1,818 research outputs found
Phenological Attributes and Phylogenetic Relationships of \u3ci\u3eRhagoletis Juniperina\u3c/i\u3e Marcovitch (Diptera: Tephritidae) in the Great Lakes Region
Rhagoletis juniperina Marcovitch (Diptera: Tephritidae) infests Eastern Red Cedar (Juniperus virginiana L.) and other North American junipers. While several Rhagoletis species are of interest as orchard crop pests (apple maggot, blueberry maggot, cherry fruit fly) and as models for studying speciation (R. pomonella Walsh species group), R. juniperina is of interest because it may tie together evolutionarily the Nearctic and Palearctic Rhagoletis fauna. One goal of this study was to test two competing hypotheses first proposed by Bush (1966): i) that R. juniperina is more closely related to the Nearctic dogwood- infesting R. tabellaria (Fitch), to which it is morphologically similar; or ii) that R. juniperina is more closely related to the Eurasian juniper-infesting R. flavigenualis Hering. To study R. juniperina, which is rarely collected, we first established a local study site by collecting juniper berries from several sites in the Lansing, MI vicinity in fall 2010, finding a heavily-infested juniper tree on the Michigan State University campus. Preliminary mitochondrial COII sequences of reared pupae matched (99.8%) the R. juniperina COII sequence in GenBank, allowing tentative identification of these flies as R. juniperina. Subsequently, the morphology of adults reared from these pupae the following spring and summer confirmed this diagnosis. Phenological attributes of the Farm Lane Bridge population were determined via weekly fruit collections in fall 2011 and 2012, and “peak” larval infestation was found to occur during the first part of October, while mean post-diapause eclosion time was found to be approximately 103 days. Rhagoletis juniperina adults were also reared from infested junipers found in Wisconsin and North Carolina, indicating that the geographic range of R. juniperina on J. virginiana is broader than previously thought. Hymenopteran parasitoids of R. juniperina were also observed; both the egg parasitoid, Utetes juniperi (Fischer) (Hymenoptera: Branconidae), and a new pupal parasitoid (Coptera n. sp.) (Hymenoptera: Diapriidae) were reared from fruit and pupae, respectively, collected at the MSU campus site. Subsequent phylogenetic analyses based on mitochondrial COI sequences did not resolve the relationships of R. juniperina and R. pomonella or flies in the Rhagoletis tabellaria species group. The sole R. flavigenualis individual in our sample was placed sister to an unresolved trichotomy of three clades containing these Nearctic taxa. The analysis also revealed within-species haplotype variability in R. juniperina, with a 3.8% nucleotide sequence difference observed between COI sequences of the flies from MI, WI, and NC compared to the Ontario R. juniperina sequences in the Barcode of Life database
Psychosocial experiences of chronic illness in individuals with an intellectual disability: A systematic review of the literature
This is an author-produced version of an article accepted for publication in the Journal of Intellectual Disabilities and appeared online on 7/1/2015© 2015Background: Increased life expectancy has led to an increase in diagnoses of chronic illness in people with an intellectual disability; despite this increase, research about the psychological impact is rare. This review explored the psychosocial experiences of chronic illness in adults with an intellectual disability, revealing potential predictors and moderators of these experiences. Methods: Online databases were systematically searched to identify relevant literature, using predefined inclusion criteria. Of the 25,058 titles initially identified, 4 were included, that is, those collecting data on people with an intellectual disability and diagnosed with cancer (n = 2), chronic pain (n = 1) and diabetes (n = 1). Results: Narrative synthesis of the data identified six themes, namely, delayed diagnosis, information, communication and understanding, negative psychological consequences, negative physical consequences, social perception and social support. Conclusions: There are unmet needs within this population, including a lack of assistance in understanding their illness. A substantial gap in the literature should be addressed through further empirical work
Appetitive augmental functions and common physical properties in a pain-tolerance metaphor: An extended replication
Relational frame theory claims that the tacit understanding of metaphorical language rests upon our ability to derive relations based on relevant contextual cues; with metaphor aptness being a function of learning history and the number and nature of contextual cues presented. Recent experimental research has explored whether metaphor aptness plays a role in changing behaviour. Sierra, Ruiz, Flórez, Riaño Hernández, and Luciano (2016) demonstrated that the presence of common physical properties (herein common properties; “cold”) within a perseverance metaphor increased pain tolerance to the cold pressor task. When the metaphor also specified appetitive augmental functions (herein augmentals; “something important to you”), pain tolerance also increased. We tested the replicability of these findings under more stringent conditions, using a stratified (by sex) double-blind randomised-controlled experimental design. Eighty-nine participants completed baseline measures of psychological flexibility, cognitive fusion, generalised pliance, and analogical reasoning ability. Participants were then allocated to a pre-recorded audio-delivered metaphor exercise containing either: (i) common properties; (ii) augmentals; (iii) both; or (iv) neither (control condition). Participants completed the cold pressor task before and after intervention. We found no change in pain tolerance following intervention in any condition. Given potential implications for apt metaphor use for changing behaviour, further work is required to establish why the original study's findings were not replicated, to identify boundary conditions for the putative effect, and test metaphor use in ecologically valid settings
Convergent validity of ratings of perceived exertion during resistance exercise in healthy participants: A systematic review and meta-analysis
Background: The validity of ratings of perceived exertion (RPE) during aerobic training is well established; however, it’s validity during resistance exercise is less clear. This meta-analysis used the known relationships between RPE and exercise intensity (EI), heart rate (HR), blood lactate (BLa), blood pressure (BP) and electromyography (EMG) to determine the convergent validity of RPE as a measure of resistance exercise intensity and physiological exertion, during different forms of resistance exercise. Additionally, this study aims to assess the effect of several moderator variables on the strength of the validity coefficients, so that clearer guidance can be given on the use of RPE during resistance exercise.
