Creating an ethical organizational environment: The relationship between ethical leadership, ethical organizational climate, and unethical behavior

The purpose of this research is to provide a richer lens on the ethical organizational environment by examining the relationship between ethical leadership and unit‐level unethical behavior through ethical organizational climate (EOC), with collective moral identity as a boundary condition. In testing our theoretical model, we first develop and validate a measure of EOC to address concerns with existing measures of ethical climate. Second, we examine the role of collective moral identity as a moderator of the relationship between EOC and unit unethical behavior. We discuss implications regarding the importance of developing a more comprehensive conceptualization of EOC.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154480/1/peps12356.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154480/2/peps12356_am.pd

Diel plant water use and competitive soil cation exchange interact to enhance NH4+ and K+ availability in the rhizosphere

© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Plant and Soil 414 (2017): 33-51, doi:10.1007/s11104-016-3089-5.Hydro-biogeochemical processes in the rhizosphere regulate nutrient and water availability, and thus ecosystem productivity. We hypothesized that two such processes often neglected in rhizosphere models — diel plant water use and competitive cation exchange — could interact to enhance availability of K+ and NH4+, both high-demand nutrients. A rhizosphere model with competitive cation exchange was used to investigate how diel plant water use (i.e., daytime transpiration coupled with no nighttime water use, with nighttime root water release, and with nighttime transpiration) affects competitive ion interactions and availability of K+ and NH4+. Competitive cation exchange enabled low-demand cations that accumulate against roots (Ca2+, Mg2+, Na+) to desorb NH4+ and K+ from soil, generating non-monotonic dissolved concentration profiles (i.e. ‘hotspots’ 0.1–1 cm from the root). Cation accumulation and competitive desorption increased with net root water uptake. Daytime transpiration rate controlled diel variation in NH4+ and K+ aqueous mass, nighttime water use controlled spatial locations of ‘hotspots’, and day-to-night differences in water use controlled diel differences in ‘hotspot’ concentrations. Diel plant water use and competitive cation exchange enhanced NH4+ and K+ availability and influenced rhizosphere concentration dynamics. Demonstrated responses have implications for understanding rhizosphere nutrient cycling and plant nutrient uptake.This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Biological & Environmental Research Terrestrial Ecosystem Science program under Award Number DE-SC0008182 to Z.G.C. and R.B.N

PTSD and Pain: Exploring the Impact of Posttraumatic Cognitions in Veterans Seeking Treatment for PTSD

Objective Previous research has demonstrated a significant relationship between posttraumatic stress disorder ( PTSD ) and pain. While several models attempt to explain this relationship, significant questions remain regarding factors that may play a role in this interaction. The purpose of this study was to determine whether posttraumatic cognitions mediate the relationship between PTSD and pain. Design The sample comprised 136 veterans who presented to the VA A nn A rbor H ealth C are System seeking evaluation and treatment in the PTSD clinic. Participants completed the Clinician‐Administered PTSD Scale, the Posttraumatic Cognitions Inventory, and Brief Pain Inventory‐Short Form, along with other assessments as part of their evaluation. Results This study showed that the majority of patients (86.8%) reported some problems with pain. Further, the findings indicate that there is a significant relationship between PTSD severity and pain severity. Posttraumatic cognitions were not related to the level of pain experienced, but they were related to pain interference in this population. Conclusions In particular, negative cognitions regarding the self were associated with the level of pain‐related interference, and partially mediated the relationship between PTSD and pain. The clinical implications of these findings are discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/101855/1/pme12260.pd

A dot that went for a walk: People prefer lines drawn with human-like kinematics

A dominant theory of embodied aesthetic experience (Freedberg & Gallese, 2007) posits that the appreciation of visual art is linked to the artist’s movements when creating the artwork, yet a direct link between the kinematics of drawing actions and the aesthetics of drawing outcomes has not been experimentally demonstrated. Across four experiments we measured aesthetic responses of students from arts and non-arts backgrounds to drawing movements generated from computational models of human writing. Experiment 1 demonstrated that human-like drawing movements with bell-shaped velocity profiles (Sigma Lognormal (SL) and Minimum Jerk (MJ)) are perceived as more natural and pleasant than movements with a uniform profile, and in both Experiments 1 and 2 movements that were perceived as more natural were also preferred. Experiment 3 showed that this effect persists if lower-level dynamic stimulus features are fully matched across experimental and control conditions. Furthermore, aesthetic preference for human-like movements were associated with greater perceptual fluency in Experiment 3, evidenced by unbiased estimations of the duration of natural movements. In Experiment 4, line drawings with visual features consistent with the dynamics of natural, human-like movements were preferred, but only by art students. Our findings directly link the aesthetics of human action to the visual aesthetics of drawings, but highlight the importance of incorporating artistic expertise into embodied accounts of aesthetic experience

Mild Traumatic Brain Injury and Treatment Response in Prolonged Exposure for PTSD

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98185/1/jts21813.pd

Growth patterns in Onychophora (velvet worms): lack of a localised posterior proliferation zone

<p>Abstract</p> <p>Background</p> <p>During embryonic development of segmented animals, body segments are thought to arise from the so-called "posterior growth zone" and the occurrence of this "zone" has been used to support the homology of segmentation between arthropods, annelids, and vertebrates. However, the term "posterior growth zone" is used ambiguously in the literature, mostly referring to a region of increased proliferation at the posterior end of the embryo. To determine whether such a localised posterior proliferation zone is an ancestral feature of Panarthropoda (Onychophora + Tardigrada + Arthropoda), we examined cell division patterns in embryos of Onychophora.</p> <p>Results</p> <p>Using in vivo incorporation of the DNA replication marker BrdU (5-bromo-2'-deoxyuridine) and anti-phospho-histone H3 immunolabelling, we found that a localised posterior region of proliferating cells does not occur at any developmental stage in onychophoran embryos. This contrasts with a localised pattern of cell divisions at the posterior end of annelid embryos, which we used as a positive control. Based on our data, we present a mathematical model, which challenges the paradigm that a localised posterior proliferation zone is necessary for segment patterning in short germ developing arthropods.</p> <p>Conclusions</p> <p>Our findings suggest that a posterior proliferation zone was absent in the last common ancestor of Onychophora and Arthropoda. By comparing our data from Onychophora with those from annelids, arthropods, and chordates, we suggest that the occurrence of a "posterior growth zone" currently cannot be used to support the homology of segmentation between these three animal groups.</p