Decision theory,reinforcement learning,and the brain

Decision making is a core competence for animals and humans acting and surviving in environments they only partially comprehend, gaining rewards and punishments for their troubles. Decision-theoretic concepts permeate experiments and computational models in ethology, psychology, and neuroscience. Here, we review a well-known, coherent Bayesian approach to decision making, showing how it unifies issues in Markovian decision problems, signal detection psychophysics, sequential sampling, and optimal exploration and discuss paradigmatic psychological and neural examples of each problem. We discuss computational issues concerning what subjects know about their task and how ambitious they are in