Methods: An online search of 4 databases and websites (PubMed, Web of science, SPORT Discus and Research Gate) was conducted up to 28 February 2020. Additionally, the reference lists of the included articles were inspected manually for further unidentified studies. The inclusion criteria were; healthy participants of any age, a rating scale used to measure RPE, resistance exercise of any type, one cohort receiving no other intervention, and must present data from one of the following outcome measures: EI, HR, BP, EMG or BLa. Weighted mean effect sizes (r) were calculated using a random-effects model. Heterogeneity was assessed using the Tau2 and I2 statistics. Moderator analysis was conducted using random-effects meta-regression.
Results: One-hundred and eighteen studies were included in the qualitative synthesis, with 75 studies (99 unique cohorts) included in the meta-analysis. The overall weighted mean validity coefficient was large (0.88; 95% CI 0.84 to 0.91) and between studies heterogeneity was very large (Tau2 = 0.526, I2 = 96.1%). Studies using greater workload ranges, isometric muscle actions, and those that manipulated workload or repetition time, showed the highest validity coefficients. Conversely, sex, age, training status, RPE scale used, and outcome measure did not have an effect.
Conclusions: RPE provides a valid measure of exercise intensity and physiological exertion during resistance exercise, with effect sizes comparable or greater than those shown during aerobic exercise. Therefore, RPE may provide an easily accessible means of prescribing and monitoring resistance exercise training.
Registration: The systematic review protocol was registered on the PROSPERO database (CRD42018102640)
In search of scope: A response to Ruiz et al. (2020)
Deliberate and explicit replication attempts are becoming more common across the behavioral sciences. Whilst replicability has been recognized as a core feature of science for decades (if not centuries), the directness of today’s replication work requires us to consider carefully how we communicate our research and how we conceptualize our theories in light of differing findings.
This paper uses a concrete example to make a number of suggestions for how we, as a scientific community, ought to engage with replication attempts. Within Relational Frame Theory (RFT) there is a growing body of applied research on the effective use of metaphors to increase tolerance of aversive states. We conducted a replication of an earlier experimental analogue study (2020, this journal) and failed to find the specified effect. Ruiz et al. (2020, also this journal) have recently published a critical response in which they list a number of differences between our two studies which might account for the negative findings. We will use this series of three papers as our exemplum. We also take the opportunity to acknowledge some points of critique provided by Ruiz et al., and to set the record straight with respect to the differences between the original study and our replication attempt. We hope this discussion might help the CBS community to develop a coherent approach to the very current issue of replication
Contextual behavioural coaching: An evidence-based model for supporting behaviour change
As coaching psychology finds its feet, demands for evidence-based approaches are increasing both from inside and outside of the industry. There is an opportunity in the many evidence-based interventions in other areas of applied psychology that are of direct relevance to coaching psychology. However, there may too be risks associated with unprincipled eclecticism. Existing approaches that are gaining popularity in the coaching field such as Dialectic Behavioural Therapy and Mindfulness enjoy close affiliation with Contextual Behavioral Science (CBS). In this article, we provide a brief overview of CBS as a coherent philosophical, scientific, and practice framework for empirically supported coaching work. We review its evidence base, and its direct applicability to coaching by describing CBS’s most explicitly linked intervention – Acceptance and Commitment Therapy/Training (ACT). We highlight key strengths of ACT including: its great flexibility in regard of the kinds of client change it can support; the variety of materials and exercises available; and, the varied modes of delivery through which it has been shown to work. The article lays out guiding principles and provides a brief illustrative case study of Contextual Behavioural Coaching
Web-Based Psychological Interventions for People Living With and Beyond Cancer:Meta-Review of What Works and What Does Not for Maximizing Recruitment, Engagement, and Efficacy
BACKGROUND: Despite high levels of psychological distress experienced by many patients with cancer, previous research has identified several barriers to accessing traditional face-to-face psychological support. Web-based psychosocial interventions have emerged as a promising alternative. OBJECTIVE: This meta-review aimed to synthesize evidence on recruitment challenges and enablers, factors that promote engagement and adherence to web-based intervention content, and factors that promote the efficacy of web-based psychosocial interventions for patients with cancer and cancer survivors. METHODS: We conducted a systematic search of previous reviews that investigated the recruitment, engagement, and efficacy of web-based and app-based psychosocial interventions in adult patients with cancer and cancer survivors. We searched PubMed, CINAHL, PsycINFO, and the Cochrane Library database for relevant literature. The search terms focused on a combination of topics pertaining to neoplasms and telemedicine. Two independent authors conducted abstract screening, full text screening, and data extraction