Emotions are complex reactions that allow individuals to cope with significant positive and negative events. Research on emotion was pioneered by Darwin’s (1871) work on emotional expressions in humans and animals. But Darwin was concerned mainly with facial and bodily expressions of significance for humans, citing mainly examples from mammals (e.g., apes, dogs, and cats). In birds, emotional expressions are less evident for a human observer, so a different approach is needed. Understanding avian emotions will provide key evolutionary information on (...) the evolution of related behaviors and brain circuitry. Birds and mammals are thought to have evolved from different groups of Mesozoic reptiles, theropod dinosaurs and therapsids, respectively, and therefore their common ancestor is likely to be a basal reptile living about 300 million years ago, during the Carboniferous or Permian. Yet, birds and mammals exhibit extensive convergence in terms of relative brain size, high levels of activity, sleep/wakefulness cycles, endothermy, and social behavior, among others. This article focuses on two basic emotions with negative valence: fear and frustration. Fear is related to the anticipation of dangerous or threatening stimuli (e.g., predators or aggressive conspecifics). Frustration is related to unexpected reward omissions or devaluations (e.g., loss of food or sexual resources). These results have implications for an understanding of the conditions that promote fear and frustration, and for the evolution of supporting brain circuitry. (shrink)

The Serial Reaction Time Task (SRTT) was designed to measure motor sequence learning and is widely used in many fields in cognitive science and neuroscience. However, the common performance measures derived from SRTT—reaction time (RT) difference scores—may not provide valid measures of sequence learning. This is because RT-difference scores may be subject to floor effects and otherwise not sufficiently reflective of learning. A ratio RT measure might minimize floor effects. Furthermore, measures derived from predictive accuracy may provide a better assessment (...) of sequence learning. Accordingly, we developed a Predictive Sequence Learning Task (PSLT) in which performance can be assessed via both RT and predictive accuracy. We compared performance of N = 99 adults on SRTT and PSLT in a within-subjects design and also measured fluid abilities. The RT-difference scores on both tasks were generally not related to fluid abilities, replicating previous findings. In contrast, a ratio RT measure on SRTT and PSLT and accuracy measures on PSLT were related to fluid abilities. The accuracy measures also indicated an age-related decline in performance on PSLT. The current patterns of results were thus inconsistent across different measures on the same tasks, and we demonstrate that this discrepancy is potentially due to floor effects on the RT difference scores. This may limit the potential of SRTT to measure sequence learning and we argue that PSLT accuracy measures could provide a more accurate reflection of learning ability. (shrink)

Research on moral judgment has been dominated by rationalist models, in which moral judgment is thought to be caused by moral reasoning. The author gives 4 reasons for considering the hypothesis that moral reasoning does not cause moral judgment; rather, moral reasoning is usually a post hoc construction, generated after a judgment has been reached. The social intuitionist model is presented as an alternative to rationalist models. The model is a social model in that it deemphasizes the private reasoning done (...) by individuals and emphasizes instead the importance of social and cultural influences. The model is an intuitionist model in that it states that moral judgment is generally the result of quick, automatic evaluations (intuitions). The model is more consistent than rationalist models with recent findings in social, cultural, evolutionary, and biological psychology, as well as in anthropology and primatology. (shrink)

