Glucocorticoids enhance taste aversion memory via actions in the insular cortex and basolateral amygdala

It is well established that glucocorticoid hormones strengthen the consolidation of hippocampus-dependent spatial and contextual memory. The present experiments investigated glucocorticoid effects on the long-term formation of conditioned taste aversion (CTA), an associative learning task that does not depend critically on hippocampal function. Corticosterone (1.0 or 3.0 mg/kg) administered subcutaneously to male Sprague–Dawley rats immediately after the pairing of saccharin consumption with the visceral malaise-inducing agent lithium chloride (LiCl) dose-dependently increased aversion to the saccharin taste on a 96-h retention test trial. In a second experiment, rats received corticosterone either immediately after saccharin consumption or after the LiCl injection, when both stimuli were separated by a 3-h time interval, to investigate whether corticosterone enhances memory of the gustatory or visceral stimulus presentation. Consistent with the finding that the LiCl injection, but not saccharin consumption, increases endogenous corticosterone levels, corticosterone selectively enhanced CTA memory when administered after the LiCl injection. Suppression of this training-induced release of corticosterone with the synthesis-inhibitor metyrapone (35 mg/kg) impaired CTA memory, and was dose-dependently reversed by post-training supplementation of corticosterone. Moreover, direct post-training infusions of corticosterone into the insular cortex or basolateral complex of the amygdala, two brain regions that are critically involved in the acquisition and consolidation of CTA, also enhanced CTA retention, whereas post-training infusions into the dorsal hippocampus were ineffective. These findings provide evidence that glucocorticoid effects on memory consolidation are not limited to hippocampus-dependent spatial/contextual information, but that these hormones also modulate memory consolidation of discrete-cue associative learning via actions in other brain regions.     

Social comparison with friends versus non‐friends

This paper investigates whether several aspects of social comparison in school classes differ as a function of the type of relation between the student and his or her target. Participants were 9612 students in the first grade of secondary education in the Netherlands (equivalent to Grade 7 in the US). Results indicated that (1) 78% of the students who had at least one friend also compared with a friend; (2) social comparison with friends was much more often reciprocal than comparison with non‐friends; (3) preferences for upward and downward comparison were less often given by students who compared with friends than students who compared with non‐friends; (4) the similarity in initial performance level between students and their comparison targets was higher when targets were friends; (5) despite these differences, which seem to imply that friends often serve as routine standards whereas non‐friends are more deliberately chosen as comparison targets, it appeared that consequences of social comparison for subsequent performance were about the same for both types of relations. Further findings of this paper suggest that previously found effects of friends' grades on subsequent performance may be explained by social comparison. Copyright © 2007 John Wiley & Sons, Ltd.     

Semantic interference and associative facilitation from words presented in rapid serial visual presentation

Semantic interference in picture naming is readily obtained when categorically related distractor words are displayed with picture targets; however, this is not typically the case when both primes and targets are words. Researchers have argued that to obtain semantic interference for word primes and targets, the prime must be shown for a sufficient duration, prime processing must be made difficult, and participants must attend to the primes. In this article, we used a novel procedure for prime presentation to investigate semantic interference in word naming. Primes were presented as the last word of a rapid serial visual presentation stream, with the target following 600-1,200 msec later. Semantic interference was observed for categorically related targets, whereas facilitation was found for associatively related targets.     

Unreliable Bodies: A Follow‐up Twenty Years Later by a Mother and Daughter about the Impact of Illness and Disability on their Lives

We are a mother and daughter, both health care professionals, who offer a follow‐up to an article we published twenty years ago about the impact of each other's ongoing, serious medical problems on our relationship. In this article, we contribute a long‐term perspective on the differences between having an illness that is well or poorly understood by medical professionals and the lay community. We also discuss health in the context of identity formation and life stage, as during this interval the daughter left home, graduated college, married, and had two children. Also in this period, the mother survived a third breast cancer and other life‐threatening illnesses. We discuss the impact of these experiences on each other and in other important relationships in our lives. Current discourses on daughters of breast cancer survivors do not fit our experience and we speculate about why our story differs. We find that although we continue to contend with serious medical issues that impact our own, each other's, and our families' lives, nonetheless, our lives are rich, rewarding, and “appropriate” for our life stage. That is the news.     

