Optimizing prediction of binge eating episodes : a comparison approach to test alternative conceptualizations of the affect regulation model

Background : Although a wealth of studies have tested the link between negative mood states and likelihood of a subsequent binge eating episode, the assumption that this relationship follows a typical linear dose–response pattern (i.e., that risk of a binge episode increases in proportion to level of negative mood) has not been challenged. The present study demonstrates the applicability of an alternative, non-linear conceptualization of this relationship, in which the strength of association between negative mood and probability of a binge episode increases above a threshold value for the mood variable relative to the slope below this threshold value (threshold dose response model).

Methods : A sample of 93 women aged 18 to 40 completed an online survey at random intervals seven times per day for a period of one week. Participants self-reported their current mood state and whether they had recently engaged in an eating episode symptomatic of a binge.

Results : As hypothesized, the threshold approach was a better predictor than the linear dose–response modeling of likelihood of a binge episode. The superiority of the threshold approach was found even at low levels of negative mood (3 out of 10, with higher scores reflecting more  negative mood). Additionally, severity of negative mood beyond this threshold value appears to be useful for predicting time to onset of a binge episode.

Conclusions : Present findings suggest that simple dose–response formulations for the association between  negative mood and onset of binge episodes miss vital aspects of this relationship. Most  notably, the impact of mood on binge eating appears to depend on whether a threshold value  of negative mood has been breached, and elevation in mood beyond this point may be useful  for clinicians and researchers to identify time to onset.

Can emotion-focused coping help explain the link between posttraumatic stress disorder severity and triggers for substance use in young adults

High rates of posttraumatic stress disorder (PTSD) have been reported among people seeking treatment for substance use disorders (SUDs), although few studies have examined the relationship between PTSD and substance use in young drug users. This study compared levels of substance use, coping styles, and high-risk triggers for substance use among 66 young adults with SUD, with or without comorbid PTSD. Young people with current SUD–PTSD (n = 36) reported significantly higher levels of substance use in negative situations, as well as emotion-focused coping, compared to the current SUD-only group (n = 30). Severity of PTSD was a significant predictor of negative situational drug use, and emotion-focused coping was found to mediate this relationship. The findings underscore the need for youth substance abuse treatment programs to include coping skills training and management of affect regulation for those individuals with comorbid SUD–PTSD.

