Different types of working memory binding in epilepsy patients with unilateral anterior temporal lobectomy

The medial temporal lobe is an important structure for long-term memory formation, but its role in working memory is less clear. Recent studies have shown hippocampal involvement during working memory tasks requiring binding of information. It is yet unclear whether this is limited to tasks containing spatial features. The present study contrasted three binding conditions and one single-item condition in patients with unilateral anterior temporal lobectomy.A group of 43 patients with temporal lobectomy (23 left; 20 right) and 20 matched controls were examined with a working memory task assessing spatial relational binding (object–location), non-spatial relational binding (object–object), conjunctive binding (object–colour) and working memory for single items. We varied the delay period (3 or 6 s), as there is evidence showing that delay length may modulate working memory performance.The results indicate that performance was worse for patients than for controls in both relational binding conditions, whereas patients were unimpaired in conjunctive binding. Single-item memory was found to be marginally impaired, due to a deficit on long-delay trials only.In conclusion, working memory binding deficits are found in patients with unilateral anterior temporal lobectomy. The role of the medial temporal lobe in working memory is not limited to tasks containing spatial features. Rather, it seems to be involved in relational binding, but not in conjunctive binding. The medial temporal lobe gets involved when working memory capacity does not suffice, for example when relations have to be maintained or when the delay period is long.     

Deciphering Subjective Trajectories for Life Satisfaction Using Self‐versus‐Normative Other Discrepancies,Self‐esteem and Hope

Drawing on temporal and social comparison perspectives, we examined sources of the widespread belief that life gets better and better over time by determining how young adults evaluate their past, present and anticipated future life satisfaction (LS) relative to beliefs about normative others. We assessed whether patterns of subjective LS trajectories based on self‐versus‐normative other discrepancies varied as a function of self‐esteem and whether such patterns were accounted for by hope, encompassing goal‐related cognitions and motivations. University participants (n = 394) completed measures of their own and normative others' past, present and anticipated future LS, as well as self‐esteem and hope scales. Results from latent growth curve analyses demonstrated that high‐self‐esteem and low‐self‐esteem individuals perceived normative others' LS as progressing on a similar upward subjective temporal trajectory; however, high‐self‐esteem individuals perceived self‐improvement from past to present LS and self‐consistency from present to future LS relative to others. Low‐self‐esteem individuals perceived self‐consistency from past to present LS and self‐improvement from present to future LS relative to others. These associations were accounted for by hope. This research highlights the utility of combining temporal and social comparison perspectives for understanding how people envision their LS unfolding over time. Copyright © 2012 John Wiley & Sons, Ltd.     

High Level of Construal and Psychological Distance Reduce Melioration

We examined how level of construal and psychological distance affected performance in a task in which value of alternatives depended on frequency of choice. Melioration, a sub‐optimal choice strategy that fails to take into account such value changes, has been found to be prevalent and difficult to change. Participants repeatedly chose between two buttons to earn as many coins as possible. Button A earned N coins, button B earned N + 3 coins, and N was the number of A presses in the last five trials. In this situation, B has a higher immediate payoff, but because choosing A increases the return from both buttons for the next five trials, maximizing A choices is the optimal strategy. We predicted that because a global perspective is needed to appreciate the dependency of value on frequency of choice, frequency of choosing the globally maximizing alternative (A) would increase when participants apply a higher level of construal and assume a more psychologically distal perspective. Study 1 manipulated construal level through segmenting the sequence of trials into segments of different size, with bigger segments representing higher level of construal. In Study 2, participants played a practice game, and we manipulated the probability of playing the actual game. Both a higher level of construal and a lower probability of playing the actual game (higher distance) increased the number of A choices. These results suggest that a broad perspective that is induced by high level of construal or by psychological distancing may reduce sub‐optimal, meliorating choice. Copyright © 2014 John Wiley & Sons, Ltd.     

Eye movements during mental time travel follow a diagonal line

Recent research showed that past events are associated with the back and left side, whereas future events are associated with the front and right side of space. These spatial–temporal associations have an impact on our sensorimotor system: thinking about one’s past and future leads to subtle body sways in the sagittal dimension of space (Miles, Nind, & Macrae, 2010). In this study we investigated whether mental time travel leads to sensorimotor correlates in the horizontal dimension of space. Participants were asked to mentally displace themselves into the past or future while measuring their spontaneous eye movements on a blank screen. Eye gaze was directed more rightward and upward when thinking about the future than when thinking about the past. Our results provide further insight into the spatial nature of temporal thoughts, and show that not only body, but also eye movements follow a (diagonal) “time line” during mental time travel.     