Generalization of the disruptive effects of alternative stimuli when combined with target stimuli in extinction

Differential‐reinforcement treatments reduce target problem behavior in the short term but at the expense of making it more persistent long term. Basic and translational research based on behavioral momentum theory suggests that combining features of stimuli governing an alternative response with the stimuli governing target responding could make target responding less persistent. However, changes to the alternative stimulus context when combining alternative and target stimuli could diminish the effectiveness of the alternative stimulus in reducing target responding. In an animal model with pigeons, the present study reinforced responding in the presence of target and alternative stimuli. When combining the alternative and target stimuli during extinction, we altered the alternative stimulus through changes in line orientation. We found that (1) combining alternative and target stimuli in extinction more effectively decreased target responding than presenting the target stimulus on its own; (2) combining these stimuli was more effective in decreasing target responding trained with lower reinforcement rates; and (3) changing the alternative stimulus reduced its effectiveness when it was combined with the target stimulus. Therefore, changing alternative stimuli (e.g., therapist, clinical setting) during behavioral treatments that combine alternative and target stimuli could reduce the effectiveness of those treatments in disrupting problem behavior.     

Differences in psychosocial responses to pain between sufficiently and insufficiently active adults with arthritis

Objective: Adults with arthritis struggle to meet the physical activity recommendation for disease self-management. Identifying psychosocial factors that differentiate adults who meet (sufficiently active) or do not meet (insufficiently active) the recommendation is needed. This study sought to examine differences in psychosocial responses to arthritis pain among adults who were sufficiently or insufficiently active.

Design: This prospective study included adults with medically diagnosed arthritis (N = 136, M_age = 49.75 ± 13.88 years) who completed two online surveys: (1) baseline: pain and psychosocial responses to pain and (2) two weeks later: physical activity.

Main outcome measures: Psychosocial responses examined in this study were psychological flexibility in response to pain, pain anxiety and maladaptive responses to pain anxiety.

Results: A between-groups MANCOVA comparing sufficiently active (n = 87) to insufficiently active (n = 49) participants on psychosocial responses, after controlling for pain intensity, was significant (p = .005). Follow-up ANOVA’s revealed that sufficiently active participants reported significantly higher psychological flexibility and used maladaptive responses less often compared to insufficiently active participants (p’s < .05).

Conclusions: These findings provide preliminary insight into the psychosocial profile of adults at risk for nonadherence due to their responses to arthritis pain.     

God changes people: modes of authentication in Evangelical conversion narratives

One of the distinguishing characteristics of Evangelicalism is the conversion story. In this article we focus on the conversion stories of interviewees within the setting of several related Evangelical television programs broadcast in the Netherlands since the 1980s. We argue that the conversion story is construed through a particular view on and practice of authenticity. Thus we see that, in the televised conversion story, modes of authentication are at work in what we analytically distinguish as frames, narratives, and strategies of authentication. We argue that the idea of an authentic transformation has changed from a more fundamentalist mode of authentication, emphasizing the subjection of the self to a particular religious narrative, to a more expressive mode of authentication that emphasizes the exploration of the inner, unique self of the interviewee.     

Phonological encoding is not contingent on semantic feature retrieval: an electrophysiological study on object naming

In the present study, the authors examined with event-related brain potentials whether phonological encoding in picture naming is mediated by basic semantic feature retrieval or proceeds independently. In a manual 2-choice go/no-go task the choice response depended on a semantic classification (animal vs. object) and the execution decision was contingent on a classification of name phonology (vowel vs. consonant). The introduction of a semantic task mixing procedure allowed for selectively manipulating the speed of semantic feature retrieval. Serial and parallel models were tested on the basis of their differential predictions for the effect of this manipulation on the lateralized readiness potential and N200 component. The findings indicate that phonological code retrieval is not strictly contingent on prior basic semantic feature processing.     

Experimental evidence for spatial learning in cuttlefish (Sepia officinalis)

Laboratory mazes were used to study spatial-learning capabilities in cuttlefish (Sepia offcinalis), using escape for reinforcement. In preliminary observations, cuttlefish in an artificial pond moved actively around the environment and appeared to learn about features of their environment. In laboratory experiments, cuttlefish exited a simple alley maze more quickly with experience and retained the learned information. Similar improvement was not found in open-field mazes or T mazes, perhaps because of motor problems. Cuttlefish learned to exit a maze that required them to find openings in a vertical wall. The wall maze was modified to an arena, and simultaneous discrimination learning and reversal learning were demonstrated. These experiments indicate that cuttlefish improve performance over serial reversals of a simultaneous, visual-spatial discrimination problem.