Nach einer kurzen Übersicht überDescartes' mechanistiche Theorie der somatischen Funktionen und der Reproduktion, wird in der vorliegenden Arbeit die Entwicklung dieser Theorie bis zur neuesten Zeit beschrieben. Sodann wird eine Übersicht gegeben über die vitalistische Theorie, welche unter wissenschaftlichen Forschern bis zur Mitte des vorigen Jahrhunderts vorherrschte. Dann werden die Gründe dafür angegeben, dass diese Theorie des Vitalismus ungefähr um diese Zeit verlassen wurde, um durch die mechanistische Theorie ersetzt zu werden. Diese ihrerseits ist jedoch auf einer unbegründeten metaphysischen Auffassung (...) vom Wesen der Wirklichkeit aufgebaut. Nehmen wir sie an, so können wir die synthetischen Einheit, die Gesamterscheinungsreihe, die wir unter dem Namen Reproduktion und Körperfunktion zusammenfassen, nicht richtig beschreiben. Der Begriff „Leben” ist eine Synthese aller Beziehungen, die zwischen dem Organismus und seiner Umwelt bestehen. Diese Auffassung des Lebens ist die Grundlage der Biologie, daher ist denn auch Biologie eine selbständige, unabhängige Wissenschaft.Zuletzt wird der Reflexbegriff behandelt. Die mechanistische Auffassung des Reflexbegriffes ist unrichtig, da alle Reflexfunktion synthetischen, oder integrativen Charakter hat. Wäre dem nicht so, dann würde das Nervensystem lediglich Chaos hervorzubringen imstande sein. Biologie, ohne die Gegebenheit des Lebens vorauszusetzen, ist unmöglich und wissenschaftliches Voraussagen auf dem Gebiete der Biologie ist überall nur auf Grund dieser Voraussetzung möglich.Après avoir donné un bref aperçu de la théorie mécanique cartésienne de l'activité corporelle et de la reproduction, l'article contenu dans cette revue trace le développment de cette théorie jusqu'à notre temps. Un bref aperçu est donné ensuite de la théorie vitaliste qui prévalait parmi les observateurs scientifiques jusqu'au milieu du siècle dernier. Après cela sont exposées les raisons pour lesquelles la théorie du vitalisme fut abandonnée de nos jours et il est démontré, qu'il est généralement admis que l'abandon de cette théorie implique l'adoption de la conception mécanique. Cette conception, cependant, est basée sur une conception métaphysique mal fondée se rapportant à la nature de la réalité et, en l'acceptant, nous ne pouvons exprimer ou décrire l'intégration qui apparait dans les phénomènes de reproduction et d'activité corporelle de toutes sortes. La vie c'est l'intégration soutenue s'étendant sur toutes les relations entre l'organisme et son entourage; et la conception de la vie, c'est la base de la biologie, de sorte que la biologie est une science indépendant.l'Article termine par une discussion de l'action-réflexe et démontre qu'une interprétation mécanique de l'action-réflexe est inadéquate, puisque l'intégration est incluse dans toute action-réflexe; car si tel n'était pas le cas, le système nerveux ne serait autre chose qu'un mécanisme à produire du chaos. La biologie ne peut pas se passer de la vie, comme sa conception fondamentale, et les prédicitions en matière de biologie sont toujours basées sur cette conception. (shrink)

This article provides the foundation for a new predictive theory of animal learning that is based upon a simple logical model. The knowledge of experimental subjects at a given time is described using logical equations. These logical equations are then used to predict a subject’s response when presented with a known or a previously unknown situation. This new theory suc- cessfully anticipates phenomena that existing theories predict, as well as phenomena that they cannot. It provides a theoretical account for phenomena (...) that are beyond the domain of existing models, such as extinction and the detection of novelty, from which “external inhibition” can be explained. Examples of the methods applied to make predictions are given using previously published results. The present theory proposes a new way to envision the minimal functions of the nervous system, and provides possible new insights into the way that brains ultimately create and use knowledge about the world. (shrink)

All humans experience itch in the course of their life. Even a discussion on the topic of itch or seeing people scratch can evoke the desire to scratch. These events are coined ‘contagious itch’ and are very common. We and others have shown that videos showing people scratching and pictures of affected skin or insects can induce itch in healthy persons and chronic itch patients. In our studies, patients with atopic dermatitis were more susceptible to visual itch cues than healthy. (...) Also, personality traits like agreeableness and public self-consciousness were associated with induced scratching in skin patients, while neuroticism correlated with induced itch in healthy subjects. The underlying course of contagious itch is not yet fully understood. It is hypothesized that there are human mirror neurons that are active when we imitate actions and/or negative affect. Until now, there has been only limited data on the mechanisms of brain activation in contagious itch though. We have barely begun to understand the underlying physiological reactions and the triggering factors of this phenomenon. We summarize what we currently know about contagious itch and provide some suggestions what future research should focus on. (shrink)

