Biomedical subjects

Lisa M Soederberg Miller

Publications and source records attributed to Lisa M Soederberg Miller.

5 recordsLinked to original sources

PubMed2006

Aging and self-regulated language processing.

An adult developmental model of self-regulated language processing (SRLP) is introduced, in which the allocation policy with which a reader engages text is driven by declines in processing capacity, growth in knowledge-based processes, and age-related shifts in reading goals. Evidence is presented to show that the individual reader's allocation policy is consistent across time and across different types of text, can serve a compensatory function in relation to abilities, and is predictive of subsequent memory performance. As such, it is an important facet of language understanding and learning from text through the adult life span.

Aging↗

PubMed2006

Physiological reactivity to cognitive stressors: variations by age and socioeconomic status.

The present study focused on age and SES differences in stress reactivity in response to cognitively challenging tasks. Specifically, we assessed within-person trajectories of cortisol, a steroid hormone released by the adrenal gland in response to stressors, before, during, and after exposure to cognitively challenging tasks. We extend the current literature by simultaneously examining age and SES differences in physiological reactivity. Findings suggest that age and SES both play an important role in reactivity, such that it was the older adults with higher SES who were the most physiologically reactive to cognitive stressors. Implications of these findings for cognitive aging research are discussed.

Adult↗

PubMed2006

Contextual knowledge reduces demands on working memory during reading.

An experiment is reported in which young, middle-aged, and older adults read and recalled ambiguous texts either with or without the topic title that supplied contextual knowledge. Within each of the age groups, the participants were divided into those with high or low working memory (WM) spans, with available WM capacity further manipulated by the presence or absence of an auditory target detection task concurrent with the reading task. Differences in reading efficiency (reading time per proposition recalled) between low WM span and high WM span groups were greater among readers who had access to contextual knowledge relative to those who did not, suggesting that contextual knowledge reduces demands on WM capacity. This position was further supported by the finding that increased age and attentional demands, two factors associated with reduced WM capacity, exaggerated the benefits of contextual knowledge on reading efficiency. The relative strengths of additional potential predictors of reading efficiency (e.g., interest, effort, and memory beliefs), along with knowledge, WM span, and age, are reported. Findings showed that contextual knowledge was the strongest predictor of reading efficiency even after controlling for the effects of all of the other predictors.

Adolescent↗

PubMed2005

Environmental support for older and younger pilots' comprehension of air traffic control information.

We investigated whether expertise mitigates age differences on pilot communication tasks when experts rely on environmental support. Pilots and nonpilots listened to air traffic control messages describing a route through an airspace, during which they referred to a chart of the airspace. The routes were high (waypoint routes anchored to navigational reference points on the chart) or low (vector routes that were not) in contextual support. Participants read back messages and answered questions about aircraft position (which required integration of message and chart information) or altitude (which did not). Pilots more accurately answered questions. The expertise advantage for position, but not altitude, questions was greater for waypoint routes, showing differential use of environmental support by experts. Age did not moderate these effects.

Adult↗

PubMed2003

The effects of age and domain knowledge on text processing.

The author investigated age differences in the effects of knowledge during encoding by comparing time allocated to naturalistic domain-related (cooking) and general texts among young and older adults with varying levels of (cooking) knowledge. High-knowledge individuals increased time allocated to conceptual integration when reading domain-related texts but not general texts and showed relatively greater recall for domain-related texts. These findings suggest that knowledge application can be effortful during encoding and that this effort pays off in terms of a more elaborated and integrated text representation that engenders better memory performance. There were no age differences in effects of knowledge on either resource allocation at encoding or on memory performance. These results suggest that knowledge-based processing is preserved in later life.

Adult↗