Simultaneous Alcohol and Cannabis Use and High-Risk Sexual Behaviors.

Background: Alcohol and cannabis use rates are highest in college-aged young adults, and both alcohol and cannabis use are independently related to high-risk sexual behaviors (HRSBs). HRSBs (e.g., sex without protection against sexually transmitted infections) are a prevalent public health problem in college students, with little research examining simultaneous alcohol and cannabis use (i.e., using both alcohol and cannabis at the same time so the effects overlap) and HRSBs. Method: We examined simultaneous alcohol and cannabis-related HRSB frequency, gender differences in simultaneous alcohol and cannabis-related HRSBs, and differences in HRSBs between simultaneous and non-simultaneous users. Alcohol and cannabis using college students (N = 534; Average Age = 19; 66.9% reported identifying as female) were recruited through a psychology department's human subjects research pool and completed a one-time, online, self-report survey. Results: One-third of participants engaged in simultaneous alcohol and cannabis use prior to sexual intercourse in the past 3 months. Additionally, over one-third of participants reported heavy drinking (4/5 or more drinks for women/men) simultaneously with cannabis use prior to sexual intercourse in the past 3 months. Simultaneous alcohol and cannabis use was significantly and positively related to sexual intercourse after simultaneous use and after heavy drinking simultaneously with cannabis use. Past year simultaneous alcohol and cannabis users, relative to non-simultaneous users, reported increased incidents of sex without protection against sexually transmitted infections. No gender differences in simultaneous alcohol and cannabis-related HRSBs were found. Conclusions: Future research should continue examining simultaneous alcohol and cannabis use and HRSBs.

A robophysical model of spacetime dynamics.

Systems consisting of spheres rolling on elastic membranes have been used to introduce a core conceptual idea of General Relativity: how curvature guides the movement of matter. However, such schemes cannot accurately represent relativistic dynamics in the laboratory because of the dominance of dissipation and external gravitational fields. Here we demonstrate that an "active" object (a wheeled robot), which moves in a straight line on level ground and can alter its speed depending on the curvature of the deformable terrain it moves on, can exactly capture dynamics in curved relativistic spacetimes. Via the systematic study of the robot's dynamics in the radial and orbital directions, we develop a mapping of the emergent trajectories of a wheeled vehicle on a spandex membrane to the motion in a curved spacetime. Our mapping demonstrates how the driven robot's dynamics mix space and time in a metric, and shows how active particles do not necessarily follow geodesics in the real space but instead follow geodesics in a fiducial spacetime. The mapping further reveals how parameters such as the membrane elasticity and instantaneous speed allow the programming of a desired spacetime, such as the Schwarzschild metric near a non-rotating blackhole. Our mapping and framework facilitate creation of a robophysical analog to a general relativistic system in the laboratory at low cost that can provide insights into active matter in deformable environments and robot exploration in complex landscapes.

Reproductive Coercion and Intimate Partner Violence Perpetration Among Young Adult Males.

Reproductive coercion is any behavior that attempts to control the autonomous reproductive decision-making of an intimate partner. Very little research has focused on males who perpetrate reproductive coercion. Using a diverse community sample of young adults, we examined the prevalence of lifetime reproductive coercion perpetration and its relationship with other forms of intimate partner violence (IPV). Results demonstrated that approximately 6.4% of the men reported perpetrating reproductive coercion in their lifetime. Chi-square analyses demonstrated that men who reported sexual (16.2%), physical (11.1%), or psychological (59.1%) IPV perpetration, relative to men who did not, reported a significantly higher prevalence of reproductive coercion perpetration.

Reproductive Coercion Victimization and Associated Mental Health Outcomes Among Female-Identifying Young Adults.

Reproductive coercion is a serious public health problem. Victimization has been associated with poor mental health outcomes, including symptoms of posttraumatic stress disorder (PTSD) and depression in clinical and college samples. We build on these findings by examining the association between reproductive coercion victimization and mental and behavioral health outcomes, including depression, PTSD symptoms, anxiety, and drinking behaviors in a diverse community-derived sample of female-identifying young adults (mean age = 20; SD=.72). Participants (n = 368) were originally recruited as part of a study on dating violence in seven Texas public high schools. Participants completed an online study that included demographic questions and measures that assessed the variables of interest. Results of regression analyses showed that reproductive coercion victimization predicted depression, anxiety, and PTSD symptoms, after controlling for race, sexual orientation, and age. The findings also revealed that victims of reproductive coercion were more likely consume more drinks per drinking occasion compared to their non-victimized counterparts. These results add to the growing literature that experiencing reproductive coercion is a risk marker for poor mental and behavioral health. To develop targeted prevention and intervention programs, future research should examine potential mechanisms underlying this relationship.

Reproductive Coercion and Intimate Partner Violence Victimization Among a Racially and Ethnically Diverse Young Adult Sample.

Reproductive coercion is an understudied form of intimate partner violence (IPV) that occurs when a person attempts to control the autonomous reproductive decision making of their intimate partner. Previous research has demonstrated that individuals who experience reproductive coercion are more likely to experience other forms of IPV (e.g., physical and sexual). Research has also shown that Black/African American and Latinx/Hispanic individuals are at an increased risk of experiencing reproductive coercion compared to their White/Non-Hispanic peers. However, most of the research on reproductive coercion has been conducted in family-planning clinics where IPV is reported at a higher rate than in community samples. Thus, using a diverse community sample of female-identifying young adults (N = 370) who were recruited as part of an ongoing longitudinal study on dating violence, we examined the prevalence of lifetime reproductive coercion and its relationship with other forms of IPV, as well as the differences in prevalence among racial and ethnic groups. Lifetime prevalence of being victimized by any form of reproductive coercion was 11.4%. Results indicated that individuals who experienced reproductive coercion were more likely to experience physical and sexual IPV relative to those who did not experience reproductive coercion. With respect to race/ethnicity, 5.6% of White participants, 10.5% of Black/African American participants, and 14.8% of Hispanic/Latinx participants reported experiencing reproductive coercion. Chi-square analyses showed Hispanic/Latinx participants had a significantly higher prevalence of reproductive coercion when compared to White/Non-Hispanic participants. These findings suggest a need for additional research on culturally-specific risk and protective factors related to reproductive coercion among Hispanic/Latinx individuals to identify potential intervention and prevention strategies.

Age, criterion flexibility, and item recognition.

We examined young and older adults' ability to flexibly adapt response criterion on a recognition test when the probability that a test item had been studied was cued by test color. One word color signaled that the probability of the test item being old was 70% and a second color signaled that the probability of the test item being new was 70%. Young and older adults demonstrated similar levels of criterion shifting in response to color cues. Moreover, although both young and older adults were slowed when test-item color incorrectly predicted test-item status, the extent of slowing did not differ across age group. Putative measures of cognitive control predicted recognition accuracy but not the degree to which criterion changed with test-item color. These results suggest that adaptive criterion shifting does not tax cognitive control or, if it does require effort, may be no more onerous for older than for young adults.