasionally presented

Newly hatched ducklings were imprinted to one stimulus and then given prolonged visual exposure to a second discriminable stimulus. Filial behavior toward the second stimulus developed more slowly when the original imprinting stimulus was occasionally presented during exposure to the second stimulus than when the original stimulus was withheld during such exposure. Results were interpreted in terms of a possible motivational aftereffect following presentations of the original imprinting stimulus.     

Association between attitudes of filial responsibility and parent caregiving behavior

Objective: To analyze the association between attitudes of filial responsibility and adult child caregivers’ behaviors in the Southern Region of Brazil.

Methods: Cross-sectional study with 100 child caregivers of older adults. The data were collected through an interview using the protocol of filial responsibility adapted and validated to Brazilian Portuguese. Filial Expectation and Filial Piety scales evaluated the attitudes of filial responsibility. Caring behaviors assessed were: instrumental support, emotional, financial support, and companionship. The variables that presented p< .20 value in the bivariate analysis were inserted into a multivariate Poisson regression model.

Results: Financial and emotional support behaviors were significantly associated with filial piety (p = .050 and p = .001, respectively) and filial expectation (p = .013 and p = .023, respectively). Providing companionship was associated with filial piety (p = .015).

Conclusion: Attitudes of filial responsibility are associated with some but not all caregiving behaviors. Brazilians caring for older parents show more similarities to Chinese than to Canadian caregivers. Furthermore, filial responsibility and caregiving behaviors are strongly affected by Brazilian social and cultural norms. Reasons are discussed.     

Sex differences in rats’ stationary exploration as a function of stimulus and environmental novelty

Stationary visual scanning and sniffing of novel stimuli were measured using a head-poke response to supplement existing equivocal data on sex differences in exploration. With a short exposure to a novel apparatus, males and females showed a similar frequency of exploratory bouts, but the bouts were longer in females, showing that the sex difference is independent of a simple activity difference. With longer exposure, the difference was reversed, with males “compensating” for their initially lower level. Following familiarization to the apparatus, the sexes did not differ in exploration of an introduced novel stimulus. These results are consistent with males being more susceptible to inhibitory influences, such as disturbance and extreme novelty. Differences in within-trial changes in the level of exploration of a novel stimulus in novel and familiar environments were also observed.     

贵州省环境保护中政府行为研究——基于案例的分析

环境保护具有强外部性影响,需要政府行为的干预促成生态系统的和谐统一。政府应从科学的环境政策制定、完善环境管理制度、建立并优化社会参与环境保护机制等方面促成环境保护与社会发展同步进行。     

论中国传统文化中的“孝“

“孝”的原始含义是崇拜祖先、孝敬祖先,以祈求祖先对其子孙的庇佑,属于人伦范畴。后被统治阶级引伸到政治生活中,与礼、义、忠、信并列而成为统治人民的一种工具。本对“孝”在不同历史时期的衍化及其二种性探本溯源,吸取精华、剔除糟粕、以丰富社会主义精神明建设的内容。     

Variables that influence the environmental behavior of adults

This study focuses on understanding the factors that encourage adults’ environmental behavior. This mixed approach methodology study used 10 Likert type questionnaires to collect data about nine cognitive and affective components that might influence environmental behavior. The qualitative data was collected through open questions and interviews. The main sample included 656 participants from amongst Israel’s working population. The questionnaires were found both reliable and valid. Most of the explored cognitive and affective aspects appeared to act as predictors of environmental behavior. The study indicates that environmental behavior is driven by ‘egoistic’ concerns rather than by altruistic views and motivations.     

Genetic and environmental influences on sex-typed behavior during the preschool years

The genetic and environmental etiologies of sex-typed behavior were examined during the preschool years in a sample of 3,990 three- to four-year-old twin and non-twin sibling pairs. Results showed moderate genetic and significant shared environmental influence for boys and substantial genetic and moderate shared environmental influence for girls. For both boys and girls, twin-specific shared environmental effects contributed to twins' similarity in gender role behavior and accounted for approximately 22% of the shared environmental variance. These findings extend previous research conducted with older samples by showing not only important genetic contributions to gender role behavior but also an important role for shared environment. The inclusion of non-twin siblings showed that some of the shared environmental influence is specific to twins.     

