COGNITIVE APPRAISALS OF LIFE STRESS AND DEPRESSION IN THE ELDERLY: A CROSS-CULTURAL COMPARISON OF ASIANS AND CAUCASIANS

Cognitive models of depression have not been adequately tested in different cultural settings involving personally relevant events that affect the lives of the elderly. A cross-sectional comparison was made of cognitions obtained from Asian and Caucasian subjects, residing in Canada and the United States. The objective was to determine whether cognitive appraisals of stressful events would differentiate the elderly in the two cultural groups. Results supported the hypotheses that cognitive appraisals of locus of control, uncertainty, self-responsibility, self-confidence in future coping and fear about future recurrence of negative events are strongly associated with the depressive responses of the elderly in general. A comparison of the cognitive appraisals of the elderly in the two cultural groups showed depressed Asians more significantly than depressed Caucasians, reporting more external locus of control and self-blaming attributions. The results have implications for community workers, psychotherapists and social welfare agents concerned with the mental well-being of the elderly and the care of the elderly from different cultures.     

Weighing the Evidence: A Systematic Review on Long-Term Neurocognitive Effects of Cannabis Use in Abstinent Adolescents and Adults

Findings on neurocognitive effects of sustained cannabis use are heterogeneous. Previous work has rarely taken time of abstinence into account. In this review, we focus on understanding sustained effects of cannabis, which begin when clinical symptoms of the drug have worn off after at least 14 days. We conducted a search between 2004 and 2015 and found 38 studies with such a prolonged abstinence phase. Study-design quality in terms of evidence-based medicine is similar among studies. Studies found some attention or concentration deficits in cannabis users (CU). There is evidence that chronic CU might experience sustained deficits in memory function. Findings are mixed regarding impairments in inhibition, impulsivity and decision making for CU, but there is a trend towards worse performance. Three out of four studies found evidence that motor function remains impaired even after a time of abstinence, while no impairments in visual spatial functioning can be concluded. Functional imaging demonstrates clear differences in activation patterns between CU and controls especially in hippocampal, prefrontal and cerebellar areas. Structural differences are found in cortical areas, especially the orbitofrontal region and the hippocampus. Twenty studies (57 %) reported data on outcome effects, leading to an overall effect size of r _mean?=?.378 (CI 95 %?=?[.342; .453]). Heavy use is found to be more consistently associated with effects in diverse domains than early age of onset. Questions of causality―in view of scarce longitudinal studies, especially those targeting co-occurring psychiatric disorders―are discussed.     

Prior probability modulates anticipatory activity in category-specific areas

Bayesian models are currently a dominant framework for describing human information processing. However, it is not clear yet how major tenets of this framework can be translated to brain processes. In this study, we addressed the neural underpinning of prior probability and its effect on anticipatory activity in category-specific areas. Before fMRI scanning, participants were trained in two behavioral sessions to learn the prior probability and correct order of visual events within a sequence. The events of each sequence included two different presentations of a geometric shape and one picture of either a house or a face, which appeared with either a high or a low likelihood. Each sequence was preceded by a cue that gave participants probabilistic information about which items to expect next. This allowed examining cue-related anticipatory modulation of activity as a function of prior probability in category-specific areas (fusiform face area and parahippocampal place area). Our findings show that activity in the fusiform face area was higher when faces had a higher prior probability. The finding of a difference between levels of expectations is consistent with graded, probabilistically modulated activity, but the data do not rule out the alternative explanation of a categorical neural response. Importantly, these differences were only visible during anticipation, and vanished at the time of stimulus presentation, calling for a functional distinction when considering the effects of prior probability. Finally, there were no anticipatory effects for houses in the parahippocampal place area, suggesting sensitivity to stimulus material when looking at effects of prediction.     

Reasoning with conditionals: Does every counterexample count? It’s frequency that counts

A series of experiments investigated what determines people's degree of belief in conditionals and their readiness to draw inferences from them. Information on the frequency of exceptions to conditional rules was contrasted with information about the number of different disabling conditions causing these exceptions. Experiments 1 and 2, using conditionals with arbitrary contents, revealed a strong effect of frequency information and no effect of disabling information. Experiment 3 established that, in the absence of frequency information, the disabling condition information used in Experiments 1 and 2 affected belief in the conditionals and inference acceptance, as has been found in many previous studies (Byrne, 1989; DeNeys, Schaeken, & d'Ydewalle, 2003b). Experiment 4 extended the results of Experiments 1 and 2 to everyday conditionals. The results show that belief in a conditional, and the confidence in inferences subsequently drawn from it, both depend on the subjective conditional probability of the consequent given the antecedent. This probability is estimated from the relative frequency of exceptions regardless of what causes them.     

