Worksite characteristics and changes in worksite tobacco-control initiatives. Results from the COMMIT study

Few studies have prospectively examined the characteristics associated with worksite adoption of tobacco-control initiatives. Data were collected as part of the Community Intervention Trial (COMMIT) for Smoking Cessation, which conducted interventions in 11 communities. This smoking cessation intervention was based on community organization principles and delivered through multiple community channels, including worksites, health care providers, the media, and cessation resources. This article reports results from telephone interviews of intervention community worksites having 50 or more employees, conducted at baseline and the end of the intervention period. Among worksites that responded to both baseline and final surveys, 83% had not adopted a smoke-free policy at baseline, and 61% did not offer any cessation aid or quitting resources at baseline. By the final survey, 34% of those with no smoking ban at baseline had become smoke-free, and 36% of those offering no cessation assistance at baseline were offering cessation resources at the follow-up. The prevalence of policy adoption was higher among worksites employing more female employees and offering other health-promotion activities; manufacturing businesses were significantly less likely than businesses other than service and wholesale/retail businesses to adopt policies. Adoption of cessation programs was significantly more likely among worksites employing 100 to 249 workers, compared with those employing 50 to 99 workers; those predominantly employing men; those offering other types of health-promotion activities; and those with a higher rate of turnover. These results provide important information about the characteristics of worksites likely to engage in tobacco-control efforts. Health educators and others may choose to target those worksites most ready for adoption of tobacco control policies and programs, as indicated by these findings.     

Input to verb learning: Evidence for the plausibility of syntactic bootstrapping.

The theory of syntactic bootstrapping proposes that children use the syntactic frames in which verbs are presented as a source of information about their meaning. The purpose of this study was to investigate the extent to which maternal type and diversity of verb frames are consistent with the requirements of that theory. The uses of 25 common verbs in the speech of 57 mothers to their 1- to 2-year-old children were tabulated and parsed for syntactic frame. Analyses revealed 2 major findings concerning the use of verbs in child-directed speech: (a) Verbs in different semantic categories appear in different syntactic environments, and (b) individual verbs are distinguished by the set of frames in which they appear. These findings support the plausibility of the syntactic bootstrapping hypothesis by demonstrating that children's input provides the structural cues to verb meaning that the syntactic bootstrapping procedure requires. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The correctness of the Schorr-Waite list marking algorithm

Summary This paper presents a relatively simple proof of a nontrivial algorithm for marking all the nodes of a list structure. The proof separates properties of the algorithm from properties of the data on which it operates and is a significant application of the method of intermittent assertions.(This paper grew out of an earlier version which was submitted to this journal on October 16, 1974)     

Predictors of supportive coparenting after relationship dissolution among at-risk parents.

Supportive coparenting after relationship dissolution is associated with increased father involvement which can buffer against the negative effects of parental relationship dissolution. Low-income, at-risk families are much more likely to experience relationship dissolutions; hence, supportive coparenting after dissolution is particularly important in these families. We examined whether relationship (commitment and quality) and child (difficult temperament and gender) characteristics predicted initial levels of, and change in, supportive coparenting after relationship dissolution in the Fragile Families and Child Wellbeing Study (N = 1,603). We used structural equation modeling of latent growth curves to examine four time points collected at the focal child's birth and first, third, and fifth birthdays. Ninety-percent of the mothers had nonmarital births, and about three-quarters had a high school diploma or less education. Overall, supportive coparenting decreased over time. Mothers in more committed relationships prior to the dissolution initially had significantly lower supportive coparenting. But over time, mothers who had been in more committed relationships increased in supportive coparenting. Mothers who had been in higher quality relationships prior to dissolution initially reported more supportive coparenting. At each time point, if a mother was romantically involved with a new partner, she reported significantly lower supportive coparenting compared to mothers who were single. With regard to child characteristics, mothers who reported their child as more difficult had significantly lower initial supportive coparenting. Similar results for fathers are discussed. Overall, the relationship characteristics of parents were important predictors of supportive coparenting both initially and over time. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

A critique of Bem's "Exotic Becomes Erotic" theory of sexual orientation.

Two critiques of D. J. Bem's (see record 1996-01742-006) "Exotic Becomes Erotic" (EBE) theory of sexual orientation are presented. First, the core proposition of EBE theory is considered; that is, the idea that adults are erotically attracted to the gender-based class of peers (males or females) who were dissimilar or unfamiliar to them in childhood. Studies cited by Bem and additional research show that EBE theory is not supported by scientific evidence. Second, Bem's claim that his theory applies equally to both sexes is questioned; instead the argument that it neglects and misrepresents women's experiences is made. Bem's conceptualization of erotic desire and his analysis of gender nonconformity illustrate this problem. It is suggested that different theories may be needed to explain the development of men's and women's sexual orientation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Termination detection for distributed computations

A simple derivation of a general solution to the problem of detecting the termination of a distributed computation is presented.     

Hydrophilic PVC composite films obtained by in situ polymerization, 1. Swelling studies

In order to introduce a monomer into a PVC matrix, the swelling behavior of PVC films was tested in four solvents (acetone, methyl ethyl ketone, benzene, and toluene) and in acrylic acid solutions in acetone (10, 25 and 50 wt.-%) containing 0.1 wt.-% azoisobutyronitrile. The type of transport, diffusion and permeation coefficients, sorption kinetics and Arrhenius parameters are discussed.