The episodic nature of episodic-like memories

Studying episodic memory in nonhuman animals has proved difficult because definitions in humans require conscious recollection. Here, we assessed humans' experience of episodic-like recognition memory tasks that have been used with animals. It was found that tasks using contextual information to discriminate events could only be accurately performed using recollection, not familiarity. However, tasks using temporal information to discriminate events could be accurately performed using either recollection or familiarity. The results strengthen the position that some episodic-like recognition memory tasks are a valid model of episodic memory. However, tasks that rely on temporal information may be susceptible to nonepisodic strategies.     

Attentional bias to negative information and 5-HTTLPR genotype interactively predict students' emotional reactivity to first university semester

People strongly differ in their emotional reactions to potentially stressing and challenging environmental circumstances. Two classes of individual differences have independently been reported to contribute to such emotional vulnerability: an attentional bias to negative information and a variation in the serotonin transporter gene (5-HTTLPR). The present study was conducted to investigate the possibility that these cognitive and genetic markers interact in their prospective prediction of emotional reactivity to an extended and mild potential stressor. Changes in dysphoria and anxiety across their first university semester were measured in 120 students. Results indicate that attentional bias toward negative information on Week 1 of the semester significantly predicted cross-semester changes in both anxiety and dysphoria. For the latter, this predictive capacity depended on the 5-HTTLPR genotype. Specifically, only in homozygous carriers of the 5-HTTLPR short allele did attentional bias to negative information on Week 1 significantly predict cross-semester change in dysphoria. These results carry important theoretical and practical implications concerning the ability to identify individuals vulnerable to experiencing elevated emotional reactivity to potentially stressing life-events.     

Can't suppress this feeling: automatic negative evaluations of somatosensory stimuli are related to the experience of somatic symptom distress

Cognitive theories of medically unexplained ("somatoform") symptoms stress the importance of alterations in attention and memory processes. Accordingly, specific schemata are hypothesized to (mis-)guide the processing of somatosensory stimuli leading to the formation of symptom-like perceptions. The current study tested a possible association between altered automatic somatosensory evaluation processes and the tendency to experience somatoform symptoms in a nonclinical sample. In a first pilot study, a modified version of the affect misattribution procedure (AMP) by Payne, Cheng, Govorun, and Stewart (2005) with aversive and nonaversive tactile stimuli (nonpainful electric vs. vibration stimulus) was successfully tested in 40 college students. In a second study (n = 50), automatic evaluations following aversive tactile stimuli were found to be positively associated (r = .35) with somatic symptom distress (PHQ). Moreover, negative affectivity significantly moderated this association (i.e., people high on negative affectivity revealed the strongest associations between somatic symptom distress and negative automatic evaluations in the tactile AMP). The findings support cognitive theories of somatoform symptom formation. The tactile AMP is suggested as a promising paradigm to study automatic evaluations of body sensations in people with somatoform disorders and related clinical conditions.     

A test for psychometric function shift

A nonparametric, small-sample-size test for the homogeneity of two psychometric functions against the left- and right-shift alternatives has been developed. The test is designed to determine whether it is safe to amalgamate psychometric functions obtained in different experimental sessions. The sum of the lower and upper p-values of the exact (conditional) Fisher test for several 2 × 2 contingency tables (one for each point of the psychometric function) is employed as the test statistic. The probability distribution of the statistic under the null (homogeneity) hypothesis is evaluated to obtain corresponding p-values. Power functions of the test have been computed by randomly generating samples from Weibull psychometric functions. The test is free of any assumptions about the shape of the psychometric function; it requires only that all observations are statistically independent.     

The Buddha And The Birch Tree: The Great Pine Forest Monastery And The Localization Of Vietnamese Buddhism To Canada

The Great Pine Forest Monastery was established in the Laurentian Mountains, north of Montreal, by the Union of Vietnamese Buddhist Churches in Canada in 1988. Its establishment represented, in the minds of the founders, the localization of Vietnamese Buddhism to Canadian soil. The process has, however, been a difficult one and the new acting leader of the monastery is not always optimistic that Buddhism can flourish in Canada, with particular concerns about second and third generation Vietnamese Canadians. This paper will look at the difficult navigation between tradition and adaptation that this Vietnamese Buddhist organization is undergoing, with a particular focus on the obstacles that have emerged for the development of a monastic sangha in Canada.     

