Evolution, stress, and sensitive periods: the influence of unpredictability in early versus late childhood on sex and risky behavior

According to a recent evolutionary life history model of development proposed by Ellis, Figueredo, Brumbach, and Schlomer (2009), growing up in harsh versus unpredictable environments should have unique effects on life history strategies in adulthood. Using data from the Minnesota Longitudinal Study of Risk and Adaptation, we tested how harshness and unpredictability experienced in early childhood (age 0-5) versus in later childhood (age 6-16) uniquely predicted sexual and risky behavior at age 23. Findings showed that the strongest predictor of both sexual and risky behavior was an unpredictable environment between ages 0 and 5. Individuals exposed to more unpredictable, rapidly changing environments during the first 5 years of life displayed a faster life history strategy at age 23 by having more sexual partners, engaging in more aggressive and delinquent behaviors, and being more likely to be associated with criminal activities. In contrast, exposure to either harsh environments or experiencing unpredictability in later childhood (age 6-16) was, for the most part, not significantly related to these outcomes at age 23. Viewed together, these findings show that unpredictable rather than merely harsh childhood environments exert unique effects on risky behavior later in life consistent with a faster life history strategy. The findings also suggest that there is a developmentally sensitive period for assessing environmental unpredictability during the first 5 years of life.     

Trust and responsiveness in strain-test situations: a dyadic perspective

In this behavioral observation study, the authors tested predictions derived from various trust models concerning how individuals who are high vs. low in chronic trust perceive and behave during strain-test discussions with their romantic partners. Partners in 92 married/cohabitating couples identified and discussed 2 major strain-test issues in their relationship. Each partner (when in the role of asker) identified something she or he really wanted to do or accomplish that required the greatest sacrifice by his or her partner (in the responding role). Each videotaped discussion was then rated by trained coders. The results revealed that (a) high trust responders were more accommodating during the strain-test discussions than low trust responders; (b) high trust askers were more open/collaborative with the accommodation they received during the discussions than low trust askers; (c) high trust askers overestimated the amount of accommodation they received from their responding partners (relative to coder's ratings); (d) when in discussions that were more threatening, high trust askers showed a correction effect by reporting larger pre- to postdiscussion increases in state trust; and (e) when asked to make larger sacrifices, high trust responders showed a similar correction effect by displaying greater accommodation. These findings are discussed in terms of mutual responsiveness processes in relationships.     

Marriage at the Summit: Response to the Commentaries

This article serves as a response to the 13 commentaries on the target article, which introduced the suffocation model of marriage in America. This reply has four main sections. First, it presents an elaborated version of the suffocation model that was inspired by the commentaries. Second, it addresses three areas of significant disagreement that emerged as we digested the commentaries. Third, it examines the circumstances under which being instrumental for one's spouse's needs benefits the self. And fourth, it takes strides toward the development of a mathematically formal version of the suffocation model. It concludes with a discussion of the ways in which policymakers, clinicians, and individual Americans can capitalize upon the suffocation model to strengthen marriage and, in doing so, bolster personal well-being.     

Do Partner Attachment Behaviors Moderate Avoidant Conflict-Resolution Styles and Relationship Self-Regulation?

ABSTRACT

Relationship self-regulation refers to the “work” partners put in to keep their relationships healthy. Past relationship self-regulation research has not taken into account distal variables that may affect it, such as respondents’ own and parental avoidant couple conflict-resolution styles. Using data from 4,456 people in their first marriages who completed the RELATionship Evaluation (RELATE) (Busby, Holman, & Taniguchi, 2001 Busby, D. M., Holman, T. B., & Taniguchi, N. (2001). Relate: Relationship evaluation of the individual, family, cultural, and couple contexts. Family Relations, 50, 308–316.[Crossref], [Web of Science ®] , [Google Scholar]), the current study found a positive correlation between parents’ couple avoidant conflict-resolution style and respondents’ avoidant couple conflict-resolution style. Respondents’ avoidant couple conflict-resolution style was also negatively correlated with relationship self-regulation. Perception of partners’ secure attachment behaviors, however, had a significant strong relationship with respondents’ ability to do relationship self-regulation.     

