Rats place greater value on rewards produced by high effort: An animal analogue of the “effort justification” effect

The effort justification phenomenon, in which greater value is given to rewards that require more effort to obtain, is frequently explained in terms of cognitive dissonance (Festinger & Carlsmith, 1959). Here, we employed a novel combination of operant and lick analysis techniques to show that rats place more value on a sucrose reward when it follows high effort than when the same reward follows low effort. This is the first demonstration of a direct analogue of the effort justification phenomenon in nonhuman animals. As the behavior of rats is normally considered in terms of relatively simple mechanisms, the current results question the need for complex cognitive accounts for the effort justification phenomenon (in rats or humans). As an alternative, we examine the possibility that high effort produces an aversive state that enhances reward value by a process of contrast.     

The relative unnaturalness of atheism: On why Geertz and Markússon are both right and wrong

Commonly scholars in the cognitive science of religion (CSR) have advanced the naturalness of religion thesis. That is, ordinary cognitive resources operating in ordinary human environments typically lead to some kind of belief in supernatural agency and perhaps other religious ideas. Special cultural scaffolding is unnecessary. Supernaturalism falls near a natural anchor point. In contrast, widespread conscious rejection of the supernatural as in atheism appears to require either special cultural conditions that upset ordinary function, cognitive effort, or a good degree of cultural scaffolding to move people away from their maturationally natural anchor-points. Geertz and Markússon (2009) identify ways to strengthen cognitive approaches to the study of religion and culture, including atheism, but fail to demonstrate that atheism is as natural in a comparable respect as theism.     

Political Conservatism,Need for Cognitive Closure,and Intergroup Hostility

Two studies examined the interaction of political conservatism and the need for cognitive closure in predicting aggressiveness in intergroup conflict and hostility toward outgroups. In the first study, Polish participants indicated their preference for coercive conflict strategies in the context of a real‐life intergroup conflict. Only among participants who identify themselves as conservative, need for cognitive closure was positively and significantly related to preference for aggressive actions against the outgroup. In the second study, the predicted interaction was investigated in the context of the terrorist threat in Poland. The findings indicated that high in need for closure conservatives showed greater hostility against Arabs and Muslims only when they believed that Poland was under threat of terrorist attacks inspired by Islamist fundamentalism.     

A time of change: Behavioral and neural correlates of adolescent sensitivity to appetitive and aversive environmental cues

Adolescence is a developmental period that entails substantial changes in affective and incentive-seeking behavior relative to both childhood and adulthood, including a heightened propensity to engage in risky behaviors and experience persistent negative and labile mood states. This review discusses the emotional and incentive-driven behavioral changes in adolescents and their associated neural mechanisms, focusing on the dynamic interactions between the amygdala, ventral striatum, and prefrontal cortex. Common behavioral changes during adolescence may be associated with a heightened responsiveness to incentives and emotional cues while the capacity to effectively engage in cognitive and emotion regulation is still relatively immature. We highlight empirical work in humans and animals that addresses the interactions between these neural systems in adolescents relative to children and adults, and propose a neurobiological model that may account for the nonlinear changes in adolescent behavior. Finally, we discuss other influences that may contribute to exaggerated reward and emotion processing associated with adolescence, including hormonal fluctuations and the role of the social environment.     

Emotion and object processing in Parkinson’s disease

The neuropsychological literature on the processing of emotions in Parkinson’s disease (PD) reveals conflicting evidence about the role of the basal ganglia in the recognition of facial emotions. Hence, the present study had two objectives. One was to determine the extent to which the visual processing of emotions and objects differs in PD. The other was to assess the impact of cognitive load on the processing of these types of information. Thirty-one patients with idiopathic PD (IPD) under dopamine replacement therapy (DRT) were compared to 30 control subjects on emotion and object recognition tasks. Recognition of objects was more accurate and faster than recognition of facial expressions of emotion, for both groups of subjects. In a second experiment using an N-back procedure with the same stimuli—a more demanding task with a higher cognitive load—patients with IPD were as accurate as control subjects in detecting the correct sequential presentation of stimuli, but were much slower in their decision responses. This indicates that IPD patients under DRT are not impaired in encoding emotion or object information, but that they have difficulty with the processing demands of the N-back task. Thus, patients with IPD appear to be more sensitive to cognitive load than to type of information, whether facial emotions or objects. In this perspective, one must consider that a deafferented dopaminergic system has problems processing more complex information before one can posit the existence of deficits affecting a specific type of information.     

