Sedentary antlion larvae (Neuroptera: Myrmeleontidae) use vibrational cues to modify their foraging strategies

Learning abilities are exhibited by many animals, including insects. However, sedentary species are typically believed to have low capacities and requirements for learning. Despite this view, recent studies show that even such inconspicuous organisms as larval antlions, which employ an ambush predation strategy, are capable of learning, although their learning abilities are rather simple, i.e., limited to the association of vibrational cues with the arrival of prey. This study demonstrates, for the first time, that antlion larvae can use vibrational cues for complex modifications of their foraging strategies. Specifically, antlion larvae rapidly learn to differentiate between the vibrational cues associated with prey of different sizes, and they save resources by ignoring smaller prey in favour of larger, more energetically profitable prey. Moreover, antlion larvae can learn to associate vibrational cues with the loss of their prey, and they respond by burying their victims under the sand more often and more rapidly than do individuals with no opportunities to form such associations. These findings provide not only new insights into the cognitive abilities of animals but also support for the optimal foraging strategy concept, suggesting the importance of maximizing fitness output by balancing the costs and benefits of alternative foraging strategies.     

Not as Different as We Want to Be: Attitudinally Consistent Trait Desirability Leads to Exaggerated Associations Between Personality and Sociopolitical Attitudes

Research connecting sociopolitical attitudes to personality typically relies exclusively on self‐report measures of personality. A recently discovered mechanism of bias in self‐reports highlights a particular challenge for this approach. Specifically, individuals tend to report exaggerated levels of a trait to the extent that they view that trait as desirable. In a community sample of 443 participants, differences in sociopolitical attitudes were associated with differences in the extent to which individuals provided biased self‐reports for a given trait (relative to trait levels indicated by peer‐report or an objective measure) as well as differences in views of the desirability of that trait. Further, the tendency to misrepresent traits in a manner consistent with one's sociopolitical attitudes was mediated by differences in views of trait desirability. Thus, although meaningful personality differences exist among those with differing sociopolitical attitudes, those differences may not be as large as people with opposing sociopolitical attitudes might like them to be.     

Risk and Resilience Factors in Families Under Ongoing Terror Along the Life Cycle

Families of unarmed civilians who live in warzones at political conflict areas are at risk of exposure to traumatic ongoing terrorism (OGT). This paper focuses on families living at the political conflict area by the border of the Gaza Strip at southwestern Israel, who have experienced OGT of missile fire for a decade and a half. Case examples illustrate the nuances and details of traumatic events, such as massive bombing, life threatening situations, evacuation, threat to and loss of life of family members and close friends, and their implications on the family system along life span. Members of these families are at risk of posttraumatic reactions and maladaptive system functioning in relation to the traumatic context of their specific life cycle stage. However, some families have shown potential for developing resilience, related to three main dimensions: belief system, organizational patterns, and communication channels. The objective of the present paper is to shed light, by evidence of families exposed to OGT, on risk and resilience factors affecting a family’s ability to overcome trauma throughout the lifecycle.     

Multicategorical spline model for item response theory

Additional information contained in incorrect responses calls for a multicategorical rather than a binary analysis of multiple choice data. A nonparametric divided-by-total model for joint maximum likelihood estimation of probability-of-choice functions (for particular responses) and of latent ability is proposed. The model approximates probability functions by rational splines. Some illustrative examples of real test data analysis and the results of a Monte Carlo study are presented.The research in this paper was supported by the National Sciences and Engineering Research Council of Canada Grants OGP0105521 and APA 320 awarded to the first and the second author, respectively. The authors are indebted to R. Melzack and A. Baker for making available the data analyzed in this paper. We would also like to thank J. McKenna and B. Cont for their assistance in editing this paper.     

Using a threat of divorce for maintaining family homeostasis within families in extreme distress (FED)

This paper describes a phenomenon of using a threat to divorce by families in extreme distress (FED) as a way of maintaining family homeostasis; that is, using a threat to divorce but never really implementing it. By relating to processes, such as social exchange and attachment, that often take place in the decision-making of divorce, we try to understand why those families choose to use the threat, thereby explaining this phenomenon. Using components of defining family boundaries, excitement and power struggle, we are thus able to better understand the existence of the phenomenon among FED.     

