Re-evaluating the extractive foraging hypothesis

In his seminal 1992 paper, Dunbar examined three hypotheses advanced to explain primate intelligence, arguing that whereas his social group size hypothesis was supported, neither of two ecological hypotheses, the extractive foraging and frugivory hypotheses, were supported. Following this, and Dunbar's subsequently elaborated argument, many investigators concluded that primate intelligence arose as social rather than ecological adaptations. This paper questions Dunbar's characterization of extractive foraging and social intelligence as alternative hypotheses, raises sampling issues about Dunbar's brain data, species choice, and measurement of extractive foraging. It summarizes the extractive foraging hypothesis, and counters its critics. It reexamines the hypothesis in light of recent behavioral and brain data, new methodology for quantifying extractive foraging, and a new phylogeny of primate intelligence. It concludes that the extractive foraging hypothesis is now supported by several converging lines of evidence.     

职业枯竭的测量方法

职业枯竭领域研究使用的测量方法主要有两类：问卷测量法和客观测量法。问卷测量法又包括自陈问卷测量法和他评问卷测量法。常用的四种自陈问卷以及它们的使用情况和优缺点进行了重点评述。他评问卷法和客观测量法也简要地提及。从目前来看,自陈问卷测量法是枯竭领域的主导测量方法,并还将在很长的一段时间内保持这一地位     

Attack priming and satiation in female golden hamsters: Tests of some alternatives to the aggression arousal interpretation

“Priming” a female hamster by allowing it a single attack on an intruder placed into its home cage transiently decreases the latency and increases the probability of attack on a second trial. Although we have previously argued that this priming effect reflects an increase in aggressive arousal, an alternative interpretation is that the fear elicited by placing a foreign object into the subject's home cage is reduced when it happens again on the second trial. Another interpretation is that priming is an effect of intruder novelty, i.e., the subject perceives a difference between the first and second intruders which causes it to attack the second more quickly. Experiment 1 compared the standard two trial paradigm with different intruders to trials in which (1) the first intruder was withdrawn and used again in the second trial, and (2) the intruder remained in the cage following the first attack. All intruders were pretreated with the analgesic-sedative methotrimeprazine to reduce the variability of their behavior. Neither hypothesis tested in Experiment 1 was supported, strengthening the interpretation of attack priming as a manipulation that affects primarily internal motivational mechanisms specific to aggression. Allowing a hamster to carry out a protracted series of attacks produces a “satiation” effect that is the reverse of priming, i.e., the latency of a subsequent attack is increased and its probability reduced. It is possible that the attack satiation observed in our earlier studies was not the result of processes internal to the subject, but could have been due to habituation to a particular intruder or to certain stimuli emitted by it during the protracted interaction. In Experiment 2 subjects were given three sessions of 10 successive trials using either 1 intruder presented repeatedly, 2 intruders presented alternately, or 10 different intruders presented once each. No difference among conditions was found in this study either suggesting that subject's aggressive behavior is insensitive to whatever changes may occur in intruders' behavior or other stimulus characteristics when they have been treated with methotrimeprazine. The lack of differences among test conditions in both experiments is most likely due to the efficacy of the drug in “standardizing” intruder behavior. Experiment 2 also revealed an interesting difference in two measures of attack latency. The time elapsing between intruder presentation and attack, i.e., the standard measure of latency, decreased from the first to the fourth trail; it then increased steadily over the remaining trials. The cumulative time that the subject remained in contact with the intruder prior to attack, a measure more indicative of attention to the intruder, dropped to an asymptotic value by the second trial. This difference suggests that the satiation effect may be accounted for by subjects' increasing avoidance of the intruders over trails, perhaps as a way of regualting their level of aggressive arousal.     

Victims' emotional distress and preventive measures usage: Influence of crime severity,risk perception,and fear

The central thesis of this study is that crime victims' emotional distress, influenced by the severity of the offence experienced, impacts their propensity to utilize preventive measures via its influence on perceived risk of victimization and fear of crime. Path analysis was conducted to test a model of these relationships, utilizing data from a crime victimization survey conducted on the Caribbean Island, Trinidad, in 2015. Results suggest a direct predictive relationship between crime severity and emotional distress and indirect effects of emotional distress on preventive measures through risk perception and fear of crime. Findings were discussed in the context of prior research, comparability, and variances, and practical implications were noted.     

