Shawn P. Gilroy  Brent A. Kaplan  Lindsay P. Schwartz  Derek D. Reed  Steven R. Hursh 《Journal of the experimental analysis of behavior》2021,115(3):729-746

Contemporary approaches for evaluating the demand for reinforcers use either the Exponential or the Exponentiated model of operant demand, both derived from the framework of Hursh and Silberberg (2008). This report summarizes the strengths and complications of this framework and proposes a novel implementation. This novel implementation incorporates earlier strengths and resolves existing shortcomings that are due to the use of a logarithmic scale for consumption. The Inverse Hyperbolic Sine (IHS) transformation is reviewed and evaluated as a replacement for the logarithmic scale in models of operant demand. Modeling consumption in the “log₁₀-like” IHS scale reflects relative changes in consumption (as with a log scale) and accommodates a true zero bound (i.e., zero consumption values). The presence of a zero bound obviates the need for a separate span parameter (i.e., k) and the span of the model may be more simply defined by maximum demand at zero price (i.e., Q₀). Further, this reformulated model serves to decouple the exponential rate constant (i.e., α) from variations in span, thus normalizing the rate constant to the span of consumption in IHS units and permitting comparisons when spans vary. This model, called the Zero-bounded Exponential (ZBE), is evaluated using simulated and real-world data. The direct reinstatement ZBE model showed strong correspondence with empirical indicators of demand and with a normalization of α (ZBEn) across empirical data that varied in reinforcing efficacy (dose, time to onset of peak effects). Future directions in demand curve analysis are discussed with recommendations for additional replication and exploration of scales beyond the logarithm when accommodating zero consumption data.  相似文献   

    

Shawn P. Gilroy  Raymond P. Tucker  Brian W. Bauer  Connor H. G. Patros 《Suicide & life-threatening behavior》2021,51(1):19-26

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Shawn P. Gilroy  Donald A. Hantula 《Journal of the experimental analysis of behavior》2018,109(2):433-449

A novel method for analyzing delay discounting data is proposed. This newer metric, a model‐based Area Under Curve (AUC) combining approximate Bayesian model selection and numerical integration, was compared to the point‐based AUC methods developed by Myerson, Green, and Warusawitharana (2001) and extended by Borges, Kuang, Milhorn, and Yi (2016). Using data from computer simulation and a published study, comparisons of these methods indicated that a model‐based form of AUC offered a more consistent and statistically robust measurement of area than provided by using point‐based methods alone. Beyond providing a form of AUC directly from a discounting model, numerical integration methods permitted a general calculation in cases when the Effective Delay 50 (ED50) measure could not be calculated. This allowed discounting model selection to proceed in conditions where data are traditionally more challenging to model and measure, a situation where point‐based AUC methods are often enlisted. Results from simulation and existing data indicated that numerical integration methods extended both the area‐based interpretation of delay discounting as well as the discounting model selection approach. Limitations of point‐based AUC as a first‐line analysis of discounting and additional extensions of discounting model selection were also discussed.  相似文献   

    

Elliott T. MacDonell  Shawn N. Geniole  Cheryl M. McCormick 《Aggressive behavior》2018,44(5):512-523

Individuals with larger facial width‐to‐height ratios (FWHRs) are judged as more threatening, and engage in more threat‐related behavior, than do individuals with smaller FWHRs. Here we identified components of threat potential that are related to the FWHR. In Study 1, the FWHR was correlated positively with physical threat potential (bicep size) in women and with both physical and psychological (anger proneness) threat potential in men. Behavioral aggression was measured in a subset of these participants using the Point Subtraction Aggression Paradigm (costly aggression) and a Money Allocation Task (non‐costly aggression). Psychological (but not physical) threat potential predicted non‐costly aggression and physical (but not psychological) threat potential predicted costly aggression. In Study 2, a separate set of participants judged the anger proneness, strength, or aggressiveness of male participants photographed in Study 1. Participants’ judgements of all three characteristics were associated with the FWHR, and there were sex differences in how aggressiveness was conceptualized (for women, aggressiveness was associated with anger proneness, for men, aggressiveness was associated with strength). These results are consistent with the hypothesis that the FWHR may be an adaptation to cue the threat potential of men.

