Implicit power motive effects on the ERP processing of emotional intensity in anger faces

Research has shown that anger faces represent a potent motivational incentive for individuals with high implicit power motive (nPower). However, it is well known that anger expressions can vary in intensity, ranging from mild anger to rage. To examine nPower-relevant emotional intensity processing in anger faces, an ERP oddball task with facial stimuli was utilized, with neutral expressions as the standard and targets varying on anger intensity (50%, 100%, or 150% emotive). Thirty-one college students participated in the experiment (15 low and 16 high nPower persons determined by the Picture Story Exercise, PSE). In comparison with low nPower persons, higher percentage of correct responses was observed for high nPower persons when both groups discriminated low-intensity (50% intensity) anger faces from neutral faces. ERPs between 100% and 150% anger expressions revealed that high-intensity (150%) anger expressions elicited larger P3a and late positive potential (LPP) amplitudes relative to prototypical (100% intensity) anger expressions for power-motivated individuals. Conversely, low nPower participants showed no differences at both P3a and LPP components. These findings demonstrate that persons with high nPower are sensitive to intensity changes in anger faces and their sensitivity increases with the intensity of anger faces.     

The influence of emotional faces on the spatial allocation of attention

Background objectives: Studies suggest that the right hemisphere is dominant for emotional facial recognition. In addition, whereas some studies suggest the right hemisphere mediates the processing of all emotions (dominance hypothesis), other studies suggest that the left hemisphere mediates positive emotions the right mediates negative emotions (valence hypothesis). Since each hemisphere primarily attends to contralateral space, the goals of this study was to learn if emotional faces would induce a leftward deviation of attention and if the valence of facial emotional stimuli can influence the normal viewer’s spatial direction of attention. Methods: Seventeen normal right handed participants were asked to bisect horizontal lines that had all combinations of sad, happy or neutral faces at ends of these lines. During this task the subjects were never requested to look at these faces and there were no task demands that depended on viewing these faces. Results: Presentation of emotional faces induced a greater leftward deviation compared to neutral faces, independent of where (spatial position) these faces were presented. However, faces portraying negative emotions tended to induce a greater leftward bias than positive emotions. Conclusions: Independent of location, the presence of emotional faces influenced the spatial allocation of attention, such that normal subjects shift the direction of their attention toward left hemispace and this attentional shift appears to be greater for negative (sad) than positive faces (happy).     

Age-related differences in the distractor previewing effect with schematic faces of emotions

Young and older adults searched for a unique face in a set of three schematic faces and identified a secondary feature of the target. The faces could be negative, positive, or neutral. Young adults were slower and less accurate in searching for a negative face among neutral faces when they had previewed a display of negative faces than when they had previewed neutral faces, indicating an emotional distractor previewing effect (DPE), but this effect was eliminated with inverted faces. The DPE is an index of inter-trial inhibition to keep attention away from previewed, non-target information. Older adults also showed such an emotional DPE, but it was present with both upright and inverted faces. These results show that, in general, both young and old participants are sensitive to trial history, yet the different patterns of results suggest that these two groups remember and use different types of perceptual information when searching through emotional faces.     

Processing emotional stimuli: Comparison of saccadic and manual choice-reaction times

We compared the speed of discrimination for emotional and neutral faces in four experiments, using a forced-choice saccadic and manual reaction time task. Unmasked, brief (20 ms) bilateral presentation of schematic (Exp. 1) or naturalistic (Exp. 2) emotional/neutral face pairs, led to shorter discrimination of emotional stimuli in saccadic localisation task. When the effect of interference from emotional stimuli is ruled out by showing a pairing of the emotional or neutral face with an outline face, faster saccadic discrimination was obtained for fearful facial expression only (Exp. 3). The manual discrimination reaction time was not significantly different for emotional versus neutral stimuli. To explore the absence of a manual RT effect we manipulated the stimulus duration (20 ms vs. 500 ms: Exp. 4). Faster saccadic discrimination of emotional stimuli was observed at both durations. For manual responses, emotional bias was observed only at the longest duration (500 ms). Overall, comparison of saccadic and manual responses shows that faster discrimination of emotional/neutral stimuli can be carried out within the oculomotor system. In addition, emotional stimuli are processed preferentially to neutral face stimuli.     