Does Family Cohesion Predict Children's Effort? The Mediating Roles of Sense of Coherence,Hope, and Loneliness

The degree of cohesion and support within families has often been considered a predictor of students' effort-investment and success in school. The objectives of this study are to examine the roles of personal factors (i.e., sense of coherence and hopeful thinking) as well as interpersonal factors (i.e., loneliness) in mediating the relationship between family cohesion and effort. The sample consists of 1719 elementary school children (781 boys and 938 girls) from the fifth and six grades (mean age = 10.25, SD = 0.70) of 29 elementary schools in central Israel. Students answered study questionnaires in the middle of their academic year. Analyses utilizing hierarchical multiple regression and Hayes' bootstrapping approach (PROCESS; Preacher & Hayes, 2008) were used. The results support the distinctive contribution of family cohesion and the mediating roles of sense of coherence and hope (as protective factors) as well as loneliness (as a risk factor) in predicting students' school effort. This study has important educational implications, emphasizing the value of promoting hopeful thinking and coping with loneliness in helping students to thrive in their studies.     

Speech and language functions that require a functioning Broca's area

A number of previous studies have indicated that Broca's area has an important role in understanding and producing syntactically complex sentences and other language functions. If Broca's area is critical for these functions, then either infarction of Broca's area or temporary hypoperfusion within this region should cause impairment of these functions, at least while the neural tissue is dysfunctional. The opportunity to identify the language functions that depend on Broca's area in a particular individual was provided by a patient with hyperacute stroke who showed selective hypoperfusion, with minimal infarct, in Broca's area, and acutely impaired production of grammatical sentences, comprehension of semantically reversible (but not non-reversible) sentences, spelling, and motor planning of speech articulation. When blood flow was restored to Broca's area, as demonstrated by repeat perfusion weighted imaging, he showed immediate recovery of these language functions. The identification of language functions that were impaired when Broca's area was dysfunctional (due to low blood flow) and recovered when Broca's area was functional again, provides evidence for the critical role of Broca's area in these language functions, at least in this individual.     

"Motherhood starts in prison": the experience of motherhood among women in prison

This study aims to explore the way in which women prisoners in Israel experience motherhood in prison and construct their motherhood after being released. In-depth interviews were conducted with 9 women, and the data were analyzed according to the phenomenological approach. The qualitative methodology generated 5 main themes: (a) motherhood in prison as a motive for survival; (b) the sense of failure experienced by mothers in prison; (c) coping versus avoidance in the mother-child relationship during imprisonment; (d) motherhood in prison as a motive for change; and (e) the transition from questioning the right to be a mother to redeeming motherhood. The 5 themes were organized into a model that depicts the process of becoming a mother in prison and the move toward mending the experience of motherhood. The findings indicate that side by side with the traumatic experiences of prison are other aspects that allow for growth and rehabilitation. The discussion focuses on 2 main issues that evolved from the findings: the reasons for the change in motherhood that occurs during imprisonment and the aspects of prison that enable this change.     

They heard a cry: psychosocial resources moderate perception of others' distress

Two studies tested whether psychosocial resources affect perception of another's distress. Participants' had their resources depleted, left unchanged, or boosted by elaborately recalling either someone who had betrayed them, a neutral person, or a close and trusted other, respectively. Participants then listened to disturbing baby cries, and rated how much distress the cries conveyed. As predicted, participants who recalled a betrayal subsequently heard the cries as conveying more distress than did other participants (Study 1). However, recalling a betrayal did not amplify cry ratings if, prior to cry rating, betrayal‐related thoughts and feelings were disclosed (Study 2). The moderating effect of disclosure on cry ratings indicates that boosting resources (disclosure) can counteract the effects of resource depletion (betrayal). Results in both studies remained significant even after controlling for mood. This research is the first to show that social contexts, and emotional disclosure, each affects perception of others' distress. Copyright © 2007 John Wiley & Sons, Ltd.