Neuroscience and learning: lessons from studying the involvement of a region of cerebellar cortex in eyeblink classical conditioning

How the nervous system encodes learning and memory processes has interested researchers for 100 years. Over this span of time, a number of basic neuroscience methods has been developed to explore the relationship between learning and the brain, including brain lesion, stimulation, pharmacology, anatomy, imaging, and recording techniques. In this paper, we summarize how different research approaches can be employed to generate converging data that speak to how structures and systems in the brain are involved in simple associative learning. To accomplish this, we review data regarding the involvement of a particular region of cerebellar cortex (Larsell's lobule HVI) in the widely used paradigm of classical eyeblink conditioning. We also present new data on the role of lobule HVI in eyeblink conditioning generated by combining temporary brain inactivation and single-cell recording methods, an approach that looks promising for further advancing our understanding of relationships between brain and behavior.     

Shifts in Methodology and Theory in Menstrual Cycle Research on Attraction

This paper critically examines the hypothesis that different phases of the menstrual cycle induce changes in women’s mate preferences. Empirically, we show that literature on this topic may be particularly prone to experimenter degrees of freedom, in which experimenters increase their likelihood of finding significant effects through elasticity in methodological and analytical strategies (e.g., flexibility in calculation of fertile and nonfertile phases, exclusion criteria, moderators, and analysis of dependent variables). Theoretically, we address misconceptions presented by Gildersleeve and colleagues (2013a). We reveal inconsistencies in the theoretical foundation for this work and discuss tension between theory and data. In short, there is sound reason to question whether reported menstrual cycle effects in women’s mate preferences are indeed real.     

The Anxiety Sensitivity Index–3: Analyses of Dimensions,Reliability Estimates,and Correlates in Nonclinical Samples

Body image and self-steering behavior in a group of 40 African hospitalized paraplegics and two control groups of non-hospitalized Ss were investigated using the DAP and the PUTCO African TAT. It was hypothesized that the paraplegics would demonstrate a body image characterized by significant pathology and would have a higher loading on the passive-submission dimension than a control group of Ss. The results failed to substantiate the research hypotheses. Instead, the findings suggest that both groups were characterized by a field-dependent perceptual framework associated with indefinite body image boundaries and a lack of self-steering behavior. These findings are accounted for in terms of a developmental cultural interpretation.     

The Role of Hardiness and Grit in Predicting Performance and Retention of USMA Cadets

We examined the relative effectiveness of hardiness and grit as predictors of performance and retention among first year cadets at the USMA. Based on past research and theory, we expected that both hardiness and grit would predict unique variance in performance and retention even after controlling for past performance as measured by the Whole Candidate Score. Results of regression analyses revealed that hardiness and grit predicted unique variance in first year retention, but only hardiness predicted first year performance at USMA. These findings suggest that hardiness assessment and training may prove valuable in enhancing performance and retention within military training environments.     

The Continuing Role of Hardiness and Grit on Performance and Retention in West Point Cadets

Being an army reservist involves stress and uncertainty. While some individuals use exercise to cope with stress, no previous research has ever studied the relationship between army reservists exercise habits and perceived stress. The current study examined the hypothesis that Israeli army reserves in combat roles would report greater perceived stress and (to cope with the stress) exhibit more intensive exercise habits, as well as higher risk for exercise addiction, than the army reserves who are in a non-combat (i.e., office job) role and controls who are not in the army reserve. Participants (n = 277) completed questionnaires assessing their regular exercises habits, perceived stress, and risk for exercise addiction. The results showed that combat reserves scored higher on all dependent measures than non-combat reserves and controls. Perceived stress accounted for 38.8% to 56.6% of the variance in the risk of exercise addiction. Findings suggest that Israeli army reserves in combat role exercise more, for longer episodes, with greater reported intensity, and are at a greater risk for exercise addiction than the reserves in non-combat roles and controls. The higher risk for exercise addiction in the combat reserves, accompanied by a lower predictive power of the perceived stress, reflects a weaker association between these two variables in this group, most likely because combat reserves feel obliged to be physically fit in case of active deployment. This is the first study to show that differences in reservists’ roles is associated with different levels of risk for exercise addiction.     

Changing one's prejudiced ways: Awareness,affect, and self-regulation

In this chapter, we review and integrate efforts related to the internal conflict people experience over their often automatic prejudiced tendencies. We first describe the Should-Would Discrepancy questionnaire, which assesses people's awareness of responding with greater prejudice than their standards prescribe. Results from numerous studies showing awareness of prejudice-related discrepancies and examining validity issues are summarised. Studies examining the affective consequences of discrepant responses are then reviewed. The development and testing of a model concerning the self-regulation of prejudiced responses are described. The model explains how people establish cues for control, which facilitate the inhibition of prejudiced responses. Finally, acknowledging that people sometimes fail to self-regulate their prejudiced responses, we review recent investigations concerning the effects of confrontation by others on the subsequent control of prejudiced responses.     

Holistic reasoning on the other side of the world: validation of the analysis-holism scale in Mexicans

The universality of cognitive processes has been called into question. Research suggests that individuals from Eastern cultures (e.g., China, Korea) when compared to individuals from Western cultures (e.g., the United States) prefer to reason holistically. This line of research has not been extended to cultural groups far removed from cultures traditionally surveyed in cross-cultural research such as Hispanics. We conducted two studies to understand: 1) the generalizability of the construct of holistic reasoning in Mexicans, and 2) the preferred reasoning style of Mexicans when compared to U.S. Americans. Results support the generalization of the factor structure of holistic reasoning as originally hypothesized by Choi, Koo, and Choi (2007). The results of Study 2 suggest that Mexicans scored higher than U.S. Americans on certain aspects of holistic reasoning.     

Immunity to proactive interference is not a property of the focus of attention in working memory

The Focus of Attention (FOA) is the latest incarnation of a limited capacity store in which a small number of items, in this case four, are deemed to be readily accessible and do not need to be retrieved. Thus a corollary of these ideas is that those items in the FOA are always immune to proactive interference. While there is empirical support for instances of immunity to PI in short-term retention tasks that involve memory for four-item lists, there are also many instances in which PI is observed with four-item lists as well as instances where PI and immunity to PI can be shown in the same experiment. In contrast to the FOA assumptions, an alternative cue-based account predicts both the presence of PI and immunity to PI as a function of the relation between the cues available and the particular test. Three experiments contrasted the FOA assumptions and the cue-based approach in a short-term cued recall task in which PI is manipulated by testing whether the presentation of previous, similar items would interfere with immediate recall of three list items. The results indicated that even with very short lists, both PI and immunity to PI could be observed. The PI effects observed in our experiment are at odds with the FOA approach and are more readily explained using the cueing account.     

Web-based, psychosocial treatment for substance use disorders in community treatment settings

The purpose of this multisite clinical trial was to evaluate the effectiveness of a web-based version of the Community Reinforcement Approach, plus motivational incentives, within community-based, outpatient substance abuse treatment. This ongoing study is being conducted within the National Drug Abuse Treatment Clinical Trials Network, funded by the National Institute on Drug Abuse. Midway through the enrollment of 500 participants, the study is being implemented in 10 treatment programs across the United States. Information is provided on design, sample, intervention and technology, and preliminary lessons learned.