Emotional regulation, attachment to possessions and hoarding symptoms

This study aimed to test which particular facets of emotion regulation (ER) are most linked to symptoms of hoarding disorder, and whether beliefs about emotional attachment to possessions (EA) mediate this relationship. A non-clinical sample of 150 participants (108 females) completed questionnaires of emotional tolerance (distress tolerance, anxiety sensitivity, negative urgency - impulsivity when experiencing negative emotions), depressed mood, hoarding, and beliefs about emotional attachment to possessions. While all emotional tolerance measures related to hoarding, when considered together and controlling for depression and age, anxiety sensitivity and urgency were the significant predictors. Anxiety sensitivity was fully mediated, and urgency partially mediated, via beliefs regarding emotional attachment to possessions. These findings provide further support for (1) the importance of anxiety sensitivity and negative urgency for hoarding symptoms, and (2) the view that individuals with HD symptoms may rely on items for emotion regulation, leading to stronger beliefs that items are integral to emotional wellbeing.

An integration of attachment theory and reinforcement sensitivity theory as a conceptual framework for understanding trauma

 The research examined the associations between Reinforcement Sensitivity Theory, Attachment Theory, and trauma symptoms among victims of interpersonal violence. Findings demonstrated a link between attachment, threat sensitivity, and trauma symptoms, indicating that RST and Attachment Theory provides a useful theoretical framework to understand how interpersonal violence contributes to psychological trauma.

Self-organised nanoarchitecture of titanium surfaces influences the attachment of Staphylococcus aureus and Pseudomonas aeruginosa bacteria

The surface nanotopography and architecture of medical implant devices are important factors that can control the extent of bacterial attachment. The ability to prevent bacterial attachment substantially reduces the possibility of a patient receiving an implant contracting an implant-borne infection. We now demonstrated that two bacterial strains, Staphylococcus aureus and Pseudomonas aeruginosa, exhibited different attachment affinities towards two types of molecularly smooth titanium surfaces each possessing a different nanoarchitecture. It was found that the attachment of S. aureus cells was not restricted on surfaces that had an average roughness (S a) less than 0.5 nm. In contrast, P. aeruginosa cells were found to be unable to colonise surfaces possessing an average roughness below 1 nm, unless sharp nanoprotrusions of approximately 20 nm in size and spaced 35.0 nm apart were present. It is postulated that the enhanced attachment of P. aeruginosa onto the surfaces possessing these nanoprotrusions was facilitated by the ability of the cell membrane to stretch over the tips of the nanoprotrusions as confirmed through computer simulation, together with a concomitant increase in the level of extracellular polymeric substance (EPS) being produced by the bacterial cells.

Attachment, developmental tasks and coping in the transition to university

 Students commencing university were surveyed three times to identify what individual variables facilitated positive adjustment experiences. Student’s attachment orientations were found to be strongly associated with their university adjustment, and this was mediated by students’ use of different coping strategies and their negotiation of the developmental tasks of young adulthood.

The influence of maternal mental health, attachment and hormonal factors on a mother’s attachment to her fetus during pregnancy

 The thesis investigated the role of maternal mental health, maternal attachment and hormones in the development of maternal-fetal attachment during pregnancy. The study found that oxytocin and cortisol were associated with maternal-fetal attachment throughout pregnancy. The study also found that maternal mental health, particularly anxiety, stress and depression during the prenatal period impacted on the development of maternal-fetal attachment across pregnancy. The findings have clinical and research implications with regard to early intervention for attachment and maternal well-being.

Bacterial attachment on sub-nanometrically smooth titanium substrata

Despite the volume of work that has been conducted on the topic, the role of surface topography in mediating bacterial cell adhesion is not well understood. The primary reason for this lack of understanding is the relatively limited extent of topographical characterisation employed in many studies. In the present study, the topographies of three sub-nanometrically smooth titanium (Ti) surfaces were comprehensively characterised, using nine individual parameters that together describe the height, shape and distribution of their surface features. This topographical analysis was then correlated with the adhesion behaviour of the pathogenic bacteria Staphylococcus aureus and Pseudomonas aeruginosa, in an effort to understand the role played by each aspect of surface architecture in influencing bacterial attachment. While P. aeruginosa was largely unable to adhere to any of the three sub-nanometrically smooth Ti surfaces, the extent of S. aureus cell attachment was found to be greater on surfaces with higher average, RMS and maximum roughness and higher surface areas. The cells also attached in greater numbers to surfaces that had shorter autocorrelation lengths and skewness values that approached zero, indicating a preference for less ordered surfaces with peak heights and valley depths evenly distributed around the mean plane. Across the sub-nanometrically smooth range of surfaces tested, it was shown that S. aureus more easily attached to surfaces with larger features that were evenly distributed between peaks and valleys, with higher levels of randomness. This study demonstrated that the traditionally employed amplitudinal roughness parameters are not the only determinants of bacterial adhesion, and that spatial parameters can also be used to predict the extent of attachment.

Accelerated stem cell attachment to ultrafine grained titanium

Commercial purity titanium with an average grain size in the low sub-micron range was produced by equal channel angular pressing (ECAP). Attachment of human bone marrow-derived mesenchymal stem cells (hMSCs) to the surface of conventional coarse grained and ECAP-modified titanium was studied. It was demonstrated that the attachment and spreading of hMSCs in the initial stages (up to 24h) of culture was enhanced by grain refinement. Surface characterization by a range of techniques showed that the main factor responsible for the observed acceleration of hMSC attachment and spreading on titanium due to grain refinement in the bulk is the attendant changes in surface topography on the nanoscale. These results indicate that, in addition to its superior mechanical properties, ECAP-modified titanium possesses improved biocompatibility, which makes it to a potent candidate for applications in medical implants.

Attachment style and less severe forms of sexual coercion : a systematic review

Few studies have examined how attachment insecurity (i.e., attachment anxiety, attachment avoidance) is associated with the more subtle and less severe forms of sexual coercion, such as verbal threats and partner manipulation. This is despite the fact that past research has indicated some of the relationship behaviors exhibited by insecurely attached individuals represent behaviors indicative of either the perpetration or victimization of less severe forms of sexual coercion. The aim of this study was to conduct a systematic review on the association between attachment style and less severe forms of sexual coercion. Our search, which included published journal papers, book chapters, and theses published between January 1970 and October 2014, yielded 1091 records. Examination of these records against exclusion criteria yielded 11 studies that focused on the associations between attachment orientation and perpetration of sexual coercion (n = 3), sexual coercion victimization (n = 3), or both perpetration and victimization (n = 5). Findings revealed that attachment anxiety appeared to be more consistently associated with being the victim of sexual coercion than attachment avoidance. In terms of perpetration, attachment avoidance was more consistently associated with sexual coercion. These findings were observed when examining the association between attachment dimensions and motives for sexual coercion. The findings also revealed gender to be a moderator for victimization. This review provides insights into how attachment style may influence the perpetration and victimization of sexual coercion.