Guideline-based programs in the treatment of complex PTSD

The term “post-traumatic stress disorder” (PTSD) is a relatively new diagnostic label, being formally recognized in 1980 in the Diagnostic Statistical Manual for Psychiatric Illness – Third Edition (DSM-III) of the American Psychiatric Association (APA, 1980). Complex Post-Traumatic Stress Disorder (CP) is a more recently discussed, and newly-classified, phenomenon, initially discussed in the early 1990s (Herman, 1992a). Thus, as research into effective treatments for CP is sparse, the treatment of CP is the topic of this study, in which a guideline-based treatment program developed by the researcher for the treatment of CP is implemented and evaluated. Ten individuals participated in this study, undertaking individualized, guideline-based treatment programs spanning a period of six months. In providing background information relevant to this study, an explanation is provided regarding the nature of CP, and the reasons for its consideration as a separate phenomenon to PTSD. The adequacy of the PTSD formulation in enabling effective assessment and treatment of CP is also explored, with endorsement of previous researchers’ conclusions that the CP construct is more useful than the PTSD construct for assessing and treating survivors of long-term and multiple forms of abuse. The PTSD classification is restrictive, and not necessarily appropriate for certain forms of trauma (such as prolonged trauma, or multiple forms of trauma), as such trauma experiences may lead to specific effects that lay outside those formerly associated with PTSD. Such effects include alterations in affect regulation, consciousness, self-perception, interpersonal relationships, and in systems of meaning. Following discussion regarding the PTSD/CP classification, an examination of treatment methods currently used in the treatment of PTSD, and a review of treatment outcome studies, takes place. The adequacy of primary treatment methods in treating CP symptoms is then examined, with the conclusion that a range of treatment methods could potentially be useful in the treatment of CP symptoms. Individuals with a diagnosis of CP may benefit from the adoption of an eclectic approach, drawing on different treatment options for different symptoms, and constantly evaluating client progress and re-evaluating interventions. This review of treatment approaches is followed by details of an initial study undertaken to obtain feedback from individuals who had suffered long-term/multiple trauma and who had received treatment. Participants in this initial study were asked open-ended questions regarding the treatment approach they had experienced, the most useful aspect of the treatment, the least useful aspect, and other strategies/treatment approaches that may have been useful – but which were not used. The feedback obtained from these individuals was used to inform the development of treatment guidelines for use in the main study, as were recommendations made by Chu (1998). The predominant focus of the treatment guidelines was “ego strengthening”, a term coined by Chu (1998) to describe the “initial (sometimes lengthy) period of developing fundamental skills in maintaining supportive relationships, developing self-care strategies, coping with symptomatology, improving functioning, and establishing a positive self identity” (p.75). Using a case study approach, data are then presented relating to each of the ten individuals involved in the treatment program: details of his/her trauma experience(s)and the impact of the trauma (as perceived by each individual); details of each individual’s treatment program (as planned, and as implemented); post-treatment evaluation of the positive and negative aspects of the treatment program (from the therapist’s perspective); and details of the symptoms reported by the individual post-treatment, via psychometric assessment and also during interview. Analysis and discussion of the data relating to the ten participants in the study are the focal point of this study. The evaluation of the effectiveness of each individual’s treatment has been based predominantly on qualitative data, obtained from an analysis of language (discourse analysis) used by participants to describe their symptoms pre- and post-treatment. Both blatant and subtle changes in the language used by participants to describe themselves, their behaviour, and their relationships pre- and post-treatment have provided an insight into the possible changes that occurred as a result of the treatment program. The language used by participants has been a rich source of data, one that has enabled the researcher to obtain information that could not be obtained using psychometric assessment methods. Most of the participants in this study portrayed notable changes in many of the CP symptoms, including being more stable and having improved capacity to explore their early abuse. Although no direct cause-effect relationship between the participants’ treatment program and the improvements described can be established from this study, the participants’ perception that the program assisted them with their symptoms, and reported many aspects of “ego strengthening”, is of major importance. Such self-perception of strength and empowerment is important if an individual is going to be able to deal with past trauma experiences. In fact, abreactive work may have a greater chance of succeeding if those who have experienced long-term or multiple trauma are feeling more empowered, and more stable, as were the participants in this study (post-intervention). In concluding this study, recommendations have been made in regard to the use of guideline-based treatment programs in the responsible treatment of CP. Strengths and limitations of this study have also been highlighted, and recommendations have been made regarding possibilities for future research related to CP treatment. On the whole, this study has supported strongly other research that highlights the importance of focusing on “ego strengthening” in assisting those who have suffered long-term/multiple trauma experiences. Thus, a guideline-based program focusing on assisting sufferers of long-term trauma with some, or all, of the symptoms of CP, is recommended as an important first stage of any treatment of individuals who have experienced long-term/multiple trauma, allowing them to develop the emotional and psychological strength required to deal with past traumatic events. Clinicians who are treating patients whose history depicts long-term or multiple trauma experiences (either from their childhood, or at some stage in their adult life) need, therefore, to be mindful of assessing individuals for symptoms of CP – so that they can treat these symptoms prior to engaging in any work associated directly with the past traumatic experiences.

