Impaired emotion recognition in music in Parkinson’s disease

Music has the potential to evoke strong emotions and plays a significant role in the lives of many people. Music might therefore be an ideal medium to assess emotion recognition. We investigated emotion recognition in music in 20 patients with idiopathic Parkinson’s disease (PD) and 20 matched healthy volunteers. The role of cognitive dysfunction and other disease characteristics in emotion recognition was also evaluated.     

Mentoring in academia: An examination of the experiences of protégés of color

This study examines the mentoring experiences of African, Hispanic, and Native-American protégés in an academic setting. In doing so we consider whether surface-level and deep-level similarity are related to relationship satisfaction and perceived levels of support. Specifically, we consider whether for protégés of color, having a mentor who is also of color and/or who is perceived as having similar values is positively associated with satisfaction and support. Additionally, we examine from the perspective of those who mentor protégés of color, whether their relationship satisfaction is associated with having a protégé who is similar or different with regards to race/ethnicity and perceived value similarity. Finally, we consider the mediating roles of interpersonal comfort and commitment. Our results indicate that graduate students of color receive more psychosocial and instrumental support from, and are more satisfied with mentors of color. Further, interpersonal comfort and commitment mediate the relationships between surface and deep-level similarity and mentoring outcomes.     

How emotional pictures influence visuospatial binding in short-term memory in ageing and Alzheimer’s disease?

The present study examines the prediction that emotion can facilitate short-term memory. Nevertheless, emotion also recruits attention to process information, thereby disrupting short-term memory when tasks involve high attentional resources. In this way, we aimed to determine whether there is a differential influence of emotional information on short-term memory in ageing and Alzheimer's disease (AD). Fourteen patients with mild AD, 14 healthy older participants (NC), and 14 younger adults (YA) performed two tasks. In the first task, involving visual short-term memory, participants were asked to remember a picture among four different pictures (negative or neutral) following a brief delay. The second task, a binding memory task, required the recognition by participants of a picture according to its spatial location. The attentional cost involved was higher than for the first task. The pattern of results showed that visual memory performance was better for negative stimuli than for neutral ones, irrespective of the group. In contrast, binding memory performance was essentially poorer for the location of negative pictures in the NC group, and for the location of both negative and neutral stimuli in the AD group, in comparison to the YA group. Taken together, these results show that emotion has beneficial effects on visual short-term memory in ageing and AD. In contrast, emotion does not improve their performances in the binding condition.     

Power,Conflict, and Community: How Gendered Views of Political Power Influence Women's Political Ambition

We provide a novel approach to understanding the political ambition gap between men and women by examining perceptions of the role of politician. Across three studies, we find that political careers are viewed as fulfilling power‐related goals, such as self‐promotion and competition. We connect these goals to a tolerance for interpersonal conflict and both of these factors to political ambition. Women's lack of interest in conflict and power‐related activities mediates the relationship between gender and political ambition. In an experiment, we show that framing a political career as fulfilling communal goals—and not power‐related goals—reduces the ambition gap.     

The effect of continuous, intermittent, and "placebo" reinforcement on the effectiveness of the conditioning treatment for enuresis nocturna

It has been suggested that intermittent reinforcement may be of value in reducing the rate of relapse in bedwetting conditioning therapy. An experiment was conducted with 30 enuretic boys to examine acquisition and extinction parameters of continuous (100%), intermittent (70% variable ratio), and “placebo” (0%) reinforcement schedules. Reinforced trials were administered as in the typical Mowrer conditioning procedure. Non-reinforced trials were achieved by means of a time delay with the subsequent alarm being activated in the parent's room rather than in the child's room. These procedures required the development of a new conditioning device which could be programmed to automatically administer the desired schedule of reinforcement. The results of the field investigation revealed that continuous reinforcement (CR) and intermittent reinforcement (IR) groups attained acquisition in approximately the same number of trials and with essentially the same success rate. Relapse rate was significantly greater in the CR group than in the IR group. The placebo group showed no improvement over the 6 weeks of treatment. The results of this study may be interpreted as supporting the tenet that relapse can be viewed and treated as an extinction of the acquired response.     

Augmentation of eating following a signal for feeding in rats

Previous studies have shown that a CS for feeding produces increases in some measures of excitation, but effects on other behaviors have not been examined. Two experiments examined effects on eating. In each experiment, one group of rats was presented with a CS preceding feeding, while control groups had no anticipatory signal. Ss with signaled feeding learned to eat more than control Ss, and their body weights were relatively higher. These results indicate that conditioned incentive stimuli may have broader effects than have classically been attributed to them. It is also suggested that learned factors may mediate the effects of deprivation operations on eating and play a significant part in the regulation of feeding.     

On Herrnstein's equation and related forms

In 1970, Herrnstein proposed a simple equation to describe the relation between response and reinforcement rates on interval schedules. Its empirical basis is firm, but its theoretical foundation is still uncertain. Two approaches to the derivation of Herrnstein's equation are discussed. It can be derived as the equilibrium solution to a process model equivalent to familiar linear-operator learning models. Modifications of this approach yield competing power-function formulations. The equation can also be derived from the assumption that response strength is proportional to reinforcement rate, given that there is a ceiling on response rate. The proportional relation can, in turn, be derived from a threshold assumption equivalent to Shimp's “momentary maximizing”. This derivation implies that the two parameters of Herrnstein's equation should be correlated, and may explain its special utility in application to internal schedules.     

Considerations in the choice of interobserver reliability estimates

Two types of interobserver reliability values may be needed in treatment studies in which observers constitute the primary data-acquisition system: trial reliability and the reliability of the composite unit or score which is subsequently analyzed, e.g., daily or weekly session totals. Two approaches to determining interobserver reliability are described: percentage agreement and "correlational" measures of reliability. The interpretation of these estimates, factors affecting their magnitude, and the advantages and limitations of each approach are presented.