A small sociology of maternal memory

Memory is an enormously important resource for the social sciences. This paper takes the subject of maternal memory to examine a corpus of work in the sociology of childbirth concerned with how women remember the experience of childbirth. It suggests that the sociology of memory has been more concerned with collective than individual experiences, and that women's memories of childbirth have generally been treated as a special case, rather than as a route to enhanced understandings of how memory works in relation to the all‐important topics of time, identity and social change. Drawing on data from a 37‐year follow‐up to a study of childbirth conducted in the 1970s, it argues that maternal memory shares key characteristics with other kinds of memory, but can be significant in allowing women to reposition themselves as active social selves in a process that is remembered as not allowing much agency or autonomy.     

Estimation of structural mean breaks for long-memory data sets

In long-memory data sets such as the realized volatilities of financial assets, a sequential test is developed for the detection of structural mean breaks. The long memory, if any, is adjusted by fitting an HAR (heterogeneous autoregressive) model to the data sets and taking the residuals. Our test consists of applying the sequential test of Bai and Perron [Estimating and testing linear models with multiple structural changes. Econometrica. 1998;66:47–78] to the residuals. The large-sample validity of the proposed test is investigated in terms of the consistency of the estimated number of breaks and the asymptotic null distribution of the proposed test. A finite-sample Monte-Carlo experiment reveals that the proposed test tends to produce an unbiased break time estimate, while the usual sequential test of Bai and Perron tends to produce biased break times in the case of long memory. The experiment also reveals that the proposed test has a more stable size than the Bai and Perron test. The proposed test is applied to two realized volatility data sets of the S&P index and the Korea won-US dollar exchange rate for the past 7 years and finds 2 or 3 breaks, while the Bai and Perron test finds 8 or more breaks.     

Sharing of emotional memories with a listener: differences between adolescents and emerging adults

Research demonstrated a strong influence of personal narratives on emotions linked to memories. However, few studies considered shared narratives and the role of listener’s behavior, especially in adolescence and emerging adulthood. This paper aims to explore the impact of listening attitude on emotions related to memories in adolescents and emerging adults. A total of 157 participants were asked to choose a memory: in the experimental conditions (Attentive Listening, AL vs. Detached Listening, DL), they narrated it to a listener, in the Control Group, they internally reflected about it. Emotions linked to memory at the first time, to narrative/reflection, and to memory after 15 days were measured, as well as the perception of listener’s behavior. Results showed that participants perceived the differences of the listening, although adolescents perceived less listener’s detached stance. Moreover, among adolescents, positive emotions increased after narrative for both experimental conditions, instead, among emerging adults, only AL condition participants increased their positive emotions. Moreover, adults maintained the positive effects of narrative also after 15 days. Authors discussed the role of an empathic context and the adolescent egocentrism in shared narratives about personal memories.     

历史记忆与族群认同

本文借鉴安东尼.史密斯的族群—象征主义理论,分别从神话、仪式两方面论述历史记忆与族群认同的关系以及族群认同的变动,认为族群认同既是情感—象征的,也是工具—政治—经济的,我们应该看到它们之间的关联以及利益、竞争的分配和规则。     

团队反思对员工绩效影响的跨层次研究

通过建立跨层次的中介效应模型,运用多层线性模型方法,考察团队反思对员工绩效的影响。选取交互记忆系统和团队绩效两个中介变量,基于86个企业团队的数据进行实证研究,指出团队反思对员工绩效存在跨层次的影响,并且在此影响机制中交互记忆系统起到了中介作用,但团队绩效对员工绩效的直接影响效应不显著,即团队绩效对员工绩效无明显促进作用。     

The k-factor GARMA Process with Infinite Variance Innovations

In this article, we develop the theory of k-factor Gegenbauer Autoregressive Moving Average (GARMA) process with infinite variance innovations which is a generalization of the stable seasonal fractional Autoregressive Integrated Moving Average (ARIMA) model introduced by Diongue et al. (2008 Diongue, A.K., Guégan, D. (2008). Estimation of k-Factor GIGARCH Process: A Monte Carlo Study. Communications in Statistics-Simulation and Computation 37:2037–2049.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]). Stationarity and invertibility conditions of this new model are derived. Conditional Sum of Squares (CSS) and Markov Chains Monte Carlo (MCMC) Whittle methods are investigated for parameter estimation. Monte Carlo simulations are also used to evaluate the finite sample performance of these estimation techniques. Finally, the usefulness of the model is corroborated with the application to streamflow data for Senegal River at Bakel.     

内隐记忆的概念反思、研究范式及研究进展

内隐记忆是认知心理学一个重要的研究领域,对于临床医学疾病诊断、记忆康复、心理咨询与治疗等工作具有重要的理论与现实意义。本文介绍了内隐记忆概念的界定及研究范式的发展,并从临床医学、人格特质、情绪状态、认知风格、认知加工及内隐记忆的个体差异等六个方面总结了相关领域的研究进展。     

基于LW估计的中国证券市场长记忆性实证研究

针对国内研究证券市场长记忆性主要采用的是时域方法,文章采用基于频域的半参数Local Whittle估计方法研究了中国证券市场的长记忆特性,并且和对数周期图回归(GPH)方法进行了比较。结果表明,LW方法具有不受时间频率的影响,能够有效消除时间序列中短期记忆和周期性对估计结果的影响等优点,明显优于GPH方法。实证结果表明,中国证券市场存在明显的长记忆性,并且长记忆行为在重大突发事件发生期间更加明显。文章还从长记忆的角度探讨了“政策市”的存在性和相关特点。     

Are children better witnesses than adolescents? Developmental trends in different false memory paradigms

Abstract

The current study compared older children’s (11/12-year-olds) and adolescents’ (14/15-year-olds) vulnerability to false memory creation using two different methods (i.e., the Deese/Roediger-McDermott [DRM] and memory conformity paradigms) involving neutral and negative stimuli. In line with previous research, a developmental reversal effect was found for the DRM paradigm, which means that when employing this method children displayed lower false memory levels than adolescents. However, when using the memory conformity paradigm, the opposite pattern was found, with adolescents forming fewer false memories than children. This indicates that in a co-witness context, adolescents are less prone to memory errors than children. The emotional valence of the stimuli used in both paradigms did not notably affect the production of false memories. There was no statistically significant correlation between false memories as measured by the DRM and the memory conformity paradigms. Altogether, the current study indicates that there is no single type of false memory as different experimental paradigms evoke different types of erroneous recollections. Additionally, our study corroborates past findings in the literature concerning the issue of developmental reversal, strengthening the idea that under certain circumstances children might indeed be better witnesses than adolescents.     

Markov regime switching in mean and in fractional integration parameter

We propose a specific general Markov-regime switching estimation both in the long memory parameter d and the mean of a time series. We employ Viterbi algorithm that combines the Viterbi procedures in two state Markov-switching parameter estimation. It is well-known that existence of mean break and long memory in time series can be easily confused with each other in most cases. Thus, we aim at observing the deviation and interaction of mean and d estimates for different cases. A Monte Carlo experiment reveals that the finite sample performance of the proposed algorithm for a simple mixture model of Markov-switching mean and d changes with respect to the fractional integrating parameters and the mean values for the two regimes.