Reading Stories Activates Neural Representations of Visual and Motor Experiences

ABSTRACT— To understand and remember stories, readers integrate their knowledge of the world with information in the text. Here we present functional neuroimaging evidence that neural systems track changes in the situation described by a story. Different brain regions track different aspects of a story, such as a character's physical location or current goals. Some of these regions mirror those involved when people perform, imagine, or observe similar real-world activities. These results support the view that readers understand a story by simulating the events in the story world and updating their simulation when features of that world change.     

Age changes in processing speed as a leading indicator of cognitive aging

Bivariate dual change score models were applied to longitudinal data from the Swedish Adoption/Twin Study of Aging to compare the dynamic predictions of 2-component theories of intelligence and the processing speed theory of cognitive aging. Data from up to 5 measurement occasions covering a 16-year period were available from 806 participants ranging in age from 50 to 88 years at the first measurement wave. Factors were generated to tap 4 general cognitive domains: verbal ability, spatial ability, memory, and processing speed. Model fitting indicated no dynamic relationship between verbal and spatial factors, providing no support for the hypothesis that age changes in fluid abilities drive age changes in crystallized abilities. The results suggest that, as predicted by the processing speed theory of cognitive aging, processing speed is a leading indicator of age changes in memory and spatial ability, but not verbal ability.     

A computational model of fractionated conflict-control mechanisms in task-switching

A feature of human cognition is the ability to monitor and adjust one's own behavior under changing circumstances. A dynamic balance between controlled and rapid responding is needed to adapt to a fluctuating environment. We suggest that cognitive control may include, among other things, two distinct processes. Incongruent stimuli may drive top-down facilitation of task-relevant responses to bias performance toward exploitation vs. exploration. Task or response switches may generally slow responses to bias toward accuracy vs. speed and exploration vs. exploitation. Behavioral results from a task switching study demonstrate these two distinct processes as revealed by higher-order sequential effects. A computational model implements the two conflict-control mechanisms, which allow it to capture many complex and novel sequential effects. Lesion studies with the model demonstrate that the model is unable to capture these effects without the conflict-control loops and show how each monitoring component modulates cognitive control. The results suggest numerous testable predictions regarding the neural substrates of cognitive control.     

Revised norms for the Lollipop Test for children ages 42 to 65 months

Lollipop Test scores were acquired for 1,402 preschoolers in southwestern Indiana. Means and standard deviations for both boys and girls by 6-mo. intervals from the ages of 42 through 65 months showed scores increased significantly across ages, with girls scoring significantly higher than boys in all age groups. Current mean scores are similar to those published in 1988 for boys and slightly higher for girls.     

Touched by Time: Some Critical Reflections on Derrida’s Engagement with Merleau-Ponty in Le Toucher

This essay raises some critical questions about the interpretation that Derrida offers of Merleau-Ponty in his recent book, On Touching: Jean-Luc Nancy, where Derrida implies that the latter’s work remains mired in theological prejudices. As well as defending Merleau-Ponty’s analyses of the senses and inter-subjectivity against such claims, this essay is also concerned to examine Derrida’s transcendental philosophy of time (or philosophy of the contretemps that breaks open time but nonetheless pertains to it) that undergirds and motivates his engagement with various philosophies of touch. In this latter respect, I will argue that Derrida’s philosophy is itself ‘touched’ by time, in the peculiar sense of ‘touched’ that connotes affected and wounded. His work instantiates an ethics of non-presentist time (which is also the transcendental condition for any event of touch) and I ask whether there is reason to look for a different understanding of both time and the transcendental to Derrida’s.