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.     

“Girls Are as Good as Boys at Math” Implies That Boys Are Probably Better: A Study of Expressions of Gender Equality

Although “Girls are as good as boys at math” explicitly expresses equality, we predict it could nevertheless suggest that boys have more raw talent. In statements with this subject‐complement structure, the item in the complement position serves as the reference point and is thus considered more typical and prominent. This explains why “Tents are like houses,” for instance, sounds better than “Houses are like tents”—people generally think of houses as more typical. For domains about ability, the reference point should be the item that is typically more skilled. We further propose that the reference point should be naturally more skilled. In two experiments, we presented adults with summaries of actual scientific evidence for gender equality in math (Experiment 1) or verbal ability (Experiment 2), but we manipulated whether the reference point in the statements of equality in the summaries (e.g., “Boys’ verbal ability is as good as girls’”) was girls or boys. As predicted, adults attributed more natural ability to each gender when it was in the complement rather than subject position. Yet, in Experiment 3, we found that when explicitly asked, participants judged that such sentences were not biased in favor of either gender, indicating that subject‐complement statements must be transmitting this bias in a subtle way. Thus, statements such as “Girls are as good as boys at math” can actually backfire and perpetuate gender stereotypes about natural ability.     

Maternal parenting as a mediator of the relationship between intimate partner violence and effortful control

The current study examined the relationship between intimate partner violence (IPV), maternal parenting behaviors, and child effortful control in a diverse sample of 705 families living in predominantly low-income, rural communities. Using structural equation modeling, the authors simultaneously tested whether observed sensitive parenting and/or harsh-intrusive parenting over the toddler years mediated the relationship between early IPV and later effortful control. Results suggest that parenting behaviors fully mediate this relationship. Although higher levels of IPV were associated with both higher levels of harsh-intrusive parenting and lower levels of sensitive supportive parenting, only sensitive supportive parenting was associated with later effortful control when both parenting indices were considered in the same model.     

Seeing What We Know, Knowing What We See: Challenging the Limits of Visual Acuity

Ageism has resulted in overstated expectations regarding the inevitable deterioration in human capabilities, such as visual perception, with age (Rowe and Kahn in Science, 237, 143?C149, 1987; Grant in Health and Social Work, 21, 9?C15, 1996). Human visual perception, however, is of a largely constructive nature, evidenced in the complementary interactions between top-down inputs (e.g., expectations) and bottom-up stimuli (Engel et al. in National Review of Neuroscience, 2(10), 704?C716, 2001; Miller and Cohen in, Annual Review of Neuroscience, 24, 167-202, 2001). Based on this constructive nature, we hypothesized that visual perception may be better than is typically expected. In three experiments, we demonstrated the malleability of visual acuity using a conditioning procedure involving manipulations in bottom-up stimuli. Experimental groups read a book excerpt with one letter in decreased font size, while the control groups read the same book excerpt with all letters in the same font size. Experiment 1 (N?=?112) examined whether visual acuity could be enhanced for a specific letter. Experiment 2 (N?=?70) assessed whether visual acuity could be enhanced for a non-conditioned letter, while Experiment 3 (N?=?108) evaluated whether the visual conditioning effects would transfer to all non-conditioned letters. Visual acuity for experimental groups was significantly better than that in the control groups, speaking to the general malleability of our visual sense.     

Bilingualism: consequences for mind and brain

Building on earlier evidence showing a beneficial effect of bilingualism on children's cognitive development, we review recent studies using both behavioral and neuroimaging methods to examine the effects of bilingualism on cognition in adulthood and explore possible mechanisms for these effects. This research shows that bilingualism has a somewhat muted effect in adulthood but a larger role in older age, protecting against cognitive decline, a concept known as 'cognitive reserve'. We discuss recent evidence that bilingualism is associated with a delay in the onset of symptoms of dementia. Cognitive reserve is a crucial research area in the context of an aging population; the possibility that bilingualism contributes to cognitive reserve is therefore of growing importance as populations become increasingly diverse.     

Acquisition of social referencing via discrimination training in infants

This experiment investigated social referencing as a form of discriminative learning in which maternal facial expressions signaled the consequences of the infant's behavior in an ambiguous context. Eleven 4- and 5-month-old infants and their mothers participated in a discrimination-training procedure using an ABAB design. Different consequences followed infants' reaching toward an unfamiliar object depending on the particular maternal facial expression. During the training phases, a joyful facial expression signaled positive reinforcement for the infant reaching for an ambiguous object, whereas a fearful expression signaled aversive stimulation for the same response. Baseline and extinction conditions were implemented as controls. Mothers' expressions acquired control over infants' approach behavior for all participants. All participants ceased to show discriminated responding during the extinction phase. The results suggest that 4- and 5-month-old infants can learn social referencing via discrimination training.     

Relative efficacy of human social interaction and food as reinforcers for domestic dogs and hand-reared wolves

Despite the intimate relationship dogs share with humans in Western society, we know relatively little about the variables that produce and maintain dog social behavior towards humans. One possibility is that human social interaction is itself a reinforcer for dog behavior. As an initial assessment of the variables that might maintain dog social behavior, we compared the relative efficacy of brief human social interaction to a small piece of food as a reinforcer for an arbitrary response (nose touch). We investigated this in three populations of canids: shelter dogs, owned dogs, and hand-reared wolves. Across all three canid populations, brief social interaction was a relatively ineffective reinforcer compared to food for most canids, producing lower responding and longer latencies than food.     

‘Too black or not black enough’: Social identity complexity in the political rhetoric of Barack Obama

The election of the first African‐American President of the United States, Barack Obama, has been widely recognised as an extraordinary milestone in the history of the United States and indeed the world. With the use of a discursive psychological approach combined with central theoretical principles derived from social identity and self‐categorisation theories, this paper analyses a corpus of speeches Obama delivered during his candidacy for president to examine how he attended to and managed his social identity in his political discourse. Building on a social identity model of leadership, we examine specifically how Obama mobilises political support and social identification by building an identity for himself as a prototypical representative of the American people, notwithstanding the protracted public debate within both the White and Black American communities that had questioned and contested Obama's identity. Moreover, we demonstrate how Obama managed the dilemmas around his identity by actively crafting an in‐group identity that was oriented to an increasingly socially diverse America—a diversity that he himself exemplified and embodied as a leader. As an ‘entrepreneur’ of identity, Obama's rhetorical project was to position himself as an exceptional leader, whose very difference was represented as ‘living proof’ of the widely shared collective values that constitute the ‘American Dream’. Drawing on social identity complexity theory, we suggest that by providing more inclusive and complex categories of civic and national identity, Obama's presidency has the potential to radically transform what it means to be a prototypical in‐group member in America. Copyright © 2012 John Wiley & Sons, Ltd.