Construction Of Reality Or Dependent Origination? From Scientific Psychotherapy To Responsible Attention

The term ‘postmodernism’ has carved itself a niche in everyday, and specialised, vocabulary. We understand it as being the new mentality that emerges from the critique of modernity. This transformation, which has been underway since the second half of the twentieth century, undermines the foremost myth of the modern world, that we can discover an objective and stable truth, that is to say independent and lasting. This change is affecting all areas of human knowledge, from philosophy to physics, as well as human practices and experiences. Its origins are to be found in the theories that label themselves critical, starting with Marxism and existentialism, and in further developments such as hermeneutics, symbolic interactionism, post-structuralism, ethnomethodology, deconstructionism, and others. In this article we wish to recover one of the principal ideas of this change of mentality, the idea of ‘construction of reality’ and contrast it with ‘dependent origination’ (Paticcasamuppada) characteristic of the Dharma, a system of liberation from suffering synthesised by Buddha. We are interested in this relationship in the specific field of Psychotherapy, or in the broader field of Integral Psychology. To this end, firstly we inquire how constructivism has made a space for itself in the scientific world; we then address the constructivist features of the Dharma.     

Precursors and Underlying Processes of Adolescents' Online Self-Disclosure: Developing and Testing an “Internet-Attribute-Perception” Model

This study developed and tested an “Internet-attribute-perception” model that explains how self-disclosure develops in instant messaging (IM) interactions. Following hyperpersonal communication theory, two attributes of computer-mediated communication (i.e., reduced nonverbal cues and controllability) were assumed to be responsible for increased online self-disclosure in IM. However, our model posed that any actual effects of these attributes would depend on users' perceptions of the relevance of these attributes. Furthermore, our model posed that these perceptions would mediate the relationship between personality characteristics (i.e., pri vate and public self-consciousness, and social anxiety) and online self-disclosure. Using structural equation modeling on a sample of 1,203 Dutch adolescents, we found that adolescents' perceptions of the relevance of reduced nonverbal cues and controllability encouraged their feelings of disinhibition, which in turn increased their online self-disclosure. As expected, private and public self-consciousness and social anxiety stimulated adolescents' perceptions of the relevance of reduced nonverbal cues and controllability, but did not directly influence online self-disclosure. The study shows the vital role of users' perceptions of CMC attributes in Internet-effects research.     

The influence of aging on poststroke depression using a rat model via middle cerebral artery occlusion

Poststroke depression (PSD) is the most frequent psychological sequela following stroke. While previous studies describe the impact of age on brain infarct volume, brain edema, and blood–brain barrier (BBB) breakdown following ischemia, the role of age on PSD has yet to be described. Here, we examine the influence of age on PSD progression in a rat model of PSD by middle cerebral artery occlusion (MCAO). One hundred forty-three rats were divided into three groups. 48 rats 20 weeks of age underwent a sham procedure, 51 rats 20 weeks of age had MCAO, and 44 rats 22–26 months of age had MCAO. Groups were further divided into two subgroups. The first subgroup was used to measure infarct lesion volume, brain edema, and BBB breakdown at 24 h. In the second subgroup at 3 weeks after MCAO, rats were subjected to a sucrose preference test, two-way shuttle avoidance task, forced swimming test, and a brain-derived neurotrophic factor (BDNF) protein level measurement. Total and striatal infarct volume, brain edema, and BBB breakdown in the striatum were increased in older rats, as compared with younger rats. While both old and young rats exhibited depressive-like behaviors on each of the behavioral tests and lower BDNF levels post-MCAO, as compared with control rats, there were no differences between old and young rats. Although older rats suffered from larger infarct volumes, increased brain edema and more BBB disruption following MCAO, the lack of behavioral differences between young and old rats suggests that there was no effect of rat age on the incidence of PSD.     

Implicit visual learning and the expression of learning

Although the existence of implicit motor learning is now widely accepted, the findings concerning perceptual implicit learning are ambiguous. Some researchers have observed perceptual learning whereas other authors have not. The review of the literature provides different reasons to explain this ambiguous picture, such as differences in the underlying learning processes, selective attention, or differences in the difficulty to express this knowledge. In three experiments, we investigated implicit visual learning within the original serial reaction time task. We used different response devices (keyboard vs. mouse) in order to manipulate selective attention towards response dimensions. Results showed that visual and motor sequence learning differed in terms of RT-benefits, but not in terms of the amount of knowledge assessed after training. Furthermore, visual sequence learning was modulated by selective attention. However, the findings of all three experiments suggest that selective attention did not alter implicit but rather explicit learning processes.