Applicability of the dual pathway model in normal and overweight binge eaters

Binge eating is a significant problem in both eating disordered and community populations alike. Extensive support exists for the dual pathway model of binge eating in both adolescent and adult clinical and nonclinical populations. However, the restrained eating pathway to binge eating in particular has failed to be confirmed in some studies. In particular, the dual pathway model may not be applicable to overweight binge eaters. The current study examined the applicability of the dual pathway model in a sample of healthy and overweight binge eaters. A total of 260 (115 healthy weight; 145 overweight or obese) adult binge eaters completed an online survey. Mediation analyses indicated support for both the dietary restraint and negative affect pathways in the healthy weight sample but only the latter pathway was supported in the overweight sample. Therefore, the full dual pathway model may only be applicable to healthy weight binge eaters.

Is the relationship between sensory-processing sensitivity and negative affect mediated by emotional regulation?

© 2015 Australian Psychological Society. Objective: Sensory-processing sensitivity refers to a trait-like difference in the extent to which individuals strongly and deeply process a variety of stimuli in the environment. While being highly sensitive has been linked to increased experiences of distress, the reasons for this are not well known. One potential mediator of this effect is emotional regulation-the set of processes influencing which emotions we have, when we have them, and how we experience and express them. This study therefore aimed to investigate whether sensory processing sensitivity is linked to negative affect via emotional regulation processes. Method: N=157 participants (n=118 females) completed online questionnaires assessing negative affect, sensory-processing sensitivity, along with two multidimensional emotional regulation measures. Results: An individual's lack of access to emotional regulation strategies, greater awareness of emotion, and lack of acceptance towards feeling distressed, acted as partial mediators between sensory-processing sensitivity and symptoms of depression. Combinations of these variables also partially mediated the relationship between sensory-processing sensitivity and symptoms of anxiety and stress. Conclusions: It is suggested that repeatedly experiencing aversive sensory-states among those with increased sensory-processing sensitivity impacts on their general awareness and acceptance of internal states and the confidence that one can regulate them. This in turn leads to the experience of negative affective states. Limitations of the present study and implications for therapeutic interventions are discussed.

Effects of approach velocity and foot-target characteristics on the visual regulation of step length

Two questions emerge from the literature concerning the perceptual-motor processes underlying the visual regulation of step length. The first concerns the effects of velocity on the onset of visual control (VCO), when visual regulation of step length begins during goal-directed locomotion. The second concerns the effects of different obstacles such as a target or raised surface on step length regulation. In two separate experiments, participants (Experiment 1 & 2: n=12, 6 female, 6 male) walked, jogged, or sprinted towards an obstacle along a 10 m walkway, consisting of two marker-strips with alternating black and white 0.50 m markings. Each experiment consisted of three targeting or obstacle tasks with the requirement to both negotiate and continue moving (run-through) through the target. Five trials were conducted for each task and approach speed, with trials block randomised between the six participants of each gender. One 50 Hz video camera panned and filmed each trial from an elevated position, adjacent to the walkway. Video footage was digitized to deduce the gait characteristics. Results for the targeting tasks indicate a linear relationship between approach velocity and accuracy of final foot placement (r=0.89). When foot placement was highly constrained by the obstacle step length shortened during the entire approach. VCO was found to occur at an earlier tau-margin for lower approach velocities for both experiments, indicating that the optical variable ‘tau' is affected by approach velocity. A three-phase kinematic profile was found for all tasks, except for the take-off board condition when sprinting. Further research is needed to determine whether this velocity affect on VCO is due to ‘whole-body' approach velocity or whether it is a function of the differences between gait modes.

Plant natriuretic peptide active site determination and effects on cGMP and cell volume regulation

