Relationship Norm Strength: Measurement Structure, Dyadic Interdependence, Correlates, Causes and Consequences

The study of norms and close relationships are two pillars of social psychological scholarship, yet the two topics are rarely studied in tandem. When relationship norms have been the subject of empirical study, researchers have focused on evaluating the importance of their content for relational processes. In the present dissertation, I propose the strength of relationship norms as a topic worthy of empirical attention. Across five studies, including correlational, quasi-experimental, experimental, and dyadic designs, I evaluated the primary hypothesis that relationship norms would be stronger in relationships characterized by greater affiliative motivation, opertationalized both in terms of organically occurring relationship types, and ratings of relationship quality. Throughout the five studies, I also tested secondary hypotheses related to the association between relationship norm strength and perceived similarity, asset and resource sharing, and conflict between relationship partners, as well as the extent to which members of romantic couples abided by the norms of their relationship. In Study 1, participants (n = 100) perceived relationship types implying greater commitment (e.g., committed romantic relationships) as having stronger norms than those implying lesser commitment (e.g., casual sex relationships). In Study 2, I piloted a multidimensional measure of relationship norm strength and documented similar differences in norm strength and relationship quality among participants (n = 312) who were currently in the relationship types examined in Study 1. In Study 3, some aspects of relationship norm strength and relationship quality were positively associated for members of romantic dyads (ncouples = 25, nindividuals = 11). Individuals in a relationship with stronger norms generally reported complying with their relationship’s norms to a greater extent, though the opposite was sometimes true of their partner; individuals also exhibited a large amount of bias in appraising their partner’s level of norm compliance. In Study 4, participants currently in a romantic relationship (n = 286) primed to recall memories of high relationship quality reported feeling stronger norms in their romantic relationship, relative to those primed to recall moments of low relationship quality. Finally, in Study 5, participants currently in a romantic relationship (n = 239) primed to perceive their relationship norms as strong perceived their relationship as being higher quality than those in a control condition. These five studies provide initial promising support for the hypothesized role of relationship norm strength. I discuss their implications and the importance of continued investigations of relationship norm strength

Harmful and Helpful Therapy Practices with Consensually Non-Monogamous Clients: Toward an Inclusive Framework

Drawing on minority stress perspectives, we investigated the therapy experiences of individuals in consensually nonmonogamous (CNM) relationships. Method: We recruited a community sample of 249 individuals engaged in CNM relationships across the U.S. and Canada. Confirmatory factor analysis structural equation modeling was used to analyze client perceptions of therapist practices in a number of exemplary practices (affirming of CNM) or inappropriate practices (biased, inadequate, or not affirming of CNM), and their associations with evaluations of therapy. Open-end responses about what clients found very helpful and very unhelpful were also analyzed. Results: Exemplary and inappropriate practices constituted separate but related patterns of therapist conduct. As expected, perceptions of exemplary and inappropriate practices predicted therapist helpfulness ratings and whether participants prematurely terminated their therapeutic relationships. Qualitative results point toward the importance of having/pursuing knowledge about CNM and using affirming, nonjudgmental practices. Conclusions: Therapists are positioned to either combat or perpetuate the minority stress faced by individuals engaged in CNM. The results of this study highlight the need for additional research, training, and guidelines regarding CNM clients and their therapy experiences

Macronutrient intake and simulated infection threat independently affect life history traits of male decorated crickets.

Nutritional geometry has advanced our understanding of how macronutrients (e.g., proteins and carbohydrates) influence the expression of life history traits and their corresponding trade-offs. For example, recent work has revealed that reproduction and immune function in male decorated crickets are optimized at very different protein:carbohydrate (P:C) dietary ratios. However, it is unclear how an individual's macronutrient intake interacts with its perceived infection status to determine investment in reproduction or other key life history traits. Here, we employed a fully factorial design in which calling effort and immune function were quantified for male crickets fed either diets previously demonstrated to maximize calling effort (P:C = 1:8) or immune function (P:C = 5:1), and then administered a treatment from a spectrum of increasing infection cue intensity using heat-killed bacteria. Both diet and a simulated infection threat independently influenced the survival, immunity, and reproductive effort of males. If they called, males increased calling effort at the low infection cue dose, consistent with the terminal investment hypothesis, but interpretation of responses at the higher threat levels was hampered by the differential mortality of males across infection cue and diet treatments. A high protein, low carbohydrate diet severely reduced the health, survival, and overall fitness of male crickets. There was, however, no evidence of an interaction between diet and infection cue dose on calling effort, suggesting that the threshold for terminal investment was not contingent on diet as investigated here

Genetic covariance in immune measures and pathogen resistance in decorated crickets is sex and pathogen specific