Attentional bias towards emotional facial expressions in survivors of dating violence

This study identified components of attentional bias (e.g. attentional vigilance, attentional avoidance and difficulty with disengagement) that are critical characteristics of survivors of dating violence (DV). Eye movements were recorded to obtain accurate and continuous information regarding attention. DV survivors with high post-traumatic stress symptoms (DV-High PTSS group; n = 20) and low post-traumatic stress symptoms (DV-Low PTSS group; n = 22) and participants who had never experienced DV (NDV group; n = 21) were shown screens displaying emotional (angry, fearful and happy) faces paired with neutral faces and negative (angry and fearful) faces paired with happy faces for 10 s. The results indicate that the DV-High PTSS group spent longer dwelling on angry faces over time compared with the DV-Low PTSS and NDV groups. This result implies that the DV-High PTSS group focused on specific trauma-related stimuli but does not provide evidence of an attentional bias towards threatening stimuli in general.     

Not Enough of a ‘Dark’ Trait? Linking Machiavellianism to Job Performance

Machiavellianism is typically considered to encompass rather negatively connoted characteristics such as being ruthless, deceitful or self‐centred. Concerning its influence on job performance, there have been notions about a positive linear association as well as a negative one. Somewhat reflecting these different views, a recent meta‐analysis regarding this link indicated both large variability in respective empirical investigations and no substantial linear association. Herein, we aimed to integrate the theoretical underpinnings of both perspectives of a linear link by proposing an inverted U‐shaped relation between Machiavellianism and job performance. Using data from n = 235 dyads of self‐rating and colleague rating, results supported this hypothesis with regard to the three dimensions of organisational citizenship behaviour, whereas no support was found with regard to task performance. More precisely, intermediate levels of Machiavellianism yielded the highest organisational citizenship behaviour as compared with both lower and higher levels—although employees with lower levels had outcomes nearly as high as those of employees with intermediate levels. Further, tenure was found to moderate the curvilinear relation between Machiavellianism and organisational citizenship behaviour directed at individuals. In sum, this investigation might help to disentangle different understandings of the effects of Machiavellianism in organisational life and beyond. Copyright © 2013 European Association of Personality Psychology     

Dissociation of rapid response learning and facilitation in perceptual and conceptual networks of person recognition

Repetition priming is a prominent example of non‐declarative memory, and it increases the accuracy and speed of responses to repeatedly processed stimuli. Major long‐hold memory theories posit that repetition priming results from facilitation within perceptual and conceptual networks for stimulus recognition and categorization. Stimuli can also be bound to particular responses, and it has recently been suggested that this rapid response learning, not network facilitation, provides a sound theory of priming of object recognition. Here, we addressed the relevance of network facilitation and rapid response learning for priming of person recognition with a view to advance general theories of priming. In four experiments, participants performed conceptual decisions like occupation or nationality judgments for famous faces. The magnitude of rapid response learning varied across experiments, and rapid response learning co‐occurred and interacted with facilitation in perceptual and conceptual networks. These findings indicate that rapid response learning and facilitation in perceptual and conceptual networks are complementary rather than competing theories of priming. Thus, future memory theories need to incorporate both rapid response learning and network facilitation as individual facets of priming.     

Postnatal mental health and mothers’ processing of infant emotion: an eye-tracking study

ABSTRACT

Background

Postnatal mental illnesses are associated with less maternal sensitivity. Differences in how mothers with and without mental illness process infant emotions could explain this. People with mental illness in non-perinatal populations show certain processing patterns when viewing emotional faces, but it is not clear whether these patterns are present in mothers.     

No difference in flanker effects for sad and happy schematic faces: A parametric study of temporal parameters

Flanker effects with schematic faces have been reported to be larger for happy than for sad faces, allegedly because sad faces restrict the focus of spatial attention. We report a parametric study that fails to replicate this effect. Participants performed speeded identifications of happy or sad faces accompanied by compatible or incompatible flanker faces. We varied the temporal interval between presentation of central target and flanker faces because differential attentional effects of happy and sad faces should critically depend on this variable. In contradiction to the literature, we found large compatibility effects that were modulated by temporal parameters, but not by the emotional valence of the faces, and not in the way consistent with differential attentional modulation. We conclude that previously reported asymmetries in flanker tasks with schematic faces are not due to changes in attentional scope (mediated by emotion or otherwise), but rather to perceptual low-level differences.