Different accounts of Skinner's work are often in conflict. Some interpretations, for example, regard Skinner as a mechanist. Other interpretations regard Skinner as a selectionist. An alternative interpretation is to see Skinner as employing both views with changes in these views and their proportionate relations over time. To clarify these distinctions, it is helpful to see Skinner's work against the background of similar changes that have been taking place in Western Culture. An extended and overlapping shift in cultural values has (...) occurred from modernism to postmodernism. Some key distinctions in this shift are that modernism emphasizes abstract simplicity, permanent necessity, and absolutely certain sources of truth. Postmodernism emphasizes complex and concrete contexts, probability, and explanations of change in terms of consequences. Skinner shows a similarly extended and overlapping shift over time that results in separate sets of responses which may be regarded as two sides or two selves of Skinner: one an organized collection of responses aligned with modernism, another an organized collection of responses aligned with postmodernism. (shrink)

ArgumentThe article retraces the shifting conceptualizations of psychological trauma in experimental psychopathological research in the middle decades of the twentieth century in the United States. Among researchers studying so-called experimental neuroses in animal laboratories, trauma was an often-invoked category used to denote the clash of conflicting forces believed to lead to neurotic suffering. Experimental psychologists, however, soon grew skeptical of the traumatogenic model and ultimately came to reject neurosis as a disease entity. Both theoretical differences and practical circumstances, such as (...) the technical challenge of stabilizing neurotic symptoms in rats, led to this demise. Yet, despite their reservations, experimental psychologists continued to employ traumatic stimuli to produce psychopathological syndromes. In the 1960s, a new understanding of trauma evolved, which emphasized the loss of control experienced by traumatized animal subjects. These shifting ideas about trauma, I argue, reflect both varying experimental cultures, epistemic norms as well as changing societal concerns. (shrink)

Abstract:Humans often comply with social norms, but the reasons why are disputed. Here, we unify a variety of influential explanations in a common decision framework, and identify the precise cognitive variables that norms might alter to induce compliance. Specifically, we situate current theories of norm compliance within the reinforcement learning framework, which is widely used to study value-guided learning and decision-making. This framework offers an appealingly precise language to distinguish between theories, highlights the various points of convergence and divergence, and (...) suggests novel ways in which norms might penetrate our psychology. (shrink)

Although a substantial literature is developing regarding the effects of stress on decision-making, the literature on stress and social decision-making is still in the beginning stage. The present research extends this new literature by examining the mediating and moderating factors of the effect of stress on social decision-making. Furthermore, a novel aspect of the research is its effort to connect the information-processing and functional perspectives, with regard to the acute stress response. Dual-mode theories state that emotional processing, relative to cognitive (...) processing, occurs early during information processing and is associated with stimulus-driven behaviors. Therefore, an intensification of emotional processing and inhibition of cognitive control processes may lead to an earlier and more stimulus-driven initiation of behavioral responses than under normal circumstances. Moreover, such quick, automatic behavioral responses to environmental stimuli may be particularly useful during an acute stress response in that such responses could help prevent disturbances to homeostasis. In order to facilitate such quick, automatic behavioral responses, emotional processing may be intensified and cognitive processing inhibited, during an acute stress response. In support of this notion, empirical findings show that acute stress increases emotion-related phenomena, such as reward salience and emotional learning. However, in a social decision-making context, such enhancement of emotional processing may negatively affect the social interactions, such that negative emotions from perceived unfairness may be amplified when people are undergoing an acute stress response. More specifically, in the context of an Ultimatum Game, people who are stressed may reject more unfair offers than people under normal conditions. This research tested this main hypothesis, and examined emotions and trait emotion regulation tendencies as mediating and moderating factors, respectively, of the relationship between acute stress and Ultimatum Game rejections. These arguments are elaborated in Chapters 1, 2, and 3 of this dissertation. In two experiments, participants played the Ultimatum Game as the Responder after completing a stress or control task. The Cold Pressor Test was used as the stress induction method. Before and after the Ultimatum Game, participants completed state emotion ratings as well as trait emotion regulation questionnaires. Results from Experiment 1 showed a successful stress induction, indicated by higher cortisol levels in the stress, relative to control, group. Moreover, Experiment 1 revealed a significant Stress x Amount interaction, with stress having an effect on rejections of unfair offers, in comparison to fair offers. However, the emotion and emotion regulation results did not indicate the expected pattern, with emotions being uncorrelated with fair, nor unfair offers, and emotion regulation being associated with reduced rejections of fair, but not unfair, offers. In Experiment 2, an experimental manipulation designed to influence negative emotions, namely partner type, was employed. Results did not replicate the results of the first experiment, but unexpected results were found involving partner type and negative emotions, namely that participants who played with human partners, relative to those who played with computer partners, rejected more unfair offers and that negative emotions were positively correlated with rejections of fair and unfair offers. The experiments and their results are described in Chapter 4. It is difficult to draw firm conclusions from these results, but they do offer a starting point for interesting future research questions. Chapter 5 discusses some implications as well as limitations of the present research. (shrink)