The effects of tactile stimulation on imprinting in ducklings after the sensitive period

Four-day-old ducklings received visual-plus-tactile exposure to one novel object and visual-only exposure to a different novel object. In a subsequent test, strong suppression of ongoing distress vocalization was exerted only by the object to which visual-plus-tactile exposure had been given. With these results, the experimental conditions under which physical contact is known to facilitate the initiation of imprinting are extended to include subjects that are past the sensitive period.     

Some effects of early social stimulation on the emotional reactivity of ducklings

Newly hatched Khaki Campbell ducklings were housed with a conspecific for 24 h beginning at either 1 or 5 days of age. A third group of ducklings received no social stimulation. When tested on Day 7, ducklings afforded early social stimulation exhibited less distress calling and crouching in a novel open field than ducklings exposed to late or no social stimulation. A second experiment asked whether the above result was due to early social stimulation per se or to the separation which occurred at its termination. Newly hatched ducklings were housed with a conspecific beginning on Day 1. One-half of the birds were separated from their companions on Day 2; the rest were separated on Day 6. On Day 7, the ducklings that were separated early exhibited less crouching and distress calling in a novel open field than the birds that were separated late. This finding implies that the withdrawal of social stimulation, rather than social stimulation perse, was responsible for the reduced emotional behavior observed in Experiment I. It is concluded that early withdrawal of social stimulation generated a strong aversive reaction and that it was the strength and timing of this reaction that mediated the emotionality moderating effects found here. Under these circumstances, the primary function of early social stimulation was to establish a condition whereby the aversive reaction generated by separation would occur early.     

Effects of a 1-day environmental education intervention on environmental attitudes and connectedness with nature

Besides cognitive learning effects, short-term environmental education (EE) is often regarded as ineffective in intervening with participants' environmental attitudes and behaviour. However, in Germany, school classes often participate in such 1-day EE programmes because they better match the school curriculum in contrast to longer (residential) programmes. We therefore monitored a 1-day outreach EE programme on global climate change to reveal whether environmental attitudes and/or connectedness with nature of tenth graders are affected. Students from German high schools (college preparatory secondary school level, ‘Gymnasium’) (N?=?114) from age 14 to 19 participated in the programme (treatment group). It consisted of two student-centred learning units on the topic of climate change. Additionally, we chose a control group of students who did not participate in the programme. To measure students' environmental attitudes and connectedness with nature, we administered the Two Major Environmental Values (2-MEV) and the Inclusion of Nature in Self scale in a pre-, post- and retention test design. The pre-test was administered 1 week before, the post-test directly after and the retention test 4 to 6 weeks after programme participation. Analyses revealed a positive long-term effect only for utilitarian values (one of the two major environmental factors of 2-MEV) which decreased significantly. Therefore, depending on the programme's content, short-term EE programmes indeed may have an influence on participants' environmental attitudes.     

浅析科技查新报告质量控制

查新报告作为查新工作的重要体现形式,如何更好地控制其质量显得尤为重要。本文根据多年工作经验,从项目科学技术要点与查新点、文献检索、检索结果和查新结论等方面对查新质量报告的控制进行了分析研究,并提出相关的注意事项。     