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Shawn V. Giammattei 《Family process》2015,54(3):418-434

Dualistic notions about gender and sexuality have permeated the field of couple and family therapy. These binary constructions have been limiting for everyone, especially those who fall outside the male/female dichotomy. This article examines the impact of these binary notions, especially on transgender and gender‐creative individuals, couples, and families. Current theory and research in the field as they relate to gender identity, sexuality, and gender minority stress in couples and families are presented. Case examples are used to illustrate affirmative approaches to treatment issues such as coming out, safety, grief and loss, redefining relationships, and social/medical transitions that may arise for transgender or gender nonconforming (TGNC) individuals, couples, and families.  相似文献   

    

Shawn M. Colberg 《Modern Theology》2016,32(2):187-210

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Shawn L. Blue 《International Journal of Applied Psychoanalytic Studies》2014,11(1):94-96

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Christopher J. Ferguson  Shawn Smith  Heather Miller-Stratton  Stacey Fritz  Emily Heinrich 《Journal of aggression, maltreatment & trauma》2013,22(1):118-132

Many laboratory studies of aggression use a measure known as the modified Taylor Competitive Reaction Time Test (TCRTT), for which validation studies are lacking. Using sound blasts administered by the participant against a fictional human opponent, the TCRTT also allows for multiple methods of measuring aggression. The validity of the TCRTT was tested in 53 college student participants. Participants took a self-report measure of aggressiveness as well as neuropsychological measures of frontal lobe functioning predictive of aggression. Results were not supportive of the TCRTT's validity and indicated concerns regarding the use of the TCRTT as a measure of aggression. Results suggest that labaratory studies of media violence using the TCRTT are of questionable validity.  相似文献   

    

Bjorn Hubert‐Wallander  C. Shawn Green  Daphne Bavelier 《Wiley Interdisciplinary Reviews: Cognitive Science》2011,2(2):222-230

Visual attention is the set of mechanisms by which relevant visual information is selected while irrelevant information is suppressed, thus allowing the observer to function in a world made up of nearly infinite visual information. Recently, those who habitually play video games have been documented to outperform novices in a variety of visual attentional capabilities, including attention in space, in time, and to objects. Training studies have established similar improvements in groups of nongamers given experience playing these video games. Critically, not all video games seem to have such a beneficial effect on attention; it seems that fast‐paced, embodied visuo‐motor tasks that require divided attention (tasks commonly found in popular action games like Halo) have the greatest effect. At the core of these action video game‐induced improvements appears to be a remarkable enhancement in the ability to efficiently deploy endogenous attention. The implications of such an enhancement are relevant to a variety of real‐world applications, such as work force training, rehabilitation of clinical populations, and improvement of traditional educational approaches. WIREs Cogni Sci 2011 2 222–230 DOI: 10.1002/wcs.116 This article is categorized under:

• Psychology > Learning

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Shawn Floyd 《The Journal of religious ethics》2009,37(3):449-471

Contemporary philosophers often construe mercy as a supererogatory notion or a matter of punitive leniency. Yet it is false that no merciful actions are obligatory. Further, it is questionable whether mercy is really about punitive leniency, either exclusively or primarily. As an alternative to these accounts, I consider the view offered by St. Thomas Aquinas. He rejects the claim that we are never obligated to be merciful. Also, his view of mercy is not restricted to legal contexts. For him, mercy's scope is considerably broader, as it concerns a wide range of needs and hardships to which human beings are vulnerable. Such a view, I submit, affords a kind of normative depth lacking in many contemporary accounts. Unlike those views that construe mercy as either a supererogatory or legal concept, Aquinas's account illuminates mercy's obligatory nature and encourages us to make mercy a more salient fixture of our moral lives.  相似文献