All recent memory theories of hippocampal function have incorporated the idea that the hippocampus is required to process items only of some qualitatively specifiahle kind, and is not required to process items of some complementary set. In contrast, it is now proposed that the hippocampus is needed to process stimuli of all kinds, but only when there is a need to associate those stimuli with other events that are temporally discontiguous. In order to form or use temporally discontiguous associations, it (...) is essential to maintain some memory of the first component until the second component has occurred. When the temporal gap to he spanned is small, and the number of items to be temporarily retained is low, a limited-capacity, short-term store is sufficient to allow associations to be formed. Such a store is presumed to operate in parallel with the hippocampus in normal animals. Hippocampal damage disrupts a much higher-capacity store that has a slower decay rate, and so leaves animals with only a very limited ability to form temporally discontiguous associations. Hippocampal damage, however, is not held to affect the long-term storage of associations of any kind, if they can be formed. Analyses of both new and existing data are presented to show that by classifying tasks in terms of the need to use a temporary memory store to retain temporally discontiguous information one can cut right across existing classifications as well as achieve a better fit to the data. The hippocampus thus seems best described as a high-capacity, intermediate-term memory store. (shrink)

Humans face many game problems that are too large for the whole game tree to be used in their deliberations about action, and very little is understood about how they cope in such scenarios. However, when a human player’s chosen strategy is conditioned on her limited perspective of how the game might progress, then it should be possible to manipulate her into changing her planned move by mentioning a possible outcome of an alternative move. This paper demonstrates that human players (...) can be manipulated this way: in the game The Settlers of Catan, where negotiation is only a small part of what one must do to win the game thereby generating uncertainty about which outcomes to the negotiation are good and which are bad, the likelihood that a player accepts a trade offer that deviates from their declared preferred strategy is higher if it is accompanied by a description of what that trade offer can lead to. (shrink)

Cells live in dynamic environments that necessitate perpetual adaptation. Since cells have limited resources to monitor external inputs, they are required to maximize the information content of perceived signals. This challenge is not unique to microscopic life: Animals use senses to perceive inputs and adequately respond. Research showed that sensory‐perception is actively shaped by learning and expectation allowing internal cognitive models to “fill in the blanks” in face of limited information. We propose that cells employ analogous strategies and use internal (...) models shaped through the long process of evolutionary adaptation. Given this perspective, we postulate that cells are prone to “misperceptions,” analogous to visual illusions, leading them to incorrectly decode patterns of inputs that lie outside of their evolutionary experience. Mapping cellular misperception can serve as a fundamental approach for dissecting regulatory networks and could be harnessed to modulate cell behavior, a potentially new avenue for therapy. (shrink)

