The influence of exploration mode, orientation, and configuration on the haptic Müller-Lyer illusion

We studied the impact of manner of exploration, orientation, spatial position, and configuration on the haptic Müller-Lyer illusion. Blindfolded sighted subjects felt raised-line Müller-Lyer and control stimuli. The stimuli were felt by tracing with the index finger, free exploration, grasping with the index finger and thumb, or by measuring with the use of any two or more fingers. For haptic judgments of extent a sliding tangible ruler was used. The illusion was present in all exploration conditions, with overestimation of the wings-out compared to wings-in stimuli. Tracing with the index finger reduced the magnitude of the illusion. However, tracing and grasping induced an overall underestimation of size. The illusion was greatly attenuated when stimuli were felt with the index fingers of both hands. Illusory misperception was not altered by the position in space of the Müller-Lyer stimuli. No effects of changes in the thickness of the line shaft were found, but there were effects of the length of the wing endings for the smaller, 5.1 cm stimuli. The theoretical and practical implications of the results are discussed.     

Post-retrieval beta-adrenergic receptor blockade: effects on extinction and reconsolidation of cocaine-cue memories

Contexts and discrete cues associated with drug-taking are often responsible for relapse among addicts. Animal models have shown that interference with the reconsolidation of drug-cue memories can reduce seeking of drugs or drug-paired stimuli. One such model is conditioned place preference (CPP) in which an animal is trained to associate a particular environment with the rewarding effects of a drug. Previous work from this laboratory has shown that intra-nucleus accumbens core infusions of a MEK inhibitor can interfere with reconsolidation of these drug-cue memories. A question that remains is whether post-retrieval drug effects on subsequent memories represent an interference with reconsolidation processes or rather a facilitation of extinction. In this experiment, we explore the effect of post-retrieval injections of propranolol, a beta-adrenergic receptor antagonist, on reconsolidation and extinction of cocaine CPP. After acquisition of cocaine CPP, animals were given post-retrieval propranolol injections once or each day during a protocol of unreinforced preference tests, until the animals showed no preference for the previously cocaine-paired environment. Following a cocaine priming injection, the animals that received daily post-test propranolol injections did not reinstate their preference for the drug-paired side. In contrast, a single post-retrieval propranolol injection followed by multiple days of unreinforced preference tests failed to blunt subsequent cocaine reinstatement of the memory. These data suggest that daily post-retrieval systemic injections of propranolol decrease the conditioned preference by interfering with reconsolidation of the memory for the association between the drug-paired side and the reinforcing effects of the drug, rather than facilitating new extinction learning.     

The Still-Face Paradigm and bidirectionality: Associations with maternal sensitivity,self-esteem and infant emotional reactivity

The Still-Face Paradigm (SFP) is a structured stressful event within which researchers have investigated the influence of maternal psychological and behavioral characteristics on infant behavior. The present investigation contributes to this body of work by examining the joint contributions of maternal and child behavioral and affective characteristics on subsequent behaviors and affectations following the SFP. A sample of non-clinically depressed mothers and their infants (n = 31) engaged in a modified Still-Face Paradigm (SFP), followed by a period of toy play. These interactions were videotaped and behaviorally coded along the following dimensions: maternal sensitivity prior to the SFP and during toy play, infant negative emotional reactivity during the still-face, and infant resistance during the reunion phase. Additionally, mothers reported global self-esteem and this was examined as a predictor of infant behavior. Results revealed significant bidirectional influences such that maternal self-esteem predicted infant emotional reactivity, maternal sensitivity pre-SFP predicted infant resistance during the reunion phase, and infant resistance predicted subsequent levels of maternal sensitivity. Indirect effects were also examined, and provided additional support for bidirectionality in mother–infant interactions. Implications for clinical practice are discussed in light of these findings.     

Using the myers‐briggs type indicator® in career counseling

The Myers‐Briggs Type Indicator® (MBTI®; I. B. Myers & K. C. Briggs, 1943/1976) is a personality instrument with numerous applications. The focus of this article is on its utilization in the career counseling process. Although limitations of the instrument exist and ethical issues regarding its usage have been itemized, information gained from clients' MBTI® assessments have been proved to be useful to professionals in counseling and strategizing with clients about clients' psychological preferences, optimal career families, and potential employment opportunities.     

Methods Used to Document Procedural Fidelity in School-Based Intervention Research

There has been a paucity of guidance on the methodological details needed for measuring and sampling the independent variable or actual intervention occurrences in research and practice. Furthermore, the planning and support necessary to document the independent variable in both circumstances may be considerable. The current study extends prior research by reviewing the methods used to document procedural fidelity in school-based intervention research with student participants published between 2005 and 2012 in journals known for publishing school-related intervention studies. Two hundred sixty-six articles met the inclusion criteria and the majority (70 %) used fidelity data in the analysis of intervention effectiveness. By systematically examining contributions of school-based intervention researchers across targeted variables as well as qualities of interventions and settings, suggestions can be made for (a) planning measurement of fidelity across phases of the intervention, (b) sampling fidelity occurrences, (c) preventing intervention failure by providing needed supports, and (d) responding to patterns of fidelity required for intervention and outcome measurement in both research and practice.     

How do employees react to leaders’ unethical behavior? The role of moral disengagement

Concerns over unethical leader behavior persist in today's workplace. Although some employees continue to support their leaders after learning of their unethical actions, others do not. In this paper, we integrate social cognitive theory with social information processing theory to propose that the support employees give to leaders who act unethically hinges on their propensity to morally disengage. Specifically, we develop a conditional indirect effects model, wherein moral disengagement propensity mitigates the negative impact of unethical leader behavior on leader-directed support via employees’ perceptions of value congruence with and trust in the leader. The sum result is an improved understanding of when and why employees offer support to versus withhold support from leaders who act in ethically questionable ways.     

Exploring the integration of thin-ideal internalization and self-objectification in the prevention of eating disorders

Analyses of thin-ideal internalization and self-objectification were conducted within the context of a cognitive dissonance based eating disorder prevention program implemented in an undergraduate sorority. Participants completed self-report assessments at baseline (n = 177), post-intervention (n = 169), 5-month (n = 159), and 1-year follow-up (n = 105). Cross-sectional path analysis indicated that thin-ideal internalization and self-objectification predict each other and both predict body dissatisfaction, which in turn, predicts eating disorder symptoms. A longitudinal examination conducted using hierarchical linear modeling indicated that participants showed significant reductions in thin-ideal internalization, self-objectification, body dissatisfaction, and eating disorder symptoms after participating in the prevention program. Reductions of symptoms were maintained 1-year post-intervention, with the exception of self-objectification, which was significantly reduced up to 5-months post-intervention. Collectively, results suggest that targeting both thin-ideal internalization and self-objectification simultaneously within eating disorder prevention programs could increase the reduction of eating disorder symptoms.     

Measuring microthreats in middle and high schools: a first step toward making schools safe for all students

Current Psychology - This study examined psychometric qualities of a scale assessing middle and high school students’ experiences with negative social interactions that we call...