Delusion‐proneness or miscomprehension? A re‐examination of the jumping‐to‐conclusions bias

Previous research has consistently shown that individuals with delusions typically exhibit a jumping‐to‐conclusions (JTC) bias when administrated the probabilistic reasoning ‘beads task’ (i.e., decisions made on limited evidence and/or decisions over‐adjusted in light of disconfirming evidence). However, recent work in this area has indicated that a lack of comprehension of the task may be confounding this finding. The purpose of the present study was to evaluate the influence of task administration, delusion‐proneness, and miscomprehension on the elucidation of the JTC bias. A total of 92 undergraduate university students were divided into one of two task conditions (i.e., non‐computerised and computerised) and were further identified as either delusion‐prone or non‐delusion‐prone and as comprehending or non‐comprehending the task. Overall, 25% of the sample demonstrated a JTC bias, and just over half made illogical responses consistent with a failure to comprehend the task. Qualitative evidence of comprehension revealed that these ‘illogical responses’ were being driven by a misunderstanding of task instructions. The way the task was administrated and levels of delusion‐proneness did not significantly influence JTC. However, miscomprehending participants were significantly more likely to exhibit the bias than those who did comprehend. These results suggest that miscomprehension rather than delusion‐proneness may be driving the JTC bias, and that future research should include measures of miscomprehension.     

Monkey lipsmacking develops like the human speech rhythm

Across all languages studied to date, audiovisual speech exhibits a consistent rhythmic structure. This rhythm is critical to speech perception. Some have suggested that the speech rhythm evolved de novo in humans. An alternative account--the one we explored here--is that the rhythm of speech evolved through the modification of rhythmic facial expressions. We tested this idea by investigating the structure and development of macaque monkey lipsmacks and found that their developmental trajectory is strikingly similar to the one that leads from human infant babbling to adult speech. Specifically, we show that: (1) younger monkeys produce slower, more variable mouth movements and as they get older, these movements become faster and less variable; and (2) this developmental pattern does not occur for another cyclical mouth movement--chewing. These patterns parallel human developmental patterns for speech and chewing. They suggest that, in both species, the two types of rhythmic mouth movements use different underlying neural circuits that develop in different ways. Ultimately, both lipsmacking and speech converge on a ~5 Hz rhythm that represents the frequency that characterizes the speech rhythm of human adults. We conclude that monkey lipsmacking and human speech share a homologous developmental mechanism, lending strong empirical support to the idea that the human speech rhythm evolved from the rhythmic facial expressions of our primate ancestors.     

Mental Health,Belief Deficit Compensation,and Paranormal Beliefs

The present study examined the relationship between religious and nonreligious paranormal beliefs and mental health, as well as the possibility that nonreligious subjects compensate for a lack of identification with traditional religion by increased nonreligious paranormal beliefs. Subjects were 80 undergraduates categorized as religious or nonreligious on the basis of scores on the Traditional Religion subscale of the Paranormal Belief Scale. Religious subjects had significantly higher total paranormal belief scores than nonreligious subjects. Those adopting religious paranormal beliefs were actually somewhat more likely to adopt other nonreligious paranormal beliefs. The failure of nonreligious subjects to compensate fully for this traditional religious belief deficit was reflected in their mental health ratings on the Langer's Mental Health Scale (Langer, 1962). Paranormal beliefs were found to be negatively correlated with reported symptoms of psychopathology, supporting the formulation that paranormal beliefs may serve to ensure psychic integrity by acting as “self-serving cognitive biases.”     

Threats to Moral Identity: Testing the Effects of Incentives and Consequences of One's Actions on Moral Cleansing

Individuals engage in moral cleansing, a compensatory process to reaffirm one's moral identity, when one's moral self-concept is threatened. However, too much moral cleansing can license individuals to engage in future unethical acts. This study examined the effects of incentives and consequences of one's actions on cheating behavior and moral cleansing. Results found that incentives and consequences interacted such that unethical thoughts were especially threatening, resulting in more moral cleansing, when large incentives to cheat were present and cheating explicitly harmed others. Implications are discussed in terms of ethics training, using incentives as motivators, and the depersonalized norms of science.     

