Aging affects both perceptual and lexical/semantic components of word stem priming: An event-related fMRI study

In this event-related fMRI study, brain activity patterns were compared in extensive groups of young (N=25) and older (N=38) adults, while they were performing a word stem completion priming task. Based on behavioral findings, we tested the hypothesis that aging affects only the lexical/semantic, but not the perceptual component of word stem priming. To this end, we distinguished between priming-related activity reductions in posterior regions involved in visual processing, and regions associated with lexical/semantic retrieval processes, i.e., left lateral temporal and left prefrontal regions. Both groups revealed significant priming-related response time reductions. However, in accordance with earlier findings, a larger priming effect was found in the group of young participants. In line with previous imaging studies, the groups showed common priming-related activity reductions in the anterior cingulate, and the left inferior prefrontal cortex extending into the anterior portion of the left superior temporal gyrus, and at lower thresholds also in the right occipital lobe. However, when directly comparing the groups, greater priming-related reductions were found for the young group in the left anterior superior temporal gyrus and the right posterior occipital lobe. These findings suggest that, converse to current psychological views, aging affects both perceptual and lexical/semantic components of repetition priming.     

Innovation across cultures: Connecting leadership,identification, and creative behavior in organizations

Innovation is considered essential for today's organizations to survive and thrive. Researchers have also stressed the importance of leadership as a driver of followers' innovative work behavior (FIB). Yet, despite a large amount of research, three areas remain understudied: (a) The relative importance of different forms of leadership for FIB; (b) the mechanisms through which leadership impacts FIB; and (c) the degree to which relationships between leadership and FIB are generalizable across cultures. To address these lacunae, we propose an integrated model connecting four types of positive leadership behaviors, two types of identification (as mediating variables), and FIB. We tested our model in a global data set comprising responses of N = 7,225 participants from 23 countries, grouped into nine cultural clusters. Our results indicate that perceived LMX quality was the strongest relative predictor of FIB. Furthermore, the relationships between both perceived LMX quality and identity leadership with FIB were mediated by social identification. The indirect effect of LMX on FIB via social identification was stable across clusters, whereas the indirect effects of the other forms of leadership on FIB via social identification were stronger in countries high versus low on collectivism. Power distance did not influence the relations.     

Hobby horses in Lascaux — On pictures and semiosis

This contribution is about semiology and art history. More specifically, it argues against the frequent claims that art history ought to take much more notice of semiology than it has tended to do so far. The argument against these claims is simple and basic: art history deals largely with images, and semiology does not — it has, in fact, little to say about them.Semiology has recently been presented as a supra-disciplinary theory that, although in practice most often applied to written texts, could equally well be applied to the art of painting. It has been considered merely a historical accident that semiotics was developed primarily in conjunction with literary texts. I do not think this is so. Semiology (or semiotics) not only has a strong anti-iconical bias, this bias was in fact one of its principles from the very beginning.Furthermore, the so-called supra-disciplinary theory of semiotics (in the form advocated for the humanities) is based upon specific views of language, signification and meaning, and these are not as evident as they are often made out to be — not even with regard to language itself. In particular the overriding importance attached to the role of arbitrariness within sign systems is questionable.In any case images are indeed in a class of their own, and without the acknowledgement of what is typical about them, it is hard to make much sense of either their use or construction — let alone of the history of art.     

The Lara Phenomenon: Powerful Female Characters in Video Games

The content of games is an understudied area in social scientific research about video games. The purpose of the present study is to contribute to the understanding of the portrayal of gender and race in games. Previous research on game content has revealed that stereotypical masculine characters dominate video games and that those characters are generally White. Nowadays, quite a few video games have women in leading parts; Tomb Raider’s Lara Croft is the prototypical example. In our study we investigated the so-called ‘Lara phenomenon,’ that is, the appearance of a competent female character in a dominant position. We also studied the portrayal of men and the race of both male and female characters. We did a content analysis on the introductory films of 12 contemporary video games. Our results show that female characters appeared as often in leading parts as male characters did. They were portrayed with a sexualized emphasis on female features. Most game characters belonged to the dominant White race, the heroes exclusively so.     

Engineering and the Problem of Moral Overload

When thinking about ethics, technology is often only mentioned as the source of our problems, not as a potential solution to our moral dilemmas. When thinking about technology, ethics is often only mentioned as a constraint on developments, not as a source and spring of innovation. In this paper, we argue that ethics can be the source of technological development rather than just a constraint and technological progress can create moral progress rather than just moral problems. We show this by an analysis of how technology can contribute to the solution of so-called moral overload or moral dilemmas. Such dilemmas typically create a moral residue that is the basis of a second-order principle that tells us to reshape the world so that we can meet all our moral obligations. We can do so, among other things, through guided technological innovation.     

How Can You Best Measure Reaction Times?

Comparing many ways of measuring and analyzing reaction times reveals that the chosen method influences both the judged reaction time and, more importantly, conclusions about how the reaction time depends on the circumstances under study. The task was to lift one's finger in response to a tone. The response amplitude was either constrained or not. Constraining the amplitude made the response less vigorous. When the response was less vigorous it took longer to move far enough to release a switch or exceed the elasticity of the finger pulp. Although using a micro-switch would have made the reaction time appear to be longer for the constrained movement, reaction times determined in the most reliable ways were not systematically longer for the constrained movement. The most reliable method is to use extrapolation of the change in the average force that the finger exerts on the surface to estimate the reaction time.     

Being a Body: Women’s Appearance Related Self-Views and their Dehumanization of Sexually Objectified Female Targets

When sexually objectified, women are reduced to their bodies or sexual body parts and become likely targets of dehumanization. Not only men, but also women engage in this process. In the present research, we tested the link between women’s appearance related self-views and their tendency to dehumanize sexually objectified female targets. Specifically, we test two mediational models and predict that (1) women’s motivation to look attractive to men and (2) their tendency to internalize the sociocultural beauty standards are linked with the dehumanization of sexually objectified female targets, and their level of self-objectification mediates both relations. To test these hypotheses, a sample of 55 heterosexual undergraduate female students from Northern Italy volunteered. Participants’ motivation to look attractive to men, their level of internalization of the sociocultural beauty standards, and their tendency to self-objectify was measured. Results confirmed that only sexually objectified female targets were significantly dehumanized, while their non-objectified counterparts were not. Moreover, both participants’ motivation to look attractive to men and their tendency to internalize the sociocultural beauty standards were positively linked with the dehumanization of sexually objectified female targets. As expected, these relations were mediated by participants’ level of self-objectification. These results show that higher levels of self-objectification among those women who are motivated either to look attractive to men or to internalize the sociocultural beauty standards are linked with their tendency to dehumanize sexually objectified female targets.     

Spatiotemporal configuration of memory arrays as a component of VWM representations

Visual working memory (VWM) has been found to support a very limited representation of visual information and yet relatively little is known about the mechanisms that underlie this important cognitive construct. Prior investigations have revealed that VWM performance can be affected by relatively minor changes in the test method as well as the method of encoding. In the present two experiments, we separately investigated these two factors. The results suggest that sequential object displays can improve VWM performance significantly but that a lack of context relatedness between encoding and retrieval impairs performance. This impairment seems to be caused by a mismatch in the spatiotemporal configuration of the memory and test displays, and, importantly, cannot be compensated by selective attention. These findings suggest that spatiotemporal configuration information may be a fundamental component of the information that is stored in VWM as suggested by a number of influential theories.