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Methods Young healthy heterosexual couples underwent sleep-lab-based polysomnography of two sleeping arrangements: individual sleep and co-sleep. Individual and dyadic sleep parameters (i.e., synchronization of sleep stages) were collected. The latter were assessed using cross-recurrence quantification analysis. Additionally, subjective sleep quality, relationship characteristics, and chronotype were monitored. Data were analyzed comparing co-sleep vs. individual sleep. Interaction effects of the sleeping arrangement with gender, chronotype, or relationship characteristics were moreover tested. Results As compared to sleeping individually, co-sleeping was associated with about 10% (...) more REM sleep, less fragmented REM sleep (p = 0.008), longer undisturbed REM fragments (p = 0.0006), and more limb movements (p = 0.007). None of the other sleep stages was significantly altered. Social support interacted with sleeping arrangement in a way that individuals with suboptimal social support showed the biggest impact of the sleeping arrangement on REM sleep. Sleep architectures were more synchronized between partners during co-sleep (p = 0.005) even if wake phases were excluded (p = 0.022). Moreover, sleep architectures are significantly coupled across a lag of ± 5min. Depth of relationship represented an additional significant main effect regarding synchronization, reflecting a positive association between the two. Neither REM sleep nor synchronization was influenced by gender, chronotype, or other relationship characteristics. Conclusion Depending on the sleeping arrangement, couple's sleep architecture and synchronization show alterations that are modified by relationship characteristics. We discuss that these alterations could be part of a self-enhancing feedback loop of REM sleep and sociality and a mechanism through which sociality prevents mental illness. (shrink)

While the ethical use of deception has been discussed in literature, the ethics and acceptability of nursing deception has yet to be studied. The current study examined nurses’ and nursing students’ ratings of the ethics and acceptability of nursing deception. We predicted that nurses and nursing students would rate a truthful vignette as more ethical than a deceptive vignette. We also predicted that participants would rate nursing deception as unethical and unacceptable. A mixed design was used to examine ethics scores (...) as a within-subjects factor and order as a between-groups design factor. A total of 131 nurses and nursing students were recruited from university nursing programs and hospitals in Texas. Participants were provided with a truthful vignette and deceptive vignette and used the Multidimensional Ethics Scale-Revised 1 to rate each vignette. Participants also completed the Lies in Nursing Ethics Questionnaire. The truthful nursing vignette was rated as more ethical than the deceptive vignette. Results indicated that most participants rated nursing deception as unethical, unacceptable, and a violation of the ANA ethical code. Some participants deemed that nursing deception may be acceptable within some cases. Age and years of experience were not related to the perceived ethics and acceptability of nursing deception. Nurses and nursing students believe that using deception with patients is unethical and unacceptable. However, some participants believed that deception may be warranted within some cases. These findings may reflect nurses’ placing the patient at the core of their values and viewing honesty as important for the nurse-patient relationship. Further implications and directions are discussed. (shrink)

Males are selectively afflicted with the neurodevelopmental and psychiatric disorders of childhood, a broad and virtually ubiquitous phenomenon that has not received proper attention in the biological study of sex differences. The previous literature has alluded to psychosocial differences, genetic factors and elements pertaining to male “complexity” and relative immaturity, but these are not deemed an adequate explanation for selective male affliction. The structure of sex differences in neurodevelopmental disorders is hypothesized to contain these elements: Males are more frequently afflicted, (...) females more severely; disorders arising in females are largely mediated by the genotype; in males, by a genotype by environment interaction; complications of pregnancy and delivery occur more frequently with male births; such complications are decisive and influence subsequent development. We hypothesize that there is something about the male fetus that evokes an inhospitable uterine environment. This “evocative principle” is hypothesized to relate to the relative antigenicity of the male fetus, which may induce a state of maternal immunoreactivity, leading either directly or indirectly to fetal damage. The immunoreactive theory thus constructed is borrowed from studies of sex ratios and is the only explanation consistent with negative parity effects in the occurrence of pregnancy complications and certain neurodevelopmental disorders. Although the theory is necessarily speculative, it is heuristic and hypotheses derived from it are proposed; some are confirmed in the existing literature and by the authors' research. (shrink)

The experiment, the design, and the analysis; Review of statistical inference; Single-factor experiments with no restrictions on randomization; Single-factor experiments - randomized block design; Single-factor experiments - latin and other squares; Factorial experiments; 2n factorial experiments; Qualitative and quantitative factors; 3n factorial experiments; Fixed, random and mixed models; Nested and nested-factorial experiments; Experiments of two or more factors - restrictions on 4randomization; Factorial experiments - split-plot design; Factorial experiment - confounding in blocks; Franctional replication; Miscellaneous topics.