Spirituality Among College Freshmen: Relationships to Self‐Esteem,Body Image,and Stress

The authors investigated the relationships between spirituality, body image, self‐esteem, and stress in 204 college freshmen who identified themselves as being highly spiritual. A positive relationship was found between spirituality and self‐esteem. Although self‐esteem was found to be negatively related to stress, spirituality served as a buffer in this relationship. When gender of participants was examined, men and women did not differ in spirituality. Greater spirituality was related to lower body surveillance, an aspect of body image, for men, but it was not related to body image for women. Overall, however, women experienced greater body image dissatisfaction than did men.     

Who shows which kind of humor? Exploring sociodemographic differences in eight comic styles in a large Chilean sample

The present study investigates mean-level differences in eight comic styles (fun, benevolent humor, nonsense, wit, irony, satire, sarcasm, and cynicism) depending on the sociodemographic variables gender, age, education, political spectrum, and religious affiliation. A large and varied Chilean adult sample (N = 1,272, 60.1% women; age M = 39.94, SD = 17.33) was recruited in face-to-face interviews and online testing. They completed self-reports of the comic styles (the Comic Style Markers) and sociodemographic variables. Overall, small, but meaningful, differences in comic styles were found for the different sociodemographic groups. Men scored higher than women in all comic styles except for benevolent humor, and six styles decreased with age. Having lower education was associated with more cynicism, while the reverse pattern was found for satire and wit. Religious people showed lower scores in four styles than non-religious people, and cynicism was higher in those identifying with left wing rather than right-wing attitudes. The present study thus provides insights into who is more likely to engage in different kinds of humor in their everyday lives.     

The role of fantasies and dreams in the TV viewing—aggression relationship

The TV viewing habits of 391 8-year-old and 10-year-old Finnish children were related to their aggression, their aggressive and fear fantasies, and their dreams and fantasies about TV. Two measurements of aggression were made: peer-nominated aggression and self-rated aggression. TV viewing habits were measured by the amount of TV seen during a week and violence viewing, that is, how regularly violent TV serials were watched. Hypothetically, in addition to a direct relationship between TV viewing and aggression, there could also be an indirect relationship; for example, fantasizing might provide a link in the TV viewing-aggression relationship. There were significant positive correlations for the boys between TV viewing variables and aggression. There were also significant positive correlations between the amount of TV and televised violence viewing and fear and aggressive fantasies in general and with dreams and fantasies about actual TV programs seen. The correlations were less frequent for the girls. The same tendencies were evident for age groups and education. More frequent positive correlations were found with older children and regular classes than with younger children and music classes. The use of fantasy was also correlated positively with both peer-nominated and self-rated aggression. The results of the present study support the information-processing theory, which suggests that the more a child watches TV the more he or she has fantasies about the programs and rehearses the scenes viewed which, in turn, results in explicit aggressive behavior.     

Saliency on a natural scene background: Effects of color and luminance contrast add linearly

In natural vision, shifts in spatial attention are associated with shifts of gaze. Computational models of such overt attention typically use the concept of a saliency map: Normalized maps of center-surround differences are computed for individual stimulus features and added linearly to obtain the saliency map. Although the predictions of such models correlate with fixated locations better than chance, their mechanistic assumptions are less well investigated. Here, we tested one key assumption: Do the effects of different features add linearly or according to a max-type of interaction? We measured the eye position of observers viewing natural stimuli whose luminance contrast and/or color contrast (saturation) increased gradually toward one side. We found that these feature gradients biased fixations toward regions of high contrasts. When two contrast gradients (color and luminance) were superimposed, linear summation of their individual effects predicted their combined effect. This demonstrated that the interaction of color and luminance contrast with respect to human overt attention is—irrespective of the precise model—consistent with the assumption of linearity, but not with a max-type interaction of these features.     

Implicit but Not Explicit Affectivity Predicts Circadian and Reactive Cortisol: Using the Implicit Positive and Negative Affect Test

ABSTRACT Self-report measures assess mental processes or representations that are consciously accessible. In contrast, implicit measures assess automatic processes that often operate outside awareness. Whereas self-report measures have often failed to show expected relationships with endocrine stress responses, little effort has been made to relate implicit measures to endocrine processes. The present work examines whether implicit affectivity as assessed by the Implicit Positive and Negative Affect Test (IPANAT) predicts cortisol regulation. In Study 1 , implicit low positive affectivity, but not negative affectivity, significantly predicted circadian cortisol release. In Study 2 , implicit negative affectivity, but not positive affectivity, significantly predicted the cortisol response to acute stress. By contrast, cortisol regulation was not predicted by self-reported affectivity. The findings support the use of implicit affectivity measures in studying individual differences in endocrine stress responses and point to a differential role of positive and negative affectivity in baseline versus stress-contingent cortisol release, respectively.