Dyadic coping and mental health in couples: A systematic review.

Globally, one out of three people suffer from a mental health issue during their lifetime. In romantic relationships, impaired mental health does not only affect the individual but also their partner and therefore needs to be coped with dyadically. In this systematic review, we summarize research examining dyadic coping (DC) in the context of mental health and individual and relational outcomes. We searched for peer-reviewed articles published between January 1990 and April 2023 on PsycInfo, Medline, and PSYNDEX on DC and mental health within romantic relationships. A total of 60 qualitative, quantitative, and intervention studies met the inclusion criteria, reporting on 16,394 individuals and 4,945 dyads. To synthesize the studies, we used a narrative synthesis approach. Overall, stress expression and positive DC yielded beneficial individual and relational outcomes, whereas, for negative DC, the opposite was true. Results differed between mental health clusters and context played an important role (e.g., symptom severity, life phase). Due to the great diversity of studies and variables, further research should focus on understudied mental health clusters (e.g., anxiety disorders). Clinicians are advised to view mental health issues as a dyadic rather than an individual phenomenon ("we-disease") and develop tailored couple-centered interventions.

Dyadic Coping in Couples Facing Chronic Physical Illness: A Systematic Review.

Objective: Chronic physical illness affects not only patients but also their partners. Dyadic coping (DC)-the ways couples cope in dealing with a stressor such as chronic illness-has received increased attention over the last three decades. The aim of the current study was to summarize the state of research on DC in couples with chronic physical illnesses. Methods: We conducted a systematic review of qualitative, quantitative, and mixed-methods studies published between 1990 and 2020, assessing DC in couples affected by severe physical illnesses. We used DC and related search terms for the literature search in Psycinfo, Psyndex, and Medline. Five thousand three hundred thirty studies were identified in three electronic databases and 49 of these were included in the review (5,440 individuals reported on 2,820 dyads). We excluded studies on cancer, cardiovascular disease, and multiple sclerosis because of existing reviews in the respective fields. Half of the studies included were on diabetes. Other studies were on arthritis, chronic obstructive pulmonary disease (COPD), cystic fibrosis, human immunodeficiency virus (HIV), Huntington's disease, lupus erythematosus, Parkinson's disease, renal diseases, stroke, and endometriosis. Two raters extracted data using a predefined protocol, including study quality. Results were collated in a narrative synthesis organized by illness and DC operationalization. Results: Overall, DC was associated with beneficial outcomes in physical health, well-being, and relationship satisfaction. Differential effects became apparent for certain chronic conditions potentially depending on certain disease characteristics, such as early-onset, sudden-onset, or life-threatening conditions. Conclusion: Facing challenges together as a couple seemed indispensable for adapting to a diverse range of demands related to chronic illnesses with some specific demands of particular chronic diseases. There is a need for the development of truly dyadic interventions with an eye on the specific challenges of the various chronic conditions.

An examination of group size and valence in delay discounting of shared outcomes.

Previous research has examined delay discounting in a group context, where the outcomes are shared with others. These studies indicate shallow delay discounting in a group context compared to an individual context. The present set of studies aimed to explore the impact of two factors, group size (the number of others in the group) and group valence (liked or disliked others in the group), that may affect delay discounting in a group context. Results of the two studies replicated previous results, where shallow delay discounting was observed in the group context compared to the individual context. While Study 1 indicated no effects of group size nor of valence, Study 2 indicated shallow delay discounting for a larger group compared to a smaller group and for liked others compared to disliked others. These results contribute the nascent literature on delay discounting in group contexts.

Comparison of the effectiveness of Conners' CPT and the CPT-identical pairs at distinguishing between smokers and nonsmokers with schizophrenia.

Sustained attention deficits and high rates of smoking are often observed in patients with schizophrenia. This has led to the hypothesis that patients may smoke as an attempt to ameliorate cognitive deficits related to abnormal nicotinic structure and function. Continuous performance tasks (CPT) are often used to index sustained attention deficits in patients with schizophrenia, however, there are important differences between tasks that may impact performance in smokers and nonsmokers with schizophrenia differently. The Conners' CPT (C-CPT) has a high signal-to-noise ratio and is commonly used to assess impulsivity. The CPT-Identical Pairs (CPT-IP) has a low signal-to-noise ratio and is commonly used to assess negative symptoms in patients with schizophrenia. We sought to determine whether there were differences of sustained attention between patient smokers vs. nonsmokers, and if one CPT would provide a better separation of sustained attention between groups. Results revealed that both instruments detect more impaired sustained attention deficits in patient smokers compared to nonsmokers. Patient smokers performed significantly worse on the majority of the CPT-IP composite scores compared to the C-CPT composite scores. These results do not support the self-medication theory, as patient smokers performed worse than patient nonsmokers. Researchers studying sustained attention in schizophrenia may wish to consider the CPT-IP over the C-CPT, as well as control for smoking status.

Adding functionalities to precomputed holograms with random mask multiplexing in holographic optical tweezers.

In this study, we present a method designed to generate dynamic holograms in holographic optical tweezers. The approach combines our random mask encoding method with iterative high-efficiency algorithms. This hybrid method can be used to dynamically modify precalculated holograms, giving them new functionalities-temporarily or permanently-with a low computational cost. This allows the easy addition or removal of a single trap or the independent control of groups of traps for manipulating a variety of rigid structures in real time.

Self-compensating amplifier design for cw and Q-switched high-power Nd:YAG lasers.

We experimentally demonstrate a self-adaptive compensation of the pump power dependent thermal lens in an Nd:YAG laser through a thin layer of a medium with a negative temperature dependence of the refractive index. The layer is thermally coupled to the laser rod and leads to a strikingly improved beam quality over a large stability range. The scheme allows for a scaling to high powers as well as pulsed-mode operation.

Generation of radially polarized beams in a Nd:YAG laser with self-adaptive overcompensation of the thermal lens.

Thermal effects such as lensing and birefringence negatively affect the beam quality and limit the power range of solid-state lasers. Self-adaptive overcompensation of the thermal lens is an answer to this problem. It provides a laser system with good beam quality and large stability range. Because the focal length of the thermally induced lens is different for the radial and the tangential polarization, overcompensation can be used to discriminate these two polarizations. Exploiting this method, we demonstrate the generation of radially polarized beams in a self-adaptively overcompensated high-power Nd:YAG laser with an output power of 155 W and an M2 of less than 10.