The influence of cognitive load on spatial search performance

During search, executive function enables individuals to direct attention to potential targets, remember locations visited, and inhibit distracting information. In the present study, we investigated these executive processes in large-scale search. In our tasks, participants searched a room containing an array of illuminated locations embedded in the floor. The participants’ task was to press the switches at the illuminated locations on the floor so as to locate a target that changed color when pressed. The perceptual salience of the search locations was manipulated by having some locations flashing and some static. Participants were more likely to search at flashing locations, even when they were explicitly informed that the target was equally likely to be at any location. In large-scale search, attention was captured by the perceptual salience of the flashing lights, leading to a bias to explore these targets. Despite this failure of inhibition, participants were able to restrict returns to previously visited locations, a measure of spatial memory performance. Participants were more able to inhibit exploration to flashing locations when they were not required to remember which locations had previously been visited. A concurrent digit-span memory task further disrupted inhibition during search, as did a concurrent auditory attention task. These experiments extend a load theory of attention to large-scale search, which relies on egocentric representations of space. High cognitive load on working memory leads to increased distractor interference, providing evidence for distinct roles for the executive subprocesses of memory and inhibition during large-scale search.     

Family caregivers of older relatives: ways of coping and change in distress

The aim of this secondary analysis was to examine the relationships between the ways in which caregivers coped with caregiving stressors and their experience of distress over time. Three coping subscales were derived from the Carers' Assessment of Management Index (CAMI) coping scale: "maintaining balance", "focusing on caregiving" and "avoidance". A proportional (relative) scoring technique was applied. The analysis was based on the responses of 115 pairs of caregivers and care recipients. Care recipients were aged 66-92 years, with no symptoms of dementia, and the majority had mild to moderate hearing impairment. Data were collected at baseline and 6 months later. Caregivers who increased the proportion of strategies endorsed in the "maintaining balance" subscale experienced a decrease in distress, irrespective of change in the proportion of strategies endorsed in the "avoidance" subscale. "Focusing on caregiving" was not significantly related to distress. The results highlight the potential benefits to these caregivers of maintaining a balance in their lives by taking breaks from caregiving.     

On the Advantages and Disadvantages of Reading Heidegger Backwards: White's Time and Death ∗

In Time and Death: Heidegger's Analysis of Finitude, Carol White pursues a strange hermeneutic strategy, reading Heidegger backwards by reading the central ideas of his later work back into his early magnum opus, Being and Time. White follows some of Heidegger's own later directives in pursuing this hermeneutic strategy, and this paper critically explores these directives along with the original reading that emerges from following them. The conclusion reached is that White's creative book is not persuasive as a strict interpretation of Heidegger's early work, but remains extremely helpful for deepening our appreciation of Heidegger's thought as a whole. Most importantly, White helps us to understand the pivotal role that thinking about death played in the lifelong development of Heidegger's philosophy.     

Can third-party observers detect the emotional rewards of generous spending?

Can others detect the emotional consequences of our personal choices? Here, we investigate whether third-party observers can detect the emotional benefits of two factors shown to influence self-reported happiness: the speed with which people make decisions and the generosity of spending choices. Participants were randomly assigned to purchase a goody bag either for themselves or for a sick child, and to choose the contents of this goody bag either as quickly as possible, or by taking as much time as needed. Then, participants reported their current emotional state and were rated for happiness by a research assistant blind to their spending condition. Analyses revealed that purchasing a gift for someone else not only improved participants’ self-reported mood, but that observers could detect these affective differences as well. Observers also rated participants who made their spending decision more quickly as happier, although participants did not report these emotional differences.