Insects are important models for studying immunity in an ecological and evolutionary context. Yet, most empirical work on the insect immune system has come from phenotypic studies meaning we have a limited understanding of the genetic architecture of immune function in the sexes. We use nine highly inbred lines to thoroughly examine the genetic relationships between a suite of commonly used immune assays (haemocyte count, implant encapsulation, total phenoloxidase activity, antibacterial zone of inhibition and pathogen clearance) and resistance to infection by three generalist insect pathogens (the gram-negative bacterium Serratia marcescens, the gram-positive bacterium Bacillus cereus and the fungus Metarhizium robertsii) in male and female Gryllodes sigillatus. There were consistent positive genetic correlations between haemocyte count, antibacterial and phenoloxidase activity and resistance to S. marcescens in both sexes, but these relationships were less consistent for resistance to B. cereus and M. robertsii. In addition, the clearance of S. marcescens was genetically correlated with the resistance to all three pathogens in both sexes. Genetic correlations between resistances to the different pathogen species were inconsistent, indicating that resistance to one pathogen does not necessarily mean resistance to another. Finally, while there is ample genetic (co)variance in immune assays and pathogen resistance, these genetic estimates differed across the sexes and many of these measures were not genetically correlated across the sexes, suggesting that these measures could evolve independently in the sexes. Our finding that the genetic architecture of immune function is sex and pathogen specific suggests that the evolution of immune function in male and female G. sigillatus is likely to be complex. Similar quantitative genetic studies that measure a large number of assays and resistance to multiple pathogens in both sexes are needed to ascertain if this complexity extends to other species

Evolution of immune function in response to dietary macronutrients in male and female decorated crickets

Although dietary macronutrients are known to regulate insect immunity, few studies have examined their evolutionary effects. Here, we evaluate this relationship in the cricket Gryllodes sigillatus by maintaining replicate populations on four diets differing in protein (P) to carbohydrate (C) ratio (P- or C-biased) and nutritional content (low- or high-nutrition) for >37 generations. We split each population into two; one maintained on their evolution diet and the other switched to their ancestral diet. We also maintained populations exclusively on the ancestral diet (baseline). After three generations, we measured three immune parameters in males and females from each population. Immunity was higher on P-biased than C-biased diets and on low- versus high-nutrition diets, although the latter was most likely driven by compensatory feeding. These patterns persisted in populations switched to their ancestral diet, indicating genetic divergence. Crickets evolving on C-biased diets had lower immunity than the baseline, whereas their P-biased counterparts had similar or higher immunity than the baseline, indicating that populations evolved with dietary manipulation. Although females exhibited superior immunity for all assays, the sexes showed similar immune changes across diets. Our work highlights the important role that macronutrient intake plays in the evolution of immunity in the sexes

Active and covert infections of cricket Iridovirus and Acheta domesticus Densovirus in reared Gryllodes sigillatus crickets

Interest in developing food, feed, and other useful products from farmed insects has gained remarkable momentum in the past decade. Crickets are an especially popular group of farmed insects due to their nutritional quality, ease of rearing, and utility. However, production of crickets as an emerging commodity has been severely impacted by entomopathogenic infections, about which we know little. Here, we identified and characterized an unknown entomopathogen causing mass mortality in a lab-reared population of Gryllodes sigillatus crickets, a species used as an alternative to the popular Acheta domesticus due to its claimed tolerance to prevalent entomopathogenic viruses. Microdissection of sick and healthy crickets coupled with metagenomics-based identification and real-time qPCR viral quantification indicated high levels of cricket iridovirus (CrIV) in a symptomatic population, and evidence of covert CrIV infections in a healthy population. Our study also identified covert infections of Acheta domesticus densovirus (AdDNV) in both populations of G. sigillatus. These results add to the foundational research needed to better understand the pathology of mass-reared insects and ultimately develop the prevention, mitigation, and intervention strategies needed for economical production of insects as a commodity

Promoting Replicable Sexual Science: A Methodological Review and Call for Metascience

Concerns have increased within the medical and social science communities about the replicability of scientific findings, and subsequently, assessments of replicability and proposals for how it may be increased have become more common. Sexual scientists, however, with few exceptions, have yet to formally participate in the published discourses about replicability. In this commentary, I begin by highlighting how replicability is important for science in general, and then arguing that sexual science could be uniquely and negatively impacted without more direct involvement in the replicability movement from those within our field. I then briefly review several mechanisms through which replicability can be undermined in research, and some of the proposals for addressing these issues. I conclude by offering some ideas for how sexual scientists might begin to evaluate and improve the replicability of our field, and stress the need for sexual scientists to add their voices to the ongoing discussions about the problem of replicability of scientific findings

Problems with Recall-Based Attachment Style Priming Paradigms: Exclusion Criteria, Sample Bias and Reduced Power

Attachment styles are often primed by having participants recall and describe a relationship that is prototypical of a given attachment style. Researchers may exclude participants who cannot recall such a relationship, or who describe relationships that do not conform to the assigned prime. I suggest that excluding participants is untenable, and may threaten a study’s validity. In the present research, I examine predictors of exclusion from an attachment priming study. Priming insecure attachment resulted in greater odds of exclusion relative to a control condition. Female participants with greater sexual experience also had lesser odds of exclusion. These results suggest that attachment-priming procedures contribute to participant exclusion that compromise internal and external validity. Discussion focuses on directions for future attachment-priming research