Language production and comprehension in an adult with ACoA syndrome

This study explored the prediction that cases with anterior communicating artery (ACoA) syndrome will exhibit deficits in higher-level language production and comprehension. A 65-year-old adult male with a history of ACoA syndrome was tested on higher-level linguistic tasks. The patient's performance on discourse comprehension. discourse production, and linguistic ambiguity comprehension tasks was impaired.     

K-ABC simultaneous processing, DAS nonverbal reasoning, and Horn's expanded fluid-crystallized theory.

Horn's distinction between--fluid intelligence (Gf) and visualization (Gv) was investigated with two Nonverbal Reasoning subtests from the Differential Ability Scales and three Simultaneous Processing subtests from the Kaufman Assessment Battery for Children. The sample comprised a predominantly Euro-American groups of 57 normal boys and girls between the ages of 6 and 12 years. Principal factor analysis yielded clear-cut Gf and Gv dimensions. The Gf factor was composed both of Differential Ability Scales and Kaufman-ABC subtests, suggesting that the construct of simultaneous processing is not merely a measure of Gv, as researchers have hypothesized, but also measures Horn's Gf fluid intelligence to a considerable extent.     

Darwin, Social Theory, and the Sociology of Scientific Knowledge

This essay considers ways in which Darwin's account of natural processes was influenced by economic, ethical, and natural-theological theories in his own day. It argues that the Anabaptist concept of "the gospel of all creatures" calls into question alliances between evolutionary theory and social policy that are based on the dominance of conflictual images such as "the survival of the fittest" and questions the negative images of both nature and God that Darwinism has been taken to sponsor. The essay also considers developments in biology that have called into question dualist accounts of human nature as body and soul, thus reminding us that we are fully a part of the natural world and thus contributing, in turn, to a better theological grasp of God's relation to nature.     

Induction with cross-classified categories

One of the main functions of categories is to allow inferences about new objects. However, most objects are cross-classified, and it is not known whether and how people combine information from these different categories in making inferences. In six experiments, food categories, which are strongly crossclassified (e.g., a bagel is both a bread and a breakfast food), were studied. For each food, the subjects were told fictitious facts (e.g., 75% of breads are subject to spoilage from Aspergillus molds) about two of the categories to which it belonged and then were asked to make an inference about the food (e.g., how likely is a bagel to be subject to spoilage from Aspergillus molds?). We found no more use of multiple categories in these cases of cross-classification than in ambiguous classification, in which it is uncertain to which category an item belongs. However, some procedural manipulations did markedly increase the use of both categories in inferences, primarily those that focused the subjects’ attention on the critical feature in both categories.     

The Effects of Leader and Subordinate Characteristics in the Development of Leader–Member Exchange Quality1

This study investigated the contribution of both subordinate and leader characteristics in the development of leader-member exchange (LMX) quality. Data from 56 subordinate-superior dyads working at a large West-coast media company revealed that subordinates high in work self-efficacy were liked more by their supervisors, perceived to be more similar to their supervisors, experienced more positive LMX quality, and were rated as better performers than subordinates low in self-efficacy. Previous job experience, was related only to one outcome; supervisor's liking of the subordinate. Subordinates initially low in self-efficacy benefited from high LMX, as evidenced by increased end-of-program self-efficacy. Perceptions of similarity between supervisor and subordinate were found to be more important to LMX quality than actual demographic similarity. Leader self-efficacy and optimism predicted subordinates' ratings of LMX quality only for female supervisors. Unexpectedly, leader self-efficacy and optimism were related to the leaders' own ratings of LMX and subordinate performance.     

Perceptual Load Induces Inattentional Blindness in Drivers

Perceptual load theory states that the level of perceptual load in a task predicts the processing of task‐irrelevant information. High perceptual load has been shown to result in increased inattentional blindness; however, there is little evidence that this extends beyond artificial computer‐based tasks to real‐world behavior. In this study, we adapted a typical load‐blindness paradigm for use in a driving simulator. Forty‐two drivers performed a series of gap perception tasks where they judged if their vehicle could fit between two parked vehicles, with the task imposing either low or high perceptual load. Awareness for an unexpected pedestrian or animal at the side of the road was found to be significantly lower in the high perceptual load condition. This study is the first to demonstrate perceptual load effects on awareness in an applied setting and has important implications for road safety and future applied research on the perceptual load model.Copyright © 2016 John Wiley & Sons, Ltd.     

Age differences in overlapping-task performance: evidence for efficient parallel processing in older adults

Two psychological refractory period (PRP) experiments were conducted to examine overlapping processing in younger and older adults. A shape discrimination task (triangle or rectangle) for Task 1 (T1) and a lexical-decision task (word or nonword) for Task 2 (T2) were used. PRP effects, response time for T2 increasing as stimulus onset synchrony (SOA) decreased, were obtained for both age groups. The effect of word frequency on T2 was smaller at the short SOA than at the long SOA, reflecting slack effects, which were larger for older than younger adults in both experiments. These results suggest that older adults can perform lexical access of T2 in parallel with the processing of T1 at least as efficiently as younger adults.