Natriuretic peptides (NP) were first identified in animals where they play a role in the regulation of salt and water balance. This regulation is partly mediated by intracellular changes in cyclic GMP (cGMP). NP immunoanalogues occur in many plants and have been isolated, with two NP encoding genes characterised in Arabidopsis thaliana L. (AtPNP-A and AtPNP-B). Part of AtPNP-A contains the region with homology to human atrial (A)NP. We report here on the effects of recombinant AtPNP-A and smaller synthetic peptides within the ANP-homologous region with a view to identifying the biologically active domain of the molecule. Furthermore, we investigated interactions between AtPNP-A and the hormone, abscisic acid (ABA). ABA does not significantly affect Arabidopsis mesophyll protoplast volume regulation, whereas AtPNP-A and synthetic peptides promote water uptake into the protoplasts causing swelling. This effect is promoted by the membrane permeable cGMP analogue, 8-Br-cGMP, and inhibited by guanylate cyclase inhibitors indicating that increases in cGMP are an essential component of the plant natriuretic peptides (PNP) signalling cascade. ABA does not induce cGMP transients and does not affect AtPNP-A dependent cGMP increases, hence the two regulators differ in their second messenger signatures. Interestingly, AtPNP-A significantly delays and reduces the extent of ABA stimulated stomatal closure that is also based on cell volume regulation. We conclude that a complex interplay between observed PNP effects (stomatal opening and protoplast swelling) and ABA is likely to be cell type specific.

The effect of affect in organizational settings

The study of emotion and affect on organizational settings has been steadily gaining momentum for much of the last decade. Important catalysts in this process have been the Emonet e-mail discussion group and the biannual International Conferences on Emotions and Organizational Life. The articles in this volume represent a selection of the best papers presented at the fourth Conference (which was conducted in London, England, in June, 2004), together with invited papers by some of the leading scholars in the field.
The theme of the book, "the effect of affect in organizations," was chosen to capture the centrality of emotion and affect in everyday organizational life. The opening chapter, co-authored by Howard Weiss, one of the inventors of "Affective Events Theory" (AET), sets the scene. At the heart of AET is the idea that organizational members experience daily hassles and uplifts that are reflected in their attitudes and behaviours. Following chapters flesh out the way that AET can be applied, covering a variety of constructs that relate to organizational life, including emotional intelligence, motivation, employee monitoring of web access, and emotional regulation. Other chapters deal with other aspects of emotion in organizations, such as loneliness, leader-member relationships in teams, organizational justice, negative behaviour, creativity, and organizational reactions to crisis situations. In the final chapter, Rob Briner and his colleagues round out the theme in a critical account of emotion in organizations.

Historical dynamics of the fur seal population : evidence of regulation by man?

The Australian fur seal (Arctocephalus pusillus doriferus) was severely over-exploited in the 18th and 19th centuries and until relatively recently its population had remained steady at well below estimated presealing levels. However, the population is now increasing rapidly (6%–20% per annum) throughout its range and there is a need to understand its dynamics in order to assess the potential extent and impact of interactions with fisheries. Age distribution (n = 156) and pregnancy rate (n = 110) were determined for adult females collected at a breeding colony on Seal Rocks, southeast Australia, in 1971–1972. Mean ± SE and maximum observed ages were 9.37 ± 0.41 and 20 years (n = 1), respectively. A stochastic modelling approach was used to fit an age distribution to the observed age-structure data and calculate rates of recruitment and adult survival. Annual adult female survival and recruitment rates between 1954 and 1971 were 0.478 ± 0.029 (mean ± SE) and 0.121 ± 0.007, respectively, suggesting that the population was experiencing a decline during the 1960s. The pregnancy rate increased from 78% at 3 years of age to an average of 85% between 4–13 years of age before significantly decreasing in older females (the oldest was 19 years of age). There was no significant effect of body mass or condition on the probability of a female being pregnant (P > 0.5 in both cases) and the nutritional burden of lactation did not appear to affect pregnancy rates or gestational performance. These findings suggest that the low survivorship was due to density-independent effects such as mortality resulting from interactions with fishers, which are known to have been common at the time. The recent increase in the population is consistent with anecdotal evidence that such interactions have decreased as fishing practices have changed.

Alcohol use and negative affect in the offence cycle

Introduction : It is commonly acknowledged that, for many offenders, alcohol use is strongly associated with criminal behaviour. The belief held by many professionals that the two phenomena are associated, probably in a causal way, has led to the inclusion of alcohol use as a ‘criminogenic need’ in many settings where rehabilitation programmes are used to reduce recidivism. However, the mechanisms and pathways involved in the alcohol–crime link remain poorly understood.