Cortisol,interleukins and S100B in delirium in the elderly

In independent studies delirium was associated with higher levels of cortisol, interleukin(IL)s, and S100B. The aim of this study was to simultaneously compare cortisol, IL-6, IL-8, and S100B levels in patients aged 65 years and older admitted for hip fracture surgery with and without delirium. Cortisol, IL-6, IL-8, and S100B were assayed in repeated blood samples. 120 patients (mean age 84 years, 62 patients with delirium) were included. Highest levels of IL-8 (27.1, 95% Confidence Interval (CI): 13.6–53.1 pg/ml) and cortisol (666, 95% CI: 475–859 nmol/L) were before delirium, but of IL-6 (84.3, 95% CI: 46.5–151.4 pg/mL) and S100B (0.18, 95% CI: 0.12–0.24 μg/L) during delirium. In multivariable analysis cortisol, LogIL-6, and LogS100B were significantly associated with delirium, but adjusted for pre-existing cognitive impairment, only LogS100B remained significantly associated. Cortisol, IL-6 and S100B may have a role in the pathogenesis of delirium, but S100B is the strongest independent marker.     

Network structure influences speech production

Network science provides a new way to look at old questions in cognitive science by examining the structure of a complex system, and how that structure might influence processing. In the context of psycholinguistics, clustering coefficient-a common measure in network science-refers to the extent to which phonological neighbors of a target word are also neighbors of each other. The influence of the clustering coefficient on spoken word production was examined in a corpus of speech errors and a picture-naming task. Speech errors tended to occur in words with many interconnected neighbors (i.e., higher clustering coefficient). Also, pictures representing words with many interconnected neighbors (i.e., high clustering coefficient) were named more slowly than pictures representing words with few interconnected neighbors (i.e., low clustering coefficient). These findings suggest that the structure of the lexicon influences the process of lexical access during spoken word production.     

Sex differences in the indirect effects of cognitive processes on anxiety through emotion regulation difficulties

Drawing on a gender roles theory of emotion regulation, we examined the specific facets of emotion regulation difficulties through which higher-order cognitive abilities may be related to anxiety. Participants (N = 225) completed self-report measures of emotion regulation difficulties and anxiety, and were administered neuropsychological tests assessing abstract reasoning and inhibition. PROCESS (Hayes, 2012) was used to estimate the direct and indirect effects of both inhibition and abstract reasoning on anxiety symptoms, with six dimensions of emotion regulation difficulties serving as multiple mediators operating in parallel. Results suggest that the relation between higher-order cognitive abilities and anxiety operate through distinct, sex-dependent emotion dysregulation mechanisms. For females, higher levels of inhibition and abstract thinking were associated with poorer clarity of emotions, which in turn, was associated with higher levels of anxiety symptoms. As such, over-attentiveness to, or over-analysis of, emotions may be particularly detrimental among females who have relatively higher abstract reasoning abilities. For males, higher inhibition was associated with greater perceived effectiveness in regulating negative emotions, which in turn, was associated with lower levels of anxiety symptoms. This finding suggests that mood regulation expectancies may be particularly important in understanding the pathogenesis of anxiety in males.     

The Utility of Cognitive Plausibility in Language Acquisition Modeling: Evidence From Word Segmentation

The informativity of a computational model of language acquisition is directly related to how closely it approximates the actual acquisition task, sometimes referred to as the model's cognitive plausibility. We suggest that though every computational model necessarily idealizes the modeled task, an informative language acquisition model can aim to be cognitively plausible in multiple ways. We discuss these cognitive plausibility checkpoints generally and then apply them to a case study in word segmentation, investigating a promising Bayesian segmentation strategy. We incorporate cognitive plausibility by using an age‐appropriate unit of perceptual representation, evaluating the model output in terms of its utility, and incorporating cognitive constraints into the inference process. Our more cognitively plausible model shows a beneficial effect of cognitive constraints on segmentation performance. One interpretation of this effect is as a synergy between the naive theories of language structure that infants may have and the cognitive constraints that limit the fidelity of their inference processes, where less accurate inference approximations are better when the underlying assumptions about how words are generated are less accurate. More generally, these results highlight the utility of incorporating cognitive plausibility more fully into computational models of language acquisition.