Visual assessment of matrix-variate normality

In recent years, the analysis of three-way data has become ever more prevalent in the literature. It is becoming increasingly common to analyse such data by means of matrix-variate distributions, the most prevalent of which is the matrix-variate normal distribution. Although many methods exist for assessing multivariate normality, there is a relative paucity of approaches for assessing matrix-variate normality. Herein, a new visual method is proposed for assessing matrix-variate normality by means of a distance–distance plot. In addition, a testing procedure is discussed to be used in tandem with the proposed visual method. The proposed approach is illustrated via simulated data as well as an application on analysing handwritten digits.     

Statistical word segmentation: Anchoring learning across contexts

The present experiments were designed to assess infants' abilities to use syllable co-occurrence regularities to segment fluent speech across contexts. Specifically, we investigated whether 9-month-old infants could use statistical regularities in one speech context to support speech segmentation in a second context. Contexts were defined by different word sets representing contextual differences that might occur across conversations or utterances. This mimics the integration of information across multiple interactions within a single language, which is critical for language acquisition. In particular, we performed two experiments to assess whether a statistically segmented word could be used to anchor segmentation in a second, more challenging context, namely speech with variable word lengths. The results of Experiment 1 were consistent with past work suggesting that statistical learning may be hindered by speech with word-length variability, which is inherent to infants' natural speech environments. In Experiment 2, we found that infants could use a previously statistically segmented word to support word segmentation in a novel, challenging context. We also present findings suggesting that this ability was associated with infants' early word knowledge but not their performance on a cognitive development assessment.     

Estimating Nantucket’s Effective Population

Population Research and Policy Review - This paper extends demographers’ traditional approaches to estimating local populations using symptomatic data. We augmented those approaches in order...     

Condom use,frequency of sex,and number of partners: Multidimensional characterization of adolescent sexual risk‐taking

Sexual health research often relies on single risk indicators. However, multi‐variable composites may better capture the underlying construct of risk‐taking. Latent Profile Analysis identified subgroups based on condom use consistency, partner numbers, and sex frequency among 605 adolescents. Three profiles were identified for each of grades 8 to 10 (Condom Users, Few Partners, and Risk‐Takers) and 4 in grades 11 and 12 (Condom Users, One Partner, Two Partners, and Risk‐Takers). Inconsistent condom use groups reported more non‐condom (and often less effective) birth control use and STD and pregnancy histories. Females had greater representation in the Few Partners, One Partners, and Two Partners groups, which also contained increasing proportions of participants in each subsequent year. Males had greater representation in the Risk‐Takers group. A profile approach to measurement has methodological advantages, can add to substantive knowledge, and can inform content, timing, and targets of sexual health interventions.     

Test of the demands,supports-constraints framework in predicting psychological distress amongst Australian public sector employees

This paper describes the demands, supports-constraints framework originally articulated by Payne (1979) for predicting psychological distress, and reports the results of an empirical study involving 2452 white-collar, public sector employees in Australia. The study uses hierarchical regression to test for the interaction effects of the demands and constraints variables, having applied suitable controls for instance by including trait anxiety and removing curvilinear effects. The results reveal little evidence of an interactive effect but moderately strong main effects and modest support for the value of controlling for curvilinear effects. Trait anxiety is shown to have a strong effect on psychological distress and considerably reduces the size of the relationship between demands, supports-constraints and psychological distress when statistically controlled for. However, it still accounts for 18.7% of the variance when entered last in the regression and it is recommended that its effects be explored in all studies of stress that rely on self-report data.     

Voting is Social Work: Voices From the National Social Work Voter Mobilization Campaign

ABSTRACT

The National Social Work Voter Mobilization Campaign, also known as Voting is Social Work, involved social work faculty, field educators, practitioners, and students in a nonpartisan voter engagement drive. Following the 2018 elections, researchers surveyed Campaign participants in social work schools and agencies to document their voter engagement activities.The study reported extent and amount of their involvement. The survey distinguished between the voter engagement participation of school- versus agency-based social workers, which has not been studied elsewhere. Participants also reported the benefits of political participation to individuals, communities, and the profession and perceived barriers such as organizational constraints, fears of appearing partisan, and distrust of politics. Presented in historical context, the findings highlight the need to mainstream voter engagement throughout social work education.     

Internal Working Models of Attachment and Postdivorce Coparent Relationships

Stable coparenting relationships postdivorce have been shown to combat the negative effects on child development. There are three types of coparental relationships postdivorce: stable, conflicted and cut off. Each type of interaction has different effects on the children and other family members, with the stable coparent relationship being the most functional. Attachment theory explains the differences between the coparenting styles. Individuals in stable coparent relationships are more likely to have a secure internal working model; conflicted coparents are more likely to have an anxious-ambivalent internal working model; and disengaged coparents are more likely to have an avoidant internal working model.     

Young Adults' Attitudes Toward Polygamous Marriage as a Function of Gender,Attitudes Toward Same-Sex Marriage,and Other Sociopersonality Constructs

U.S. citizens are overwhelmingly opposed to the legalization of polygamous marriage, but specific reasons for this opposition remain unclear. In this study we examined young adults' (n = 814) attitudes toward polygamous marriage as a function of myriad variables. Particular attention was given to the presumed association between attitudes toward same-sex marriage and polygamous marriage. Results indicated that, overall, young adults' attitudes toward polygamous marriage were neutral. Also, attitudes toward same-sex marriage significantly correlated with attitudes toward polygamous marriage. However, not all pro–same-sex marriage participants were pro-polygamous marriage. Moreover, opposition to same-sex marriage, (female) gender, higher levels of authoritarianism, and endorsement of traditional family values conjointly and individually predicted opposition to polygamous marriage. Implications of the findings are discussed, particularly in the context of U.S. discourse over the legalization of same-sex marriage.