Childhood Sexual Assault,Quality of Life,and Psychiatric Comorbidity in Veterans With Military and Civilian Sexual Trauma

Veterans with military sexual trauma (MST) are at risk for a variety of psychiatric conditions, including posttraumatic stress disorder (PTSD) and depression. Survivors of MST are also likely to experience diminished quality of life (QoL). Individuals with higher lifetime incidence of sexual trauma may also be at increased risk for poorer outcomes in QoL and psychiatric symptomatology. The differences in psychological sequelae among those who have experienced sexual trauma as children, and those whose sexual trauma exposure is limited to adulthood are relatively understudied. The majority of sexual trauma literature has focused primarily on civilian trauma, and comparatively few studies have specifically examined psychosocial sequelae (e.g., QoL) in veterans with MST. This study examined how childhood sexual abuse (CSA) affects overall QoL as well as severity of PTSD and depressive symptoms. Veterans who reported CSA had significantly greater depression symptom severity than veterans who did not. No significant differences in PTSD symptom severity or QoL were found between veterans who did and did not report CSA. Results highlight the need for further examination of the relationship between CSA and depression in veterans with MST-related PTSD who also report CSA.     

Attention in Children: Conceptual and Methodological Issues

This commentary discusses conceptual and methodological issues in the assessment of attention in children. The five articles in this special issue are important advances in the study of attention in children with brain-related disorders. They provide important guidelines for future studies in this area: specification of the underlying model of attention, selection of tasks according to the model, and the use of multiple tasks in well-defined clinical populations.     

Altered working memory capacity for social threat words in high versus low social anxiety

ABSTRACT

Background and objectives: Differences in working memory capacity (WMC) have been suggested in individuals with high levels of social anxiety (SA). Specifically, these individuals may preferentially maintain socially threatening material in working memory.

Design and methods: We adapted the digit span task to a series of word span tasks. We assessed WMC for lists of words that varied in terms of their threat-relatedness, in individuals either high or low in SA.

Results: Experiment 1 revealed reduced WMC for socially threatening words in those with high compared to low SA. Importantly, this relative reduction in WMC was driven by the low SA group showing expanded capacity for socially threatening words relative to neutral or generally threatening words. Furthermore, reductions in WMC for social threat were uniquely predicted by SA, and not by other theoretically related constructs such as state general anxiety, trait general anxiety, or depression. Experiment 2 showed that the semantic similarity of the words within each list was not responsible for the differences in WMC between list type or SA group.

Conclusions: Our findings suggest that individuals high in SA may fail to upregulate WMC for social information due to the activation of, or rumination upon, socially threatening concepts.     

An Island in a Sea of Development: An Examination of Place Attachment,Activity Type,and Crowding in an Urban National Park

ABSTRACT

As more people move to urban areas there will be increased pressure on existing green spaces to offer places for recreation, contemplation, historic interpretation, exercise, and nature appreciation. Development and a rise in population has led to too few public recreation sites available in many regions of the world resulting in unsustainable pressure being applied to parks. The objective of this study was to examine how place attachment may be related to type and frequency of park use and management issues regarding crowding. Data for this study were obtained via intercept survey of a random sample of visitors (N = 1088) at a park in the Metro Atlanta area, Georgia. Results suggest that place attachment had a significant relationship with frequency of visits and types of activities that visitors engaged in. There was, however, no significant relation between place attachment and crowding. First-time visitors and less frequent visitors felt most crowded, which may support the idea that the most frequent visitors expect it to be crowded and are, therefore, less sensitive to it. This study sheds light on how visitors to an urban park view their experience while recreating, and may inform policies and regulations that will help mitigate the unique management situations that urban parks present.     

Appearances,antirealism, and Aristotle

Summary Nussbaum misconstrues the difference between Plato and Aristotle over what is real for a debate over a conception of truth. She seems to mistake Aristotle's arguments against Plato' version of realism as an argument against realism per se, though the texts do not permit such a reading. She claims Aristotle is convinced that realism involves a fatal failure of reference, yet she produces not a single text where Aristotle is even remotely concerned about such a failure of reference given the commitments of realism. And nowhere is the crucial question of the relationship between Aristotle's antirealism and his method of appearances explicitly addressed or resolved.Nussbaum offers us a fashionable Aristotle. I have argued that, far from being attractive and obviously right on a deep and recent metaphysuical debate, Nussbaum's Aristotle is confused and inconsistent and thus that it is a good thing the texts do not support such a characterization.