Attention-Deficit Hyperactivity Disorder (ADHD) and Tourette Syndrome (TS) present as distinct conditions clinically; however, comorbidity and inhibitory control deficits have been proposed for both. Whilst such deficits have been studied widely within clinical populations, findings are mixed—partly due to comorbidity and/or medication effects—and studies have rarely distinguished between subtypes of the disorders. Studies in the general population are sparse. Using a continuity approach, the present study examined (i) the relationships between inattentive and hyperactive/impulsive aspects of ADHD and TS-like behaviors in (...) the general population, and (ii) their unique associations with automatic and executive inhibitory control, as well as (iii) yawning (a proposed behavioral model of TS). One hundred and thirty-eight participants completed self-report measures for ADHD and TS-like behaviors as well as yawning, and a conditioned inhibition task to assess automatic inhibition. A sub-sample of fifty-four participants completed three executive inhibition tasks. An exploratory factor analysis of the TS behavior checklist supported a distinction between phonic and motor like pure TS behaviors. Whilst hyperactive/impulsive aspects of ADHD were associated with increased pure and compulsive TS-like behaviors, inattention in isolation was related to reduced obsessive-compulsive TS-like behaviors. TS-like behaviors were associated with yawning during situations of inactivity, and specifically motor TS was related to yawning during stress. Phonic TS and inattention aspects of ADHD were associated with yawning during concentration/activity. Whilst executive interference control deficits were linked to hyperactive/impulsive ADHD-like behaviors, this was not the case for inattentive ADHD or TS-like behaviors, which instead related to increased performance on some measures. No associations were observed for automatic conditioned inhibition. (shrink)

The purpose of this paper is to investigate the ethical implications of video game companies employing psychologists and using psychological research in game design.,The author first argues that exploiting psychology in video games may be more ethically problematic than familiar application domains like advertising, gambling and political rhetoric. Then an overview of the effects particular types of game design may have on user behavior is provided, taking into account various findings and phenomena from behavioral psychology and behavioral economics.,Finally, the author (...) concludes that the corresponding ethical problems cannot – and should not – be addressed by means of regulation or rating systems. The author argues instead that a more promising countermeasure lies in using the same psychological research to educate gamers (children in particular) and thereby increase their capacity for meta-cognition.,The importance of this lies in the tremendous effect these behavior-modifying technologies may have upon our self-determination, well-being and social relations, as well as corresponding implications for the society. (shrink)

Pavlovian cues predict the occurrence of motivationally salient outcomes, thus serving as an important trigger of approach and avoidance behavior. The amygdala is a key substrate of Pavlovian conditioning, and the nature of its contribution varies by the motivational valence of unconditioned stimuli. The literature on aversive Pavlovian learning supports a serial-processing model of amygdalar function, while appetitive studies suggest that Pavlovian associations are processed through parallel circuits in the amygdala. It is proposed that serial and parallel forms of information (...) processing can be attributed to differential recruitment of amygdalar nuclei, with emphasis placed on the lateral amygdala. (shrink)

Our view is that fundamental appetitive and defensive motivation systems evolved to mediate a complex array of adaptive behaviors that support the organism’s drive to survive—defending against threat and securing resources. Activation of these motive systems engages processes that facilitate attention allocation, information intake, sympathetic arousal, and, depending on context, will prompt tactical actions that can be directed either toward or away from the strategic goal, whether defensively or appetitively determined. Research from our laboratory that measures autonomic, central, and somatic (...) reactions when processing emotional scenes is described which indicates that motivationally relevant cues, whether appetitive or defensive, capture attention preferentially, prompt enhanced perceptual processing and information gathering, and occasion metabolic arousal that mobilizes the organism for coping actions. (shrink)

In business settings, decision makers facing moral issues often experience the challenges of continuous changes. This dynamic process has been less examined in previous literature on moral decision making. We borrow theories on learning strategies and computational models from decision neuroscience to explain the updating and learning mechanisms underlying moral decision processes. Specifically, we present two main learning strategies: model-free learning, wherein the values of choices are updated in a trial-and-error fashion sustaining the formation of habits and model-based learning, wherein (...) the brain updates more general cognitive maps and associations, thus sustaining flexible and state-dependent behaviors. We then summarize studies explaining the neuro-computational processes of both learning strategies—the calculation of prediction errors and valuation. We conclude by emphasizing how the incorporation of dynamic aspects in moral decision making could open new avenues for understanding moral behaviors in a changing world. (shrink)