Does retrieval strategy disruption cause general and specific collaborative inhibition?

The purpose of the experiment on collaborative memory was to investigate if the collaborative inhibition is due to collaborating pair's disruption of each others' retrieval strategies (the retrieval strategy disruption hypothesis, RSD). The participants' (N = 36) task was to recall a list of 60 words individually and collaboratively. Retrieval strategies were manipulated by presenting word lists organised either by categories or by country of origin and adoption of retrieval strategies were examined by the adjusted ratio of clustering score. Half of the dyads received word lists organised by the same strategy and half of the dyads received word lists organised by different strategies. The results revealed a main effect of collaboration, i.e., collaborative recalled items were significantly fewer than the sum of the non-redundant individually recalled items. Both conditions (same strategies vs different strategies) suffered to the same extent from collaboration, which did not support the RSD hypothesis. However, focusing on words recalled individually but not collaboratively, dyads with different strategies, as predicted by the RSD, forgot more items during collaboration than did dyads with the same strategy. Additional results suggest that collaborative forgetting is mainly manifested by forgetting of non-overlapping items (as measured by individual recalls).     

Time-driven effects on parsing during reading

The phonological trace of perceived words starts fading away in short-term memory after a few seconds. Spoken utterances are usually 2-3 s long, possibly to allow the listener to parse the words into coherent prosodic phrases while they still have a clear representation. Results from this brain potential study suggest that even during silent reading, words are organized into 2-3 s long ‘implicit’ prosodic phrases. Participants read the same sentences word by word at different presentation rates. Clause-final words occurring at multiples of 2-3 s from sentence onset yielded increased positivity, irrespective of presentation rate. The effect was interpreted as a closure positive shift (CPS), reflecting insertion of implicit prosodic phrase boundaries every 2-3 s. Additionally, in participants with low working memory span, clauses over 3 s long produced a negativity, possibly indicating increased working memory load.     

Relationships Between Locus of Control, Coping Strategies and Emotional Well-Being in Persons with Spinal Cord Lesion

Relations between locus of control, coping strategies and emotional well-being in persons with traumatically acquired spinal cord lesion (SCL) were examined. The sample included 132 community-residing adults. Structural equation modelling, including confirmatory factor analysis, was used. A model was hypothesized based on the transactional theory of stress and coping where coping strategies mediated the relation between locus of control and emotional well-being. The model showed acceptable fit to the data and was compared with five alternative models. The alternative models fitted the data less well or were difficult to interpret. In the preferred model, persons indicating internal control reported more coping strategies (Acceptance, Fighting spirit) related to increased well-being, whereas persons indicating external control reported a coping strategy (Social reliance) related to poorer well-being. The findings support the stress and coping framework in medical rehabilitation and illustrate why some persons need coping effectiveness training to enhance emotional adjustment.     

Assortative marriage and the familiality of cognitive abilities in families of extremely gifted students

The top 1% of the extremely bright students identified by the Study of Mathematically Precocious Youth (Benbow & Stanley, 1980b) were tested along with their parents, using a battery of specifically designed cognitive tests. These students represented the top 0.03% of their age group in intellectual ability. The results showed that the parents were extremely able and resembled one another significantly more than parents in the general population. In addition, the intellectually precocious children resembled their parents to a lesser extent than children of average ability resemble their parents. These results suggest that considerable assortative mating has occurred among the parents of these extremely gifted youth, but that extreme giftedness cannot be predicted reliably solely as a result of the mating of bright parents.     

FELDMAN'S JUSTICIZED ACT UTILITARIANISM

In Confrontations with the Reaper Fred Feldman puts forward puts forward an ethical theory called ‘justicized act utilitarianism’, JAU, according to which an act is morally right if and only if it maximizes universal justice level, i.e., brings it about that as many as possible get what they deserve. It is here argued that JAU is exposed to objections under the force of which it either loses its special emphasis on justice or its utilitarian character. It is also contended that, contrary to what Feldman suggests, JAU does not deal more plausibly with procreation and abortion than do more familiar forms of utilitarianism. Rather, it deals less plausibly at least with abortion, due to difficulties in the concept of desert.     

College Students’ Attitudes Toward Blacks and Arabs Following a Terrorist Attack as a Function of Varying Levels of Media Exposure1

Attitudes toward Blacks and Arabs immediately following a terrorist attack on the United States, as well as 1 year later, were investigated. White undergraduate students completed a modified version of the Should‐Would Discrepancy Questionnaire (Monteith & Voils, 1998), assessing beliefs about what they should do in certain situations pertaining to race and what they would do in these situations. Additionally, daily self‐reported levels of news exposure were measured. The result was that the participants both believed that they should and would be more prejudiced toward Arabs than toward Blacks, at both Time 1 and Time 2. Furthermore, at Time 1, there was a trend for participants reporting high levels of daily news exposure (television, radio, Internet, and newspapers) to be more prejudiced toward Arabs than were participants who reported low levels. No effect of news exposure on attitudes toward Blacks was found at Time 1. At Time 2, however, participants reporting greater amounts of news exposure were more prejudiced toward Blacks than were participants reporting medium or low levels. Possible reasons for and implications of these findings are discussed.     

Demonstrative Induction and the Skeleton of Inference

It has been common wisdom for centuries that scientific inference cannot be deductive; if it is inference at all, it must be a distinctive kind of inductive inference. According to demonstrative theories of induction, however, important scientific inferences are not inductive in the sense of requiring ampliative inference rules at all. Rather, they are deductive inferences with sufficiently strong premises. General considerations about inferences suffice to show that there is no difference in justification between an inference construed demonstratively or ampliatively. The inductive risk may be shouldered by premises or rules, but it cannot be shirked. Demonstrative theories of induction might, nevertheless, better describe scientific practice. And there may be good methodological reasons for constructing our inferences one way rather than the other. By exploring the limits of these possible advantages, I argue that scientific inference is neither of essence deductive nor of essence inductive.     

Gaining control: training executive function and far transfer of the ability to resolve interference

Functional brain-imaging data document overlapping sites of activation in prefrontal cortex across memory tasks, suggesting that these tasks may share common executive components. We leveraged this evidence to develop a training regimen and a set of transfer tasks to examine the trainability of a putative executive-control process: interference resolution. Eight days of training on high-interference versions of three different working memory tasks increased the efficiency with which proactive interference was resolved on those particular tasks. Moreover, an improved ability to resolve interference was also transferred to different working memory, semantic memory, and episodic memory tasks, a demonstration of far-transfer effects from process-specific training. Participants trained with noninterference versions of the tasks did not exhibit transfer. We infer that the transfer we demonstrated resulted from increased efficiency of the interference-resolution process. Therefore, this aspect of executive control is plastic and adaptive, and can be improved by training.