Accounting for cognitive aging: context processing, inhibition or processing speed?

Age-related deficits in context processing were examined in relationship to two predominant theories of cognitive aging (the Inhibitory Deficit and Processing Speed Models). Older and younger adults completed a measure of context processing (AX Continuous Performance Test (CPT) task) as well as a computerized battery of inhibitory tasks: Stroop, garden path sentences, go no-go, and the stop-signal paradigm. Participants also completed a simple processing speed task. After controlling for baseline differences in processing speed, age effects were detected on the AX-CPT. Smaller, but significant age effects were noted on the Stroop and stop-signal tasks, but no significant age effects were found on the garden path sentence and go no-go tasks. Intertask correlations were weak, providing little evidence for a homogenous or uniform construct of inhibition. The sensitivity of the AX-CPT to cognitive aging is discussed in the context of existing theories of cognitive aging. The authors suggest that deficits in context processing and utilization may underlie cognitive aging phenomena.     

Covariation and quantifier polarity: what determines causal attribution in vignettes?

Tests of causal attribution often use verbal vignettes, with covariation information provided through statements quantified with natural language expressions. The effect of covariation information has typically been taken to show that set size information affects attribution. However, recent research shows that quantifiers provide information about discourse focus as well as covariation information. In the attribution literature, quantifiers are used to depict covariation, but they confound quantity and focus. In four experiments, we show that focus explains all (Experiment 1) or some (Experiment 2-4) of the impact of covariation information on the attributions made, confirming the importance of the confound. Attribution experiments using vignettes that present covariation information with natural language quantifiers may overestimate the impact of set size information, and ignore the impact of quantifier-induced focus.     

Context processing and context maintenance in healthy aging and early stage dementia of the Alzheimer's type

Declines in the ability to process context information may represent a fundamental mechanism of age-related cognitive changes. Two components of context processing--activation/updating and maintenance--were examined in a sample of healthy younger and older adults, along with individuals suffering from early stage dementia of the Alzheimer's type (DAT). All older adult groups showed context activation/updating impairments, whereas context maintenance was only impaired in the oldest adults (age>75 years) and was further exacerbated in DAT individuals. The results suggest that context processing may be composed of functionally dissociable components and point to the utility of this construct in understanding the timecourse of cognitive decline in healthy and pathological aging.     

The influence of types of character on processing background information in narrative discourse

The background sentenceThe air was cold and clammy depicts setting information which may or may not be of significance to a given character in a narrative. We tested the hypothesis that such information is processed with respect to the main character in a narrative rather than with respect to a secondary character. In Experiment 1, subjects making attributions of awareness of such background states were more likely to attribute such awareness to main than to secondary characters. In Experiment 2, using self-paced reading, we showed that such information is more important for main than for secondary characters during reading. Thus, unattached background information is processed with respect to main characters. This bias provides a source of control over the processing necessary to establish a coherent representation during the reading of narratives. Experiment 3 eliminated the possibility that the effects were due to generally shallower processing of sentences centered on secondary characters.     

Distortion in control attributions for real life events

A pool of life events was prerated as either positive or negative and likely or unlikely to recur. Undergraduate subjects then rated their control over their own life events and the average student's control over his/her life events. As predicted, subjects self-attributed more control over positive than negative events and self-attributed more control than they attributed control to others for positive events. However, self-attributions and attributions to others of control for negative events did not differ. Results thus provided support for self-enhancement but not for self-protection. It was also predicted that control motivation would lead subjects to (a) self-attribute more control for recurrent than nonrecurrent events, (b) self-attribute more control than they attribute to others over all events, and (c) self-attribute more control than they attribute to others for recurrent but not nonrecurrent events. The first and second of these predictions were confirmed, providing support for the operation of control motivation on real life events.     

Speed of information processing in academically gifted youths

A group of bright-average 7th grade junior-high-school students was contrasted with a group of manifestly academically gifted students of comparable age who were taking college-level courses in mathematics and science. The groups differed significantly and markedly (showing an overall mean difference of 1.34 SD) on every one of the nine different reaction-time (RT) tasks measuring the speed with which persons perform various elementary cognitive processes. The results indicate that: (1) various RT measurements discriminate about as much between intellectually average and superior groups as past studies have found RT measurements to discriminate between average and subnormal groups: and (2) the academically gifted differ from their nongifted age-peers in more than just scholastic knowledge and advanced problem-solving skills—they differ fundamentally in speed of information processing on extremely simple cognitive tasks with average response latencies of between 0.3 and 1.5 sec.     

Two models of brief group psychotherapy for herpes sufferers

The psychological consequences that often follow from contracting genital herpes fall into four general categories: sexual functioning, interpersonal relations, emotional life, and self-esteem. After detailing these, a rationale for treating genital herpes sufferers in group is offered, and then two models for the time-limited group treatment of this population are described. The first is a cognitive behavioral stress management program which has three component parts: relaxation training, rational-emotive training, and assertiveness training. The second is a dynamically oriented group in which the group focus shifts over time from the difficulties associated with the disease itself to general exploration of interpersonal styles and themes. Some comparisons between the two models are drawn.     

The metasemantics of memory

In Sven Bernecker’s excellent new book, Memory, he proposes an account of what we might call the “metasemantics” of memory: the conditions that determine the contents of the mental representations employed in memory. Bernecker endorses a “pastist externalist” view, according to which the content of a memory-constituting representation is fixed, in part, by the “external” conditions prevalent at the (past) time of the tokening of the original representation (the one from which the memory-constituting one is causally derived). Bernecker argues that the best version of a pastist externalism about memory contents will have the result that there can be semantically-induced memory losses in cases involving unwitting “world-switching”. The burden of this paper is to show that Bernecker’s argument for this conclusion does not succeed. My arguments on this score have implications for our picture of mind-world relations, as these are reflected in a subject’s attempts to recall her past thoughts.     

Socio-functional foundations in science: The case of measurement

We present a novel kind of “socio-functional” foundationalism rooted in the division of scientific labor. Our foundationalism is social in that it involves a socio-epistemic phenomenon we dub epistemic outsourcing, whereby claims from one group of scientists provide epistemological foundations for another group of scientists. We argue that: (1) epistemic outsourcing results in a legitimate form of epistemic foundationalism, (2) this sort of foundationalism can be used to shed light on the epistemology of measurement; and (3) epistemic outsourcing is a distinctively collective epistemic phenomenon.     

INTERPERSONAL EPISTEMIC ENTITLEMENTS

In this paper I argue that the nature of our epistemic entitlement to rely on certain belief‐forming processes—perception, memory, reasoning, and perhaps others—is not restricted to one's own belief‐forming processes. I argue as well that we can have access to the outputs of others’ processes, in the form of their assertions. These two points support the conclusion that epistemic entitlements are “interpersonal.” I then proceed to argue that this opens the way for a non‐standard version of anti‐reductionism in the epistemology of testimony, and a more “extended” epistemology—one that calls into question the epistemic significance that has traditionally been ascribed to the boundaries separating individual subjects.