12‐Month‐Old Infants Represent Probable Endings of Motion Events

This experiment investigated 12‐month‐old infants' ability to link an event's beginning to its probable ending. Following Csibra, Biro, Koos, and Gergely (2003), infants were habituated to a simple chasing event involving animated balls, and at test saw 2 possible endings: either 1 ball caught the other or failed to do so. Two controls were added to the previous work. First, the total amount of motion was controlled in the test endings; second, the endings were paired with a nonchasing beginning to ensure that behavior at test reflected representation of the event beginning itself. The results replicated Csibra et al.'s finding that infants look longer at the noncatching ending following the chasing beginning; moreover, infants showed no preference for either ending following the no‐chasing beginning. This study supports the claim that infants can calculate the rational ending of a goal‐directed motion event.     

Family touch practices and learning experiences in the museum

ABSTRACT

This paper investigates how family museum visitors crafted learning through interaction with one another and the touch objects of an exhibition. Through a case study of seven families’ interaction, we show how families used touch to bring their interests and resources into dialogue with museum expectations and resources. Using a multimodal approach to analyze observational data, we generate a fine-grained account of differently configured family touch practices and ways of experiencing and knowing objects through their material, sensory tactile and affective qualities. We conclude by highlighting how our findings can inform the design of touch exhibits to support family learning, with attention to engagement, narrative creation, and embodied learning, and point to the paper’s methodological contribution to the analysis of visitor situated real-time interaction and learning in museums.     

Optimizing the Quantity/Quality Trade-Off in Connectome Inference

We demonstrate a meaningful prospective power analysis for an (admittedly idealized) illustrative connectome inference task. Modeling neurons as vertices and synapses as edges in a simple random graph model, we optimize the trade-off between the number of (putative) edges identified and the accuracy of the edge identification procedure. We conclude that explicit analysis of the quantity/quality trade-off is imperative for optimal neuroscientific experimental design. In particular, identifying edges faster/more cheaply, but with more error, can yield superior inferential performance.     

Sponsor-Imposed Publication Restrictions Disclosed on ClinicalTrials.gov

We investigated whether sponsor-imposed publication restrictions for ClinicalTrials.gov trials were reasonable, based on consistency with Good Publication Practice 2 (GPP2). ClinicalTrials.gov trial record data were electronically imported (October 7, 2012) and screened for eligibility (phase 2–4, interventional, recruitment closed, results available, first received for registration after November 10, 2009, any sponsor type, investigators not sponsor employees). Two authors categorized restrictions information as consistent or not consistent with GPP2, resolving discrepancies by consensus. Of the eligible trials (388/484, n = 81,768 participants), 80.7% (313/388) had restrictions disclosed, and 92.5% (311/388) were industry-sponsored. Significantly more trials had restrictions that were consistent with GPP2 than not (74.1% [232/313], n = 55,280 participants vs. 25.9% [81/313], n = 19,677 participants; P < .001). Reasons for inconsistency were insufficient, unclear, or ambiguous information (48.1%, 39/81), sponsor-required approval for publication (35.8%, 29/81), sponsor-required text changes (8.6%, 7/81), and outright bans (7.4%, 6/81). Follow-up of trials with insufficient information and a contact email (response rate, 46.9% [15/32]) revealed 2 additional bans. A total of 776 participants had consented to trials that had publication bans. Many, but not all, sponsor-imposed publication restrictions disclosed on ClinicalTrials.gov may be considered reasonable. Sponsors should ensure restrictions are appropriately disclosed. Volunteers should be alerted to any restrictions before consenting to participate in a clinical trial.     

Beyond Absenteeism: Father Incarceration and Child Development

High rates of incarceration among American men, coupled with high rates of fatherhood among men in prison, have motivated recent research on the effects of parental imprisonment on children’s development. We use data from the Fragile Families and Child Wellbeing Study to examine the relationship between paternal incarceration and developmental outcomes for approximately 3,000 urban children. We estimate cross-sectional and longitudinal regression models that control not only for fathers’ basic demographic characteristics and a rich set of potential confounders, but also for several measures of pre-incarceration child development and family fixed effects. We find significant increases in aggressive behaviors and some evidence of increased attention problems among children whose fathers are incarcerated. The estimated effects of paternal incarceration are stronger than those of other forms of father absence, suggesting that children with incarcerated fathers may require specialized support from caretakers, teachers, and social service providers. The estimated effects are stronger for children who lived with their fathers prior to incarceration but are also significant for children of nonresident fathers, suggesting that incarceration places children at risk through family hardships including and beyond parent-child separation.     

From genes to societies

Research on model organisms has substantially advanced our understanding of aging. However, these studies collectively lack any examination of the element of sociality, an important feature of human biology. Social insects present a number of unique possibilities for investigating social influences on aging and potentially detecting new mechanisms for extremely prolonged, healthy life spans that have evolved naturally. Social evolution has led to life spans in reproductive females that are much longer (up to over 100-fold) than those of males or of nonreproductive worker castes. These differences are particularly dramatic because they are due to environmental influences, as all individuals develop from the same genomes. Social insect colonies consist of semi-autonomous individuals, and the relationship between the colony and the individual creates many interesting predictions in the light of the common theories of aging. Furthermore, the variety of lifestyles of social insects creates the potential for crucial comparative analyses across distinct social systems.     

Partnership Transitions and Maternal Parenting

We use data from the Fragile Families and Child Wellbeing Study (N = 1,975) to examine the association between mothers' partnership changes and parenting behavior during the first five years of their children's lives. We compare coresidential with dating transitions, and recent with more distal transitions. We also examine interactions between transitions and race/ethnicity, maternal education and family structure at birth. Findings indicate that both coresidential and dating transitions were associated with higher levels of maternal stress and harsh parenting; recent transitions had stronger associations than distal transitions. Maternal education significantly moderates these associations, with less educated mothers responding more negatively to instability in terms of maternal stress, and more educated mothers responding more negatively in terms of literacy activities.     

Is Guardian Permission a Barrier to Online Sexual Health Research Among Adolescent Males Interested in Sex With Males?

Institutional review boards (IRBs) that refuse to grant waivers of guardian permission may hinder research to inform needed online sexual health interventions for adolescent males interested in sex with males (AMSM). Information on the challenges of obtaining (or waiving) guardian permission is imperative. In June and July 2017, AMSM (N = 206; ages 14 to 17) in the United States completed an online survey on sexual behaviors, sexually explicit media use, and sexual education exposure/needs. A mixed-methods approach assessed attitudes toward guardian permission for the current survey and future online sexual health intervention research. Logistic regression models assessed differences by “outness” to a guardian. A framework matrix analysis was conducted to summarize, then aggregate, qualitative responses. Findings indicated that most AMSM would not participate if guardian permission was required (current: 83%; future: 87%). Youth who were not out were more likely to say they would not participate (current: adjusted odds ratio [AOR] = 2.8, 95% confidence interval [CI]: 1.2 to 6.8); future: AOR = 4.7, 95% CI: 1.6 to 13.5). Participants reported that guardian permission would be an invasion of their privacy, lead to involuntary outing, and endanger participants. Overall, guardian permission appears to be a barrier to AMSM participation in online sexual health research. Investigators and IRBs should consider alternative practices and policies to facilitate such research.