The information for the direction of dependence in l1 regression

Fitting a linear regression for a response variable by minimising the sum of absolute deviations, L₁ regression, may be viewed as a maximum likelihood procedure applied to the Laplace distribution. An interesting bivariate case is where the conditional distribution of the response X₂ given X₁ and the marginal distribution of the explanatory variable X₁ are both Laplace. In this context we show there is information to distinguish the direction of dependence between X₁ and X₂ from observations. That is we may distinguish the model in which X₁ is dependent on X₂ from that in which X₂ is dependent on X₁ This is not true for L₂ regression based on the Normal distribution.     

Fathers’ Perspectives on Strengthening Military Families: A Mixed Method Evaluation of a 10-Week Resiliency Building Program

A recent Institute of Medicine report on “The Assessment or Readjustment Needs of Veterans, Service Members, and Their Families” http://nationalacademies.org/hmd/Reports/2013/Returning-Home-from-Iraq-and-Afghanistan.aspx, (2013) underscored the need for effective support for military families with young children, and that effective engagement into existing services remains a challenge. This mixed-method study involved 14 fathers (previously deployed military) who engaged in the Strong Military Families Program, a resiliency-building group for families with young children. The purpose of this paper was twofold: first, to identify the efficacy of this brief intervention for reducing mental health symptomatology among previously deployed military fathers who completed the group, and second to better understand the perceptions and reflections of fathers who completed an effective symptom management program in order to fill the literature gap around this issue and guide future efforts at increasing engagement of this population. Pre- and post-group assessments were administered including depression and posttraumatic stress symptom ratings. Assessments also included interviews designed to elicit fathers’ expectations before the program and to capture their reflections after completion. Quantitative analyses examined changes in symptoms pre- to post-group, and qualitative analyses aimed to better understand fathers’ experiences and help guide future efforts to increase engagement of this population. A grounded theory approach was employed to analyze interview content, and two themes were identified reflecting a desire for (1) connection and (2) learning. The prominence of these themes both before and after group underscored the value of connection to others who shared experience and opportunity for learning effective parenting strategies. Corresponding quantitative analyses indicated a significant decrease in self-reported posttraumatic stress (p?<?.05) and trend level reduction in depression (p?<?.10), suggesting participation may contribute to more effective symptom management. Subgroup analyses contrasting the pre-group interviews of fathers who endorsed higher (n?=?9) versus lower (n?=?5) levels of symptoms revealed that those with greater symptomatology expressed more themes related to fear of committing to the program. Discussion will focus on effective outreach and engagement, and the need to align programs to the interests of previously deployed fathers of young children.     

Why does zeno the stoic hold his breath? "Zenoism" as a new variable for studying suicide

A single misfortune may be seen as just that, or may be interpreted as Zeno the Stoic did, as a "sign" of cosmic proportion (zenoizing), which paradoxically provides a missing meaning structure. This article presents two studies testing out this new variable (zenoism): in Study One (n = 233), we explore the moderating effects of religiosity and gender on zenoism, depression, demoralization, and suicidality. In Study Two (n = 137), we explore these same moderating effects on zenoism, fear of dependency, value of life, and favorability toward physician-assisted suicide (PAS). Results indicate: 1) men and non-religious respondents (especially men) zenoize more than women and religious respondents; 2) non-religious respondents, (especially men) are more generally favorable to PAS and more suicidal; 3) Zenoism is negatively related to depression, demoralization, and value of life for non-religious respondents, and for men; 4) Zenoism is positively related to favorability toward PAS toward one's self and overall suicidality; and finally 5) general and self-specific favorability toward PAS are distinct, but both relate to overall suicidality.     

Pedagogical Dramas and Transformational Play: Narratively Rich Games for Learning

Although every era is met with the introduction of powerful technologies for entertainment and learning, videogames represent a new contribution binding the two and bearing the potential to create sustained engagement in a curricular drama where the player's knowledgeable actions shape an unfolding fiction within a designed world. Although traditionally, stories involve an author, a performer, and an audience, much of the power of videogames as media for advancing narrative springs from their affordance for the player to occupy more than one role—and sometimes all three—simultaneously. In the narratively rich videogames that we design, players have the opportunity to perform actions, experience consequences, and reflect on the underlying social values that these situations were designed to engage, affording a type of narrative transactivity. Elsewhere we have discussed designing these media as contexts for engaging academic content; here we illuminate the power of videogames to engage children in ideological struggles as they are experienced in game-based adaptations of classic literature. Toward this end, we present our theoretical argument for the power of games as a contemporary story medium, grounding this discussion in the context of two game design projects and their implementations. Implications are discussed in terms of the potential of immersive, interactive media—videogame technology, in short—for achieving wide-ranging educational ends.     

Exploring the physical, mental and social well-being of gay and bisexual men who cruise for sex on a college campus

A mixed methods design was used to collect data from 30 men who were currently, or had a history of, participating in anonymous public sex in college campus venues. Data were analyzed to assess the extent to which participation in these behaviors was associated with both positive and negative outcomes across the areas of physical health, mental health and social well-being. Findings indicated that cruising for sex on a college campus simultaneously presents challenges to, and supports, the health of gay and bisexual men. Recommendations for interfacing with these men by campus and community health providers are given.     

Direction dependence in a regression line

In this paper, we derive some simple formulae to express the association between two random variables in the case of a linear relationship, One of these representations, the cube of the correlation coefficient, is given as the ratio of the skewness of the response variable to that of the explanatory variable. This result, along with other expressions of the correlation coefficient presented in this paper, has implications for choosing the response variable in a linear regression modelling.