Rigidity in social and emotional memory in the R6/2 mouse model of Huntington's disease

Four experiments were conducted to examine social and emotional memory in the R6/2 transgenic mouse model of Huntington’s disease. First, R6/2 mice were tested in a social transmission of food preference task where they had to acquire a preference for a flavoured food (acquisition) and subsequently to learn a preference for a different flavour (shifted reinforcement). R6/2 mice performed well in the acquisition trial. However, they were impaired in the shifted reinforcement trial and perseverated on the first preference learned. Second, mice were trained in an inhibitory avoidance paradigm, with either one or two footshocks delivered during the training. WT mice given one footshock showed retention levels lower than those of mice trained with two footshocks. By contrast, there was no difference in retention levels of R6/2 mice given either one or two footshocks. Third, mice were tested in an active avoidance task that paired a mild footshock with a warning light. R6/2 mice had a strong age-dependent deficit in this task. Finally, mice were tested in a conditioned taste aversion task that paired a saccharine solution with a nausea-inducing agent (LiCl). R6/2 mice displayed normal aversion, however this was not extinguished following repeated exposure to saccharine solution alone. Our data show that while R6/2 mice have functional hippocampus-based memory, they have deficits in striatum-based memory skills. Further, social and emotional memories appear to be encoded in a rigid way that is not influenced by subsequent learning or by arousal levels.     

Redemptive Experience in Relational Family Therapy: A Christian Perspective

We all long for relationships with others, because only in connecting with others can we develop our intrapsychic structure and become functional adults. We are psychologically predisposed to have a constant connection with others and are driven toward relationships with others. Our deepest yearnings are therefore devoted to building solid dialogue as the means of becoming fully human. We, therefore, consciously or unconsciously, long for a relationship where we can experience happiness, satisfaction and, above all, redemption or salvation from our dreads, miseries and unhappiness. In this article we presuppose that a therapeutic relationship, demonstrated in a psychoanalytic setting, namely in relational family therapy, can contain redemptive dimensions in which the inextinguishable longing for salvation is always present.

On the equivalence between elimination-by-aspects and generalised extreme value models of choice behaviour

Elimination-by-aspects and generalised extreme value offer competing paradigms for the representation of a common behaviour, that of individual discrete choice. Observing certain consistencies in their mathematical structure, several eminent authors have commented on the degree of equivalence between the two paradigms. Most contributions to this debate have, however, been less than definitive. More fundamentally, the contributions lack consensus. We advance the debate by establishing formal mathematical conditions under which three-alternative tree models from the two paradigms are exactly equivalent. We then extend our analysis to consider more general models, showing that equivalence can be established for general tree models, but not for cross-nested models.     

Satir Model of Family Therapy and Spiritual Direction

To consider a connection between the therapy model named under Virginia Satir and the practice of spiritual direction may arouse suspicion. This paper, however, attempts to show that the link between the two is natural, sensible, and inspiring, particularly for the part of spiritual direction. The first section of the paper first addresses the fact that spiritual direction, with its unique focus, is not to be confused with psychotherapy, then, discusses the recognized need to seek a psychologically sound model of spiritual direction. The second section describes some of the useful concepts in the Satir model and then relates them to the various aspects of spiritual direction. It is believed that the Satir model of therapy can enrich the practice of spiritual direction in a number of ways. Ekman P. C. Tam is the Spiritual Director of Tao Fong Shan Christian Centre, Hong Kong.     

Optimal Partitioning of Testing Time: Theoretical Properties and Practical Implications

This paper deals with optimal partitioning of limited testing time in order to achieve maximum total test score. Nonlinear optimization theory was used to analyze this problem. A general case using a generic item response model is first presented. A special case that applies a response time model proposed by Wang and Hanson (2005) is also presented. Theoretical properties of the optimal solution are derived. Their practical implications to optimal test-taking strategies are also discussed. The theoretical properties are in general agreement with the conventional advice to the examinees on pacing strategy.     

Interlevel Relations and Manipulative Causality

Summary  The topic of this article is the analysis of the relations between different levels of reality. The core argument is based on considerations of both an epistemology of action and manipulative causality as a criterion of object identity. The argumentation is extended towards the concepts of self-organization and self-regulation. Finally, several views on reduction and the problems of emergence and complexity are discussed.     

Continuous Dynamics in Real-Time Cognition

ABSTRACT— Real-time cognition is best described not as a sequence of logical operations performed on discrete symbols but as a continuously changing pattern of neuronal activity. The continuity in these dynamics indicates that, in between describable states of mind, mental activity does not lend itself to the linguistic labels relied on by much of psychology. We discuss eye-tracking and mouse-tracking evidence for this temporal continuity and provide geometric visualizations of mental activity, depicting it as a continuous trajectory through a state space (a multidimensional space in which locations correspond to mental states). When the state of the system travels toward a frequently visited region of that space, the destination may constitute recognition of a particular word or a particular object; but on the way there, the majority of the mental trajectory is in intermediate regions of that space, revealing graded mixtures of mental states.     

汉语中词长效应的初步实验研究

该文以回忆出一个词表的序列呈现顺序的正确率为指标考察汉语中的词长效应(Word-Length Effect)。实验材料为汉语中不同音节数目的词语。实验结果发现,在纯词表中,存在显著的词长效应。但是在混合词表中(包括长短词交替词表以及随机词表),词长效应会消失。研究结果支持词长效应的基于词表的解释,同时,项目的特异性也具有一定的作用。     

When what you say about others says something about you: Language abstraction and inferences about describers’ attitudes and goals

According to the linguistic category model ( [Semin and Fiedler, 1988] and [Semin and Fiedler, 1991]), a person’s behavior can be described at varying levels of abstraction from concrete (e.g., “Lisa slaps Ann”) to abstract (e.g., “Lisa is aggressive”). Research has shown that language abstraction conveys information about the person whose behavior is described (Wigboldus, Semin, & Spears, 2000). However to date, little research has examined the information that language abstraction may convey about describers themselves. In this paper, we report three experiments demonstrating that describers who use relatively abstract language to describe others’ behaviors are perceived to have biased attitudes and motives compared with those describers who use more concrete language.     

The paradox of the disrespected: Disrespected group members’ engagement in group-serving efforts

Previous research has demonstrated that intra-group respect can strengthen people’s group identification, and encourage them to exert themselves on behalf of their group. In the present contribution, we focus on the possibility that those who are not respected by other group members (i.e., the disrespected) can also display group beneficial behavior. Experiment 1 (N = 159) confirms this paradoxical premise and reveals that systematically disrespected group members indeed exert themselves on group-serving tasks. These findings were replicated in Experiment 2 (N = 110). Additional indicators in Experiment 2 demonstrate that the effort by systematically disrespected group members cannot be attributed to a desire to improve their acceptance in the group, but should be interpreted as attempts to assert the worth of the self separately from the group. Results are discussed in relation to the group-value model and insights on marginal group membership and social exclusion.