Learn locally, think globally. Exemplar variability supports higher-order generalization and word learning

Research suggests that variability of exemplars supports successful object categorization; however, the scope of variability's support at the level of higher-order generalization remains unexplored. Using a longitudinal study, we examined the role of exemplar variability in first- and second-order generalization in the context of nominal-category learning at an early age. Sixteen 18-month-old children were taught 12 categories. Half of the children were taught with sets of highly similar exemplars; the other half were taught with sets of dissimilar, variable exemplars. Participants' learning and generalization of trained labels and their development of more general word-learning biases were tested. All children were found to have learned labels for trained exemplars, but children trained with variable exemplars generalized to novel exemplars of these categories, developed a discriminating word-learning bias generalizing labels of novel solid objects by shape and labels of nonsolid objects by material, and accelerated in vocabulary acquisition. These findings demonstrate that object variability leads to better abstraction of individual and global category organization, which increases learning outside the laboratory.     

Holding a manual response sequence in memory can disrupt vocal responses that share semantic features with the manual response

Holding an action plan in memory for later execution can delay execution of another action if the actions share a similar (compatible) feature. This compatibility interference (CI) occurs for actions that share the same response modality (e.g., manual response). We investigated whether CI can generalize to actions that utilize different response modalities (manual and vocal). In three experiments, participants planned and withheld a sequence of key-presses with the left- or right-hand based on the visual identity of the first stimulus, and then immediately executed a speeded, vocal response (‘left’ or ‘right’) to a second visual stimulus. The vocal response was based on discriminating stimulus color (Experiment 1), reading a written word (Experiment 2), or reporting the antonym of a written word (Experiment 3). Results showed that CI occurred when the manual response hand (e.g., left) was compatible with the identity of the vocal response (e.g., ‘left’) in Experiment 1 and 3, but not in Experiment 2. This suggests that partial overlap of semantic codes is sufficient to obtain CI unless the intervening action can be accessed automatically (Experiment 2). These findings are consistent with the code occupation hypothesis and the general framework of the theory of event coding (Behav Brain Sci 24:849–878, 2001a; Behav Brain Sci 24:910–937, 2001b).     

The moral psychology of rationing among physicians: the role of harm and fairness intuitions in physician objections to cost-effectiveness and cost-containment

Introduction

Physicians vary in their moral judgments about health care costs. Social intuitionism posits that moral judgments arise from gut instincts, called “moral foundations.” The objective of this study was to determine if “harm” and “fairness” intuitions can explain physicians’ judgments about cost-containment in U.S. health care and using cost-effectiveness data in practice, as well as the relative importance of those intuitions compared to “purity”, “authority” and “ingroup” in cost-related judgments.

Methods

We mailed an 8-page survey to a random sample of 2000 practicing U.S. physicians. The survey included the MFQ30 and items assessing agreement/disagreement with cost-containment and degree of objection to using cost-effectiveness data to guide care. We used t-tests for pairwise subscale mean comparisons and logistic regression to assess associations with agreement with cost-containment and objection to using cost-effectiveness analysis to guide care.

Results

1032 of 1895 physicians (54%) responded. Most (67%) supported cost-containment, while 54% expressed a strong or moderate objection to the use of cost-effectiveness data in clinical decisions. Physicians who strongly objected to the use of cost-effectiveness data had similar scores in all five of the foundations (all p-values?>?0.05). Agreement with cost-containment was associated with higher mean “harm” (3.6) and “fairness” (3.5) intuitions compared to “in-group” (2.8), “authority” (3.0), and “purity” (2.4) (p?<?0.05). In multivariate models adjusted for age, sex, region, and specialty, both “harm” and “fairness” were significantly associated with judgments about cost-containment (OR?=?1.2 [1.0-1.5]; OR?=?1.7 [1.4-2.1], respectively) but were not associated with degree of objection to cost-effectiveness (OR?=?1.2 [1.0-1.4]; OR?=?0.9 [0.7-1.0]).

Conclusions

Moral intuitions shed light on variation in physician judgments about cost issues in health care.

     

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.     

Does John Henry Newman Have a Theo‐Drama?

The essay surveys Newman's work in literary drama, from an early essay on Aristotle's Poetics to his adaptation of Roman comedies for production at the Oratory School, in order to approach his affinities with Hans Urs von Balthasar's theological dramatic theory. Newman does not find a Balthasarian theo‐drama via literary drama – perhaps because he was not properly exposed to medieval religious drama – but scattered dramatic analogies in his history writing suggest that he undertakes a theo‐drama in that genre. Von Balthasar and Newman employ dramatic analogies to reject chiliastic apocalyptic and foster ‘keromatic’ apocalyptic.     

Pacifism, Just War, and Self-Defense

This essay distinguishes two main forms of pacifism, personal pacifism and political pacifism. It then contrasts the views on self-defense of political pacifism and just war theory, paying special attention to notions of the state and sovereignty.     

Protection,payback, or both? Emotional and motivational mechanisms underlying avoidance by victims of transgressions

In the wake of an interpersonal offense, victims often feel motivated to avoid their perpetrators, and the more severe the offense, the more pronounced this motivation is. On the surface, avoidance appears to serve a self-protective function such that victims, compelled by a sense of fear and apprehension, withdraw from their wrongdoers to prevent further harm. However, avoidance might also serve a retaliatory purpose in which victims shun their offenders out of anger and hostility, using interpersonal aloofness as a means of payback. In the present pair of studies, we examined victims’ self-reports of recent offense experiences and tested the mediating roles of fear and anger in the relationship between offense severity and avoidance motivations. Study 1 revealed that anger, not fear, was the emotion that mediated this relationship. Study 2 replicated this finding and also showed that the link between anger and avoidance was mediated both by revenge and self-protection motives, which demonstrates the complex nature of avoidance following a transgression.     

Locus of Control Beliefs Mediate the Relationship Between Religious Functioning and Psychological Health

Theistic and spiritually based beliefs and behaviors have been demonstrated to consistently predict physical and mental health, although the psychological processes underlying these relationships are unclear. This study investigated associative relationships and pathways of mediation between religious functioning, locus of control (LOC) and health. The sample consisted of 122 Christians (79 women, 43 men) who were predominately Catholic, ranging in age from 18 to 80 (M = 45.47, SD = 15.0). Participants were recruited from churches in the Western suburbs of Melbourne, Australia, and completed a questionnaire package measuring (1) psychological and physical health, (2) the religious variables of awareness of God, instability and impression management, and (3) God, internal and external LOC domains. Results indicated that awareness of God and internal LOC were associated with better health, whereas external LOC and instability were associated with poorer health. God LOC and impression management were not significantly associated with health. Sobel tests were used to analyse mediation hypotheses. Internal LOC was found to mediate the relationship between awareness of God and better psychological health, and external LOC was found to mediate the relationship between instability and poorer psychological health. These findings are of considerable clinical significance.     

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.