It is about time: Daily relationships between temporal perspective and well-being

This study examined the day-to-day relationships between temporal perspective and well-being. Temporal perspective has predominantly been measured with single-occasion measurement designs, which ignore the potential for within-person variations that may be important in accounting for fluctuations in well-being. A 14-day daily diary design was employed to examine the dimensions of temporal perspective (temporal focus, temporal attitude, and temporal distance) and their dynamic relationships with daily well-being. The results from multilevel analyses indicated that: (a) there is evidence of within-person variability in daily temporal perspective, and (b) this within-person variability in temporal perspective fluctuated systematically with fluctuations in daily well-being. Each temporal perspective dimension was useful in predicting daily well-being. Temporal perspective dimensions interacted with each other such that the daily relationships with well-being depended on both the temporal region (past, present, or future) and the nature of the thoughts (pleasant vs. unpleasant; near vs. far).     

Calling the beautiful game ugly: A response to Davis

In a previous article (Kretchmar 2005 Kretchmar, S. 2005. Game flaws. Journal of the Philosophy of Sport, XXXII(1): 36–48.  [Google Scholar]), I identified problems in a certain species of games and traced these harms to something I called a ‘game flaw’. Unfortunately, ‘the beautiful game’ is a member of that species. I say it is unfortunate because Paul Davis (2006 Davis, P. 2006. Game strengths. Journal of the Philosophy of Sport, XXXIII(1): 50–66.  [Google Scholar]), when taking me to task for providing an argument that, in his terms, was ‘not especially compelling’, focused on the game of soccer (hereafter, football). The issue over which we contended is one of ‘time management’– that is, how game initiation, duration and closure are structured. I suggest that two basic methods for managing such requirements are available. Games take place during a stipulated amount of time or for a specified number of events. In my original article, I identified four fundamental problems that may accompany time-regulated games. In this essay, I attempt to fortify those claims against Davis's criticisms.     

Neuronal effects of auditory distraction on visual attention

Selective attention in the presence of distraction is a key aspect of healthy cognition. The underlying neurobiological processes, have not, however, been functionally well characterized. In the present study, we used functional magnetic resonance imaging to determine how ecologically relevant distracting noise affects cortical activity in 27 healthy adults during two versions of the visual Sustained Attention To Response Task (SART) that differ in difficulty (and thus attentional load). A significant condition (noise or silence) by task (easy or difficult) interaction was observed in several areas, including dorsolateral prefrontal cortex (DLPFC), fusiform gyrus (FG), posterior cingulate (PCC), and pre-supplementary motor area (PreSMA). Post hoc analyses of interaction effects revealed deactivation of DLPFC, PCC, and PreSMA during distracting noise under conditions of low attentional load, and activation of FG and PCC during distracting noise under conditions of high attentional load. These results suggest that distracting noise may help alert subjects to task goals and reduce demands on cortical resources during tasks of low difficulty and attentional load. Under conditions of higher load, however, additional cognitive resources may be required in the presence of noise.     

Constructing autobiographical events within a spatial or temporal context: a comparison of two targeted episodic induction techniques

ABSTRACT

Recalling and imagining autobiographical experiences involves constructing event representations within spatiotemporal contexts. We tested whether generating autobiographical events within a primarily spatial (where the event occurred) or temporal (the sequence of actions that occurred) context affected how the associated mental representation was constructed. We leveraged the well-validated episodic specificity induction (ESI) technique, known to influence the use of episodic processes on subsequent tasks, to develop variants that selectively enhance spatial or temporal processing. We tested the effects of these inductions on the details used to describe past and future autobiographical events. We first replicated the standard ESI effect, showing that ESI enhances generating episodic details, particularly those that are perception-based, when describing autobiographical events (Experiment 1). We then directly compared the effects of the spatial and temporal inductions (Experiment 2 and 3). When describing autobiographical events, spatial induction enhanced generating episodic details, specifically perception-based details, compared to the control or temporal inductions. A greater proportion of the episodic details generated after the temporal induction were gist-based than after the spatial induction, but this proportion did not differ from a control induction. Thus, using a spatial or temporal framework for autobiographical event generation alters the associated details that are accessed.     

White matter in aphasia: A historical review of the Dejerines’ studies

The Objective was to describe the contributions of Joseph Jules Dejerine and his wife Augusta Dejerine-Klumpke to our understanding of cerebral association fiber tracts and language processing.