Expectations,gains, and losses in the anterior cingulate cortex

The anterior cingulate cortex (ACC) participates in evaluating actions and outcomes. Little is known on how action-reward values are processed in ACC and if the context in which actions are performed influences this processing. In the present article, we report ACC unit activity of monkeys performing two tasks. The first task tested whether the encoding of reward values is context dependent—that is, dependent on the size of the other rewards that are available in the current block of trials. The second task tested whether unexpected events signaling a change in reward are represented. We show that the context created by a block design (i.e., the context of possible alternative rewards) influences the encoding of reward values, even if no decision or choice is required. ACC activity encodes the relative and not absolute expected reward values. Moreover, cingulate activity signals and evaluates when reward expectations are violated by unexpected stimuli, indicating reward gains or losses.     

Self‐esteem discrepancies and defensive reactions to social feedback

Recent research has provided increasing evidence that discrepancies between implicit and explicit self‐esteem (SE) are related to defensiveness. However, only one pattern, called fragile SE (a combination of high explicit and low implicit SE), has been the focus of research so far. Relatively little attention has been paid to the second possible SE discrepancy (low explicit/high implicit). We propose that both types of discrepancies are maladaptive, because they indicate a lack of integration in self‐representation. We conducted two studies on the correlates of discrepant SE in the sphere of defensiveness. We hypothesized that persons with discrepant SE exhibit more defensive behaviour than individuals with congruent SE. In two student samples, explicit SE was measured by means of the Multidimensional Self‐Esteem Scale. Implicit SE was measured with the Name Letter Technique (Study 1) and an Implicit Association Test (Study 2). In Study 1 (N = 102) we examined effects of implicit and explicit SE on defensive reactions to ambiguous statements. For this purpose, we adapted the Ambiguous Statements Task (AST, Tafarodi, 1998 ), a procedure that measures participants' tendency to interpret ambiguous expressions in a positive vs negative manner. We found that the combination of low explicit SE and high implicit SE was associated with a more positive interpretation of the ambiguous statements. Study 2 (N = 87) investigated the effects of discrepant SE on reactions to SE threat in an experimental setting. The time participants spent reading positive or negative social feedback was used as an unobtrusive measure of defensiveness. We found that people with discrepant SE went through the negative feedback faster than people with congruent SE. In sum, the studies provide converging evidence that both kinds of discrepancies between implicit and explicit SE are related to defensive behaviour.     

The interplay between values,acculturation and adaptation: A study on Turkish‐Belgian adolescents

Although there is a bulk of evidence for the relations between values, acculturation, and adaptation, the interrelations between these key concepts of the acculturation literature have not yet been investigated simultaneously. The present study proposes a model connecting value orientations (separatedness and conformity) to adaptation outcomes (sociocultural and psychological). Furthermore, this link was hypothesized to be strengthened by an indirect relationship where acculturation strategies (culture maintenance and culture adoption) would relate certain values to certain aspects of adaptation. The model was tested on 287 Turkish‐Belgian adolescents with an average age of 16.27 years (SD = 1.86 years). SEM analysis confirmed the hypothesized indirect links underlining the crucial role of acculturation strategies as mediators in the adaptation process. Separatedness predicted sociocultural adaptation via culture adoption whereas conformity impacted psychological adaptation via culture maintenance. In addition, separatedness predicted poorer psychological adaptation. Results were discussed with reference to inverse benefits and costs of individualism and collectivism.     

Fear conditioning in panic disorder: Enhanced resistance to extinction

Enhanced conditionability has been proposed as a crucial factor in the etiology and maintenance of panic disorder (PD). To test this assumption, the authors of the current study examined the acquisition and extinction of conditioned responses to aversive stimuli in PD. Thirty-nine PD patients and 33 healthy control participants took part in a differential aversive conditioning experiment. A highly annoying but not painful electrical stimulus served as the unconditioned stimulus (US), and two neutral pictures were used as either the paired conditioned stimulus (CS+) or the unpaired conditioned stimulus (CS-). Results indicate that PD patients do not show larger conditioned responses during acquisition than control participants. However, in contrast to control participants, PD patients exhibited larger skin conductance responses to CS+ stimuli during extinction and maintained a more negative evaluation of them, as indicated by valence ratings obtained several times throughout the experiment. This suggests that PD patients show enhanced conditionability with respect to extinction.     

Detecting Deceit in Pairs of Children1

This study examined adults’ ability to distinguish between truthful and deceptive pairs of children. Adult observers (N = 88) judged the veracity of one of 22 truthful or deceptive pairs of children (12–13 years). The children were interviewed separately about their real or imagined encounters with an unknown man. Analyses showed that the overall accuracy was 62.5%; significantly better than chance level of 50%. Deception detection accuracy was higher when watching both pair members than when watching one child. The analysis of self‐reported cues to deception given by observers showed that the consistency between the children's statements was the most frequent cue. An analysis of the actual consistency of children's statements showed significantly more contradictions in the deceptive statements.     

The impact of negative moods on self-enhancing cognitions: the role of reflective versus ruminative mood orientations

This research program examined how self-focused attention to feelings affects the relation between mood negativity and self-enhancing thought. The primary hypothesis was that the particular manner in which people focus on their moods (reflective vs. ruminative) determines whether they reveal positive (i.e., mood-incongruent) or negative (i.e., mood-congruent) self-relevant thoughts in response to negative moods. Studies 1-4 revealed that social comparisons, temporal comparisons, and other self-enhancing cognitions (i.e., attributions, disidentification, relationship evaluations) are more likely to be mood incongruent when people adopt a reflective orientation to their negative feelings and more likely to be mood congruent when they adopt a ruminative orientation. Additionally, moods and mood orientations affected self-enhancing thoughts through the mediating influence of mood regulation goals and intentions (Studies 5 and 6).     

Dimensionality of the Rosenberg Self-Esteem Scale and its relationships with the Three-and the Five-factor personality models

We investigated the dimensionality of the French version of the Rosenberg Self-Esteem Scale (RSES; Rosenberg, 1965) using confirmatory factor analysis. We tested models of 1 or 2 factors. Results suggest the RSES is a 1-dimensional scale with 3 highly correlated items. Comparison with the Revised NEO-Personality Inventory (NEO-PI-R; Costa, McCrae, & Rolland, 1998) demonstrated that Neuroticism correlated strongly and Extraversion and Conscientiousness moderately with the RSES. Depression accounted for 47% of the variance of the RSES. Other NEO-PI-R facets were also moderately related with self-esteem.     

Size matters: saccades during scene perception

We investigated the effect of image size on saccade amplitudes. First, in a meta-analysis, relevant results from previous scene perception studies are summarised, suggesting the possibility of a linear relationship between mean saccade amplitude and image size. Forty-eight observers viewed 96 colour scene images scaled to four different sizes, while their eye movements were recorded. Mean and median saccade amplitudes were found to be directly proportional to image size, while the mode of the distribution lay in the range of very short saccades. However, saccade amplitudes expressed as percentages of image size were not constant over the different image sizes; on smaller stimulus images, the relative saccades were found to be larger, and vice versa. In sum, and as far as mean and median saccade amplitudes are concerned, the size of stimulus images is the dominant factor. Other factors, such as image properties, viewing task, or measurement equipment, are only of subordinate importance. Thus, the role of stimulus size has to be reconsidered, in theoretical as well as methodological terms.