Left-Right Differences on Timed Motor Examination in Children

Age-related change in the difference between left- and right-side speed on motor examination may be an important indicator of maturation. Cortical maturation and myelination of the corpus callosum are considered to be related to increased bilateral skill and speed on timed motor tasks. We compared left minus right foot, hand, and finger speed differences using the Revised Physical and Neurological Assessment for Subtle Signs (PANESS; Denckla, 1985 Denckla, M. B. 1985. Revised neurological examination for subtle signs. Psychopharmacology Bulletin, 21: 773–779. [PubMed], [Web of Science ®] , [Google Scholar]); examining 130 typically developing right-handed children (65 boys, 65 girls) ages 7–14. Timed tasks included right and left sets of 20 toe taps, 10 toe-heel alternation sequences, 20 hand pats, 10 hand pronate-supinate sets, 20 finger taps, and 5 sequences of each finger-to-thumb apposition. For each individual, six difference scores between left- and right-sided speeded performances of timed motor tasks were analyzed. Left-right differences decreased significantly with age on toe tapping, heel-toe alternations, hand pronation-supination, finger repetition, and finger sequencing. There were significant gender effects for heel-toe sequences (boys showing a greater left-right difference than girls), and a significant interaction between age and gender for hand pronation-supination, such that the magnitude of the left-right difference was similar for younger, compared with older girls, while the difference was significantly larger for younger, compared to older boys. Speed of performing right and left timed motor tasks equalizes with development; for some tasks, the equalization occurs earlier in girls than in boys.     

A Rose Blooms in the Winter: The Tradition of the Hortus Conclusus and its Significance as a Devotional Emblem

The hortus conclusus, or the “garden enclosed,” is a motif of biblical origin that images the Virgin Mary as a cloistered garden. Gaining popularity in the early medieval period, the Marian hortus conclusus remained the property of the Catholic church after the Reformation. There it briefly thrived, reaching its apogee in the early modern period as the eponymous subject of Henry Hawkins’ emblem book, Partheneia Sacra. The Virgin in (and as) the garden still lives a half‐life today, continuing to appear without our recognizing it in medieval and Renaissance artwork, in hymns, in the names of flowers, and in prayers. Where it is known, the Marian hortus conclusus is usually perceived as a Catholic object of adoration, but its enduring nature suggests that it holds promise as a catholic subject of devotion as well.     

Women's preferences for male behavioral displays change across the menstrual cycle

Abstract— Women prefer both the scent of symmetrical men and masculine male faces more during the fertile (late follicular and ovulatory) phases of their menstrual cycles than during their infertile (e.g., luteal) phases. Men's behavioral displays in social settings may convey signals that affect women's attraction to men even more strongly. This study examined shifts in women's preferences for these behavioral displays. A sample of 237 normally ovulating women viewed 36 or 40 videotaped men who were competing for a potential lunch date and then rated each man's attractiveness as a short-term and a long-term mate. As predicted, women's preference for men who displayed social presence and direct intrasexual competitiveness increased on high-fertility days relative to low-fertility days, but only in a short-term, not a long-term, mating context. These findings add to the growing literature indicating that women's mate preferences systematically vary across the reproductive cycle.     

Response-specific sources of dual-task interference in human pre-motor cortex

It is difficult to perform two tasks at the same time. Such performance limitations are exemplified by the psychological refractory period (PRP): when participants make distinct motor responses to two stimuli presented in rapid succession, the response to the second stimulus is increasingly slowed as the time interval between the two stimuli is decreased. This impairment is thought to reflect a central limitation in selecting the appropriate response to each stimulus, but not in perceptually encoding the stimuli. In the present study, it was sought to determine which brain regions are specifically involved in response selection under dual-task conditions by contrasting fMRI brain activity measured from a response selection manipulation that increased dual-task costs, with brain activity measured from an equally demanding manipulation that affected perceptual visibility. While a number of parieto-frontal areas involved in response selection were activated by both dual-task manipulations, the dorsal pre-motor cortex, and to a lesser extent the inferior frontal cortex, were specifically engaged by the response selection manipulation. These results suggest that the pre-motor cortex is an important neural locus of response selection limitation under dual-task situations.