Argument and conclusion : This paper reviews the literature relating to alcohol–offending links and draws some inferences about the role of alcohol use as a criminogenic need in offender rehabilitation. It is proposed that the bi-directional relationship between alcohol use and negative affective states is important in understanding the offence cycle, and that deficits in self-regulation not only characterize both alcohol misuse and negative affect but are also implicated in the offending behaviour itself.

Information-based regulation of high-velocity foot-targeting tasks

Judging time-to-contact with a target is an important criterion for avoiding harm in everyday walking and running tasks, and maximizing performance in high-velocity sporting tasks. The information-based regulation of step length and duration during target-directed locomotion was examined in relation to gait mode, approach velocity, target task, expertise, and sporting performance during a series of four experiments. The first three experiments examined novice performers (Each n=12, 6 males, 6 females), whilst the last experiment examined expert gymnasts (n=5). Two reference strips with alternating 50cm black and white intervals were placed on either side of the approach strip for all of the experiments. One 50Hz-panning video camera filmed the approach from an elevated position. In Experiment 4, two stationary 250Hz cameras filmed the post-flight performance of the gymnastic vaults and, in addition, two qualified judges provided a performance score for each vaulting trial. The panning video footage in each experiment was digitized to deduce the gait characteristics. In Experiment 4, the high-speed video footage was analyzed three-dimensionally to obtain the performance measures such as post-flight height. The utilization of visual stimulus in target-directed locomotion is affected by the observer's state of motion as characterized by the mode of locomotion and also often the speed of locomotion. In addition, experience plays an important role in the capacity of the observer to utilize visual stimulus to control the muscular action of locomotion when either maintaining or adjusting the step mechanics. The characteristics of the terrain and the target also affect the observer's movement. Visual regulation of step length decreases at higher approach speeds in novice performers, where as expert performers are capable of increasing visual regulation at higher approach speeds. Conservatism in final foot placement by female participants accounts for the observed increase in distance from the critical boundary of the obstacle relative to toe placement. Behavioural effects of gender thus affect the control of final foot placement in obstacle-directed locomotion. The visual control of braking in target-directed locomotion is described by a tau-dot of-0.54. When tau-dot is below -0.54 a hard collision with the obstacle will occur, however, when tau-dot is above -0.54, a soft collision with the target will occur. It is suggested that the tau-dot margin defining the control of braking reveals the braking capacity of the system. In the target-directed locomotion examined a tau-dot greater than -0.70 would possibly exceed the braking capacity of the system, thus, leading to injury if performed. The approach towards the take-off board and vaulting horse in gymnastics is an example of target-directed locomotion in sport. Increased visual regulation of the timing and length of each step is a requirement for a fast running approach, a fundamental building block for the execution of complex vaults in gymnastics. The successful performance of complex vaults in gymnastics leads towards a higher judge's score. Future research suggestions include an investigation of visual regulation of step length in curved target-directed locomotion.

N-Acetylcysteine infusion does not affect glucose disposal during prolonged moderate-intensity exercise in humans

There is evidence that reactive oxygen species (ROS) signalling is required for normal increases in glucose uptake during contraction of isolated mouse skeletal muscle, and that AMP-activated protein kinase (AMPK) is involved. The aim of this study was to determine whether ROS signalling is involved in the regulation of glucose disposal and AMPK activation during moderate-intensity exercise in humans. Nine healthy males completed 80 min of cycle ergometry at 62 ± 1 of peak oxygen consumption ( . A 6,6-2H-glucose tracer was infused at rest and during exercise, and in a double-blind randomised cross-over design, N-acetylcysteine (NAC) or saline (CON) was co-infused. NAC was infused at 125 mg kg?1h?1for 15 min and then at 25 mg kg?1h?1for 20 min before and throughout exercise. NAC infusion elevated plasma NAC and cysteine, and muscle NAC and cysteine concentrations during exercise. Although neither NAC infusion nor exercise significantly affected muscle reduced or oxidised glutathione (GSH or GSSG) concentration (P> 0.05), S-glutathionylation (an indicator of oxidative stress) of a protein band of ?270 kDa was increased ?3-fold with contraction and this increase was prevented by NAC infusion. Despite this, exercised-induced increases in tracer determined glucose disposal, plasma lactate, plasma non-esterified fatty acids (NEFAs), and decreases in plasma insulin were not affected by NAC infusion. In addition, skeletal muscle AMPK? and acetyl-CoA carboxylase-? (ACC?) phosphorylation increased during exercise by ?3- and ?6-fold (P< 0.05), respectively, and this was not affected by NAC infusion. Unlike findings in mouse muscle ex vivo, NAC does not attenuate skeletal muscle glucose disposal or AMPK activation during moderate-intensity exercise in humans.

Regulation of granulocyte colony-stimulating factor and its receptor in skeletal muscle is dependent upon the type of inflammatory stimulus

The cytokine granulocyte colony-stimulating factor (G-CSF) binds to its receptor (G-CSFR) to stimulate hematopoietic stem cell mobilization, myelopoiesis, and the production and activation of neutrophils. In response to exercise-induced muscle damage, G-CSF is increased in circulation and G-CSFR has recently been identified in skeletal muscle cells. While G-CSF/G-CSFR activation mediates pro- and anti-inflammatory responses, our understanding of the role and regulation in the muscle is limited. The aim of this study was to investigate, in vitro and in vivo, the role and regulation of G-CSF and G-CSFR in skeletal muscle under conditions of muscle inflammation and damage. First, C2C12 myotubes were treated with lipopolysaccharide (LPS) with and without G-CSF to determine if G-CSF modulates the inflammatory response. Second, the regulation of G-CSF and its receptor was measured following eccentric exercise-induced muscle damage and the expression levels we investigated for redox sensitivity by administering the antioxidant N-acetylcysteine (NAC). LPS stimulation of C2C12 myotubes resulted in increases in G-CSF, interleukin (IL)-6, monocyte chemoattractant protein-1 (MCP-1), and tumor necrosis factor-α (TNFα) messenger RNA (mRNA) and an increase in G-CSF, IL-6, and MCP-1 release from C2C12 myotubes. The addition of G-CSF following LPS stimulation of C2C12 myotubes increased IL-6 mRNA and cytokine release into the media, however it did not affect MCP-1 or TNFα. Following eccentric exercise-induced muscle damage in humans, G-CSF levels were either marginally increased in circulation or remain unaltered in skeletal muscle. Similarly, G-CSFR levels remained unchanged in response to damaging exercise and G-CSF/G-CSFR did not change in response to NAC. Collectively, these findings suggest that G-CSF may cooperate with IL-6 and potentially promote muscle regeneration in vitro, whereas in vivo aseptic inflammation induced by exercise did not change G-CSF and G-CSFR responses. These observations suggest that different models of inflammation produce a different G-CSF response.

The role of traditional regulation in the Indigenous villages for conservation of village pattern

Balinese traditional architecture is a significant treasure which has been inherited to the Balinese descendants. Scholars over the last 50 years have identified this statement, pointing to the unique and distinctiveness of Balinese culture and its associated architecture. Their research documents Balinese architecture and culture of the past and how Balinese architecture has been affected by development pressures in Bali, and in the Indonesian nation as a whole. This knowledge can understood through their research that documents how the Balinese people interact with their society, to their spiritual realm and with their environment, and to their God which is integral to their philosophy of Tri Hita Karana which is their universal discourse. This historical relationship has ensured that Bali Island has become a major tourism destination and is considered one the most beautiful places on Earth, both of which result in increasing pressures upon Bali that directly affect the nature and quality of Balinese life.