The Effect of PTSD Symptom Change on Suicidal Ideation in a Combined Military and Civilian Sample Engaged in Cognitive Processing Therapy

In light of the well-established relationship between posttraumatic stress disorder (PTSD) and suicidal ideation (SI), there has been a push for treatments that simultaneously improve symptoms of PTSD and decrease SI. Using data from a randomized controlled hybrid implementation-effectiveness trial, the current study investigated the effectiveness of Cognitive Processing Therapy (CPT; Resick, Monson, & Chard, 2016) on PTSD and SI. The patient sample (N = 188) was diverse in military and veteran status, gender, and comorbidity, and 73% of the sample endorsed SI at one or more points during CPT. Participants demonstrated significant improvement in SI over the course of CPT. Multilevel growth curve modeling revealed a significant association between PTSD symptom change and change in SI. Results from cross-lagged multilevel regressions indicated that PTSD symptoms predicted SI in the next session, yet SI in a given session did not predict PTSD symptoms in the next session. Potentially relevant clinical factors (i.e., military status, gender, depression diagnosis, baseline SI, study consultation condition) were not associated with the relationship between PTSD symptoms and SI. These results add to the burgeoning literature suggesting that evidence-based treatments for PTSD, like CPT, reduce suicidality in a range of individuals with PTSD, and that this reduction is predicted by improvements in PTSD symptoms.     

Employee psychological well-being during the COVID-19 pandemic in Germany: A longitudinal study of demands,resources, and exhaustion

Many governments react to the current coronavirus/COVID-19 pandemic by restricting daily (work) life. On the basis of theories from occupational health, we propose that the duration of the pandemic, its demands (e.g., having to work from home, closing of childcare facilities, job insecurity, work-privacy conflicts, privacy-work conflicts) and personal- and job-related resources (co-worker social support, job autonomy, partner support and corona self-efficacy) interact in their effect on employee exhaustion. We test the hypotheses with a three-wave sample of German employees during the pandemic from April to June 2020 (N_w1 = 2900, N_w12 = 1237, N_w123 = 789). Our findings show a curvilinear effect of pandemic duration on working women's exhaustion. The data also show that the introduction and the easing of lockdown measures affect exhaustion, and that women with children who work from home while childcare is unavailable are especially exhausted. Job autonomy and partner support mitigated some of these effects. In sum, women's psychological health was more strongly affected by the pandemic than men's. We discuss implications for occupational health theories and that interventions targeted at mitigating the psychological consequences of the COVID-19 pandemic should target women specifically.     

Taking Care of Each Other: How Can We Increase Compliance with Personal Protective Measures During the COVID-19 Pandemic in Chile?

In the context of the COVID-19 pandemic, personal protective measures (e.g., social distancing, handwashing, and mask wearing) have been adopted as a cornerstone to limit the spread of the disease. Yet, the effectiveness of these measures depends on people's levels of adherence. In this article, we apply social-psychological research to the study of compliance with personal protective measures during the COVID-19 pandemic in Chile. We consider three possible models underlying adherence: (1) sociodemographic and socioeconomic factors, (2) instrumental factors, and (3) normative factors. We draw on data from a longitudinal nonrepresentative panel study (Study 1, n = 32,304) and a cross-sectional representative survey (Study 2, n = 1,078) to explore the impact of these different factors on personal protective measures compliance. Findings show the strongest support for the role of instrumental and normative factors, in that people who comply with protective measures report to a greater extent that relatives and friends comply too and tend to perceive high risk of COVID-19. We finish by proposing policy recommendations to promote effective strategies to contain the spread of the virus.     

Validating the semantic misattribution procedure as an implicit measure of gender stereotyping

The current research tested the validity of the semantic misattribution procedure (SMP)—a variant of the affect misattribution procedure—as an implicit measure of gender stereotyping. In three studies (N = 604), prime words of gender‐stereotypical occupations (e.g., nurse, doctor) influenced participants' guesses of whether unknown Chinese ideographs referred to male or female names in a stereotype‐congruent manner. Priming scores of gender stereotyping showed high internal consistency and construct‐valid correlations with explicit measures of sexism. Discriminant validity of gender stereotyping scores was tested by investigating relations with priming effects involving grammatical gender (e.g., mother, father). Evidence for discriminant validity was obtained when (1) trials from the two priming measures were presented in a blocked rather than interspersed manner and (2) the measure of stereotypical gender priming preceded the measure of grammatical gender priming. Overall, the SMP showed good psychometric properties and construct validity for the assessment of gender stereotyping.     

Risk-appraisal,outcome and self-efficacy expectancies: Cognitive factors in preventive behaviour related to cancer

Abstract

Health education often attempts to influence or persuade through risk-appraisal of impending danger or harm. Risk: appraisal implies cognitive processes concerning the severity of the threatening event and the probability of its occurrence. In two studies we investigated whether risk factors could adequately predict preventive behaviour with respect to cancer. The tint study concerned the health belief model. the second study the protection motivation theory. Protection motivation theory includes the health belief factors but also self-efficacy expectancy. The most important finding is that risk-appraisal does not predict preventive behaviour adequately: outcome expectancy and self-efficacy expectancy should be included in the prediction of preventive behaviour. In general, our findings suggest the superiority of the protection motivation theory to the health belief model in predicting preventive behaviour with respect to cancer.