Effects of prior response-contingent reinforcement on superstitious behavior

Three pigeons were exposed to fixed-time (FT) 15 sec, fixed-interval (FI) 15 sec for performing an arbitrary response, a reversal back to FT 15 sec, and then extinction (no reinforcement). During each phase, a computer-controlled tracking system continuously recorded the position of the bird’s head as it moved freely in the experimental chamber. During the first exposure to FT 15 sec, all 3 birds developed a pattern of feeder-wall-directed behavior with occasional circular excursions from the feeder immediately following reinforcement. During FI 15 sec, all birds performed the arbitrary operant, which consisted of contacting a virtual target sphere near the rear of the chamber, and did not engage in feeder-wall-directed behavior. During the reversal back to FT 15 sec, the birds developed a behavior sequence consisting of moving in the direction of the target sphere after reinforcement, followed by feeder-wall-directed behavior prior to the next reinforcement. During extinction, either moves toward the target sphere or wall-directed behavior occurred separately, interspersed with reappearance of the two as a sequence, followed by cessation of both members of the behavior sequence. These findings indicate that prior reinforcement of an arbitrary response can affect the location and form of superstitious behavior that develops near the beginning of the interreinforcement interval, but that other factors (e.g., immediacy of reinforcement) affect the location and form of the behavior near the end of the interval. The findings can be interpreted in the context of superstitious chaining.     

论当代孝文化在高校思德教育中的现实意义

人类的传承繁衍、社会家庭的复杂人际关系告诉我们,"家"是最小的也是最基本的的社会结构。"百善孝为先"告诉我们为人最基本的善良就是善待和孝敬自己的父母,用行动感激给予我们生命并抚养成人的人,而"子欲养而亲不待"的现实也时刻警惕我们,尽行孝道需要及时。孝文化不仅体现了一个人得修养、价值观等,也是衡量一个民族文明的标尺,更是检验一个国家的文化价值观传承的重要标准。     

蛋白质分子印迹技术研究进展

蛋白质分子印迹聚合物具有高度选择吸附性，能专一性识别蛋白质模板分子．本文综述了蛋白质分子印迹聚合物的制备、选择性识别机制及其选择性吸附的影响因素，并对蛋白质分子印迹技术的应用前景进行了展望。     

和谐社会与高校现代孝道教育初探

在我国高校进行现代孝道教育,对构建和谐社会,培养爱国热情,提高大学生自身修养具有重要作用.现代孝道教育的内容包括感恩教育、养亲教育和敬亲教育.现代孝道教育可通过知性教育、情感培养和强化践行等方式来实施.     

Imprinting in older ducklings: Some tests of a reinforcement model

Ducklings (Anas Platyrhynchos domesticus) older than the so-called critical period (Days 1 and 2 posthatch) were exposed to an imprinting stimulus after various experimental histories. The first study found that in previously isolated 10-day-old subjects the stimulus exhibited the same capacity to reinforce an operant response and to generate a burst-like pattern of responding as in ducklings imprinted to it on Day 1. In Experiment 2, an imprinting stimulas exhibited reinforcing capacities in 5 to 10-day-old ducklings that had previously been imprinted to a different stimulus. Most of these ducklings came to prefer the second imprinting stimulus over the first. Experiment 3 revealed that in 5-day-old ducklings with a prior history of imprinting to a different stimulus, the otherwise neutral features of a new imprinting stimulus acquired the same kind of persistent control over distress vocalization that they acquire in younger, naive subjects. In all these studies, the only difference between imprinting in older vs. younger subjects was that in older subjects a novel imprinting stimulus initially evoked fear reactions rather than filial behavior. These findings contradict the traditional view of imprinting as an irreversible process that occurs only during a brief critical period, but are entirely consistent with a reinforcement model of imprinting.     

Effects of an art-based environmental education camp program on the environmental attitudes and awareness of diverse youth

ABSTRACT

This study used a combination of surveys and drawing-based metrics to evaluate whether integration of art-based activities into EE camp programing could enhance environmental orientations of diverse youth ages 6–12 (n?=?285) in Athens, GA, USA. Compared to a control group, art-based EE had a positive effect on children’s eco-awareness and environmental knowledge. However, effects of the art-based EE were comparable to those observed for a conventional EE summer camp. Interactions between the treatment and demographic variables (e.g., gender, age, race/ethnicity) were minimal, suggesting that both types of EE programing worked well for different groups of youth. Results highlight the potential value of art in EE research and practice.