for each identified article. RESULTS: A total of 20 articles met eligibility criteria. There was inconsistency in the reporting of uptake and engagement data; however, anxiety about technology and perceived time burden were identified as 2 key barriers. Web-based psychosocial oncology interventions demonstrated efficacy in reducing depression and stress but reported weak to mixed findings for distress, anxiety, quality of life, and well-being. Although no factors consistently moderated intervention efficacy, preliminary evidence indicated that multicomponent interventions and greater communication with a health care professional were preferred by participants and were associated with superior effects. CONCLUSIONS: Several consistently cited barriers to intervention uptake and recruitment have emerged, which we recommend future intervention studies address. Preliminary evidence also supports the superior efficacy of multicomponent interventions and interventions that facilitate communication with a health care professional. However, a greater number of appropriately powered clinical trials, including randomized trials with head-to-head comparisons, are needed to enable more confident conclusions regarding which web-based psychosocial oncology interventions work best and for whom. TRIAL REGISTRATION: PROSPERO CRD42020202633; https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=20263
Membrane fatty acid composition and longevity of mammals and birds
The fatty acid composition of membrane lipids varies systematically among species in a manner that is consistent with their metabolic rate and longevity. Because the susceptibility of fatty acids to peroxidation relates directly to their extent of unsaturation, it is possible to calculate a peroxidation index (PI) for membranes through characterization of their specific fatty acid composition. Long-living mammals and birds have membrane lipids with a lower PI than shorter-living species. Bird and mammal species with the same maximum life span also have membrane lipids with essentially the same PI. Exceptionally long-living mammals and birds usually have membrane lipids high in monounsaturates, but low in polyunsaturates, with the consequence that the PI of their membrane lipids is as low as expected for their respective longevity. Longevity variation within species (whether due to calorie-restriction, extended longevity associated with specific strains, queen-worker differences in honey bees or inherited longevity differences among humans) is also associated with differences in membrane composition and PI. Membrane composition is specific for each species and PI appears to generally be resistant to dietary manipulation. It is postulated that membrane fatty acid composition is an important influence on aging and the determination of maximum life span
Phenological Attributes and Phylogenetic Relationships of \u3ci\u3eRhagoletis Juniperina\u3c/i\u3e Marcovitch (Diptera: Tephritidae) in the Great Lakes Region
Rhagoletis juniperina Marcovitch (Diptera: Tephritidae) infests Eastern Red Cedar (Juniperus virginiana L.) and other North American junipers. While several Rhagoletis species are of interest as orchard crop pests (apple maggot, blueberry maggot, cherry fruit fly) and as models for studying speciation (R. pomonella Walsh species group), R. juniperina is of interest because it may tie together evolutionarily the Nearctic and Palearctic Rhagoletis fauna. One goal of this study was to test two competing hypotheses first proposed by Bush (1966): i) that R. juniperina is more closely related to the Nearctic dogwood- infesting R. tabellaria (Fitch), to which it is morphologically similar; or ii) that R. juniperina is more closely related to the Eurasian juniper-infesting R. flavigenualis Hering. To study R. juniperina, which is rarely collected, we first established a local study site by collecting juniper berries from several sites in the Lansing, MI vicinity in fall 2010, finding a heavily-infested juniper tree on the Michigan State University campus. Preliminary mitochondrial COII sequences of reared pupae matched (99.8%) the R. juniperina COII sequence in GenBank, allowing tentative identification of these flies as R. juniperina. Subsequently, the morphology of adults reared from these pupae the following spring and summer confirmed this diagnosis. Phenological attributes of the Farm Lane Bridge population were determined via weekly fruit collections in fall 2011 and 2012, and “peak” larval infestation was found to occur during the first part of October, while mean post-diapause eclosion time was found to be approximately 103 days. Rhagoletis juniperina adults were also reared from infested junipers found in Wisconsin and North Carolina, indicating that the geographic range of R. juniperina on J. virginiana is broader than previously thought. Hymenopteran parasitoids of R. juniperina were also observed; both the egg parasitoid, Utetes juniperi (Fischer) (Hymenoptera: Branconidae), and a new pupal parasitoid (Coptera n. sp.) (Hymenoptera: Diapriidae) were reared from fruit and pupae, respectively, collected at the MSU campus site. Subsequent phylogenetic analyses based on mitochondrial COI sequences did not resolve the relationships of R. juniperina and R. pomonella or flies in the Rhagoletis tabellaria species group. The sole R. flavigenualis individual in our sample was placed sister to an unresolved trichotomy of three clades containing these Nearctic taxa. The analysis also revealed within-species haplotype variability in R. juniperina, with a 3.8% nucleotide sequence difference observed between COI sequences of the flies from MI, WI, and NC compared to the Ontario R. juniperina sequences in the Barcode of Life database
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