introduction : osteoporosis is characterized by low bone density and increase in the risk of fracture. because in pregnancy and lactation there are many factors which influence bone mineral density, we sought to assess whether the accumulation of multiple pregnancies and the accompanying extended periods of lactation were a risky factor for low bone mineral density and osteoporosis. materials &...

In this paper, I examine the effect of introducing heterogeneity between players in models of strategic experimentation. I consider a two-armed bandit problem with one safe arm and a risky arm. There are two players and each has an access to such a bandit. A player using the safe arm experiences a safe flow payoff . The risky arm can either be good or bad. A bad risky arm is worse than the safe...

This study investigated the hypothesis that adults are faster than adolescents in responding to risks. Twenty-six adolescents (M(age) = 15 years) and 26 adults (M(age) = 47 years) responded to risky situations (e.g. 'Is it a good idea to drive a car while having drunk alcohol?') and non-risky situations (e.g. '… wear a helmet while riding a moped?') in a choice reaction time task. Adults respon...

Despite the number of tools created to help end-users reduce risky security behaviours, users are still falling victim to online attacks. This paper proposes a browser extension utilising affective feedback to provide warnings on detection of risky behaviour. The paper provides an overview of behaviour considered to be risky, explaining potential threats users may face online. Existing tools de...

HIV is most prevalent among men who have sex with men (MSM), and although most MSM use condoms consistently during casual sex, some take risks. To better understand the psychology of those risky decisions, we examined neural correlates of playing a virtual sexual 'hook up' game in an functional magnetic resonance imaging scanner in MSM who had, in the past 90 days, been sexually risky (N = 76) ...

The mediating effects of risky behaviours on the linkage between childhood attention deficit hyperactive disorder (ADHD) symptoms and adolescent sexual victimisation in college women were examined using structural equation modelling (n 374). The moderating effects of timing onset of risky behaviours were also examined. General risky behaviour was not a significant mediator. Rather, findings sup...

In this study, we investigated the effect of transcranial alternating current stimulation (tACS) on voluntary risky decision making and executive control in humans. Stimulation was delivered online at 5 Hz (θ), 10 Hz (α), 20 Hz (β), and 40 Hz (γ) on the left and right frontal area while participants performed a modified risky decision-making task. This task allowed participants to voluntarily s...

background: intravenous drug users (ivdus) who share needles/syringes and practice sexual behaviors, are the most important group in the transmission of blood-borne infection diseases such as hepatitis c virus (hcv). therefore identification of prevalent high-risky behaviors among ivdus to detect the most route of transmission among them is essential to develop harm reduction programs among ivd...

conclusions our findings suggest the importance of high-risk behaviors in terms of etiological pathways, maintenance process and treatment interventions. results the results suggested that the model had good fit (root mean square of approximation = 0.07, comparative fit index = 0.95, normed fit index = 0.91, goodness of fit index =0.93) with the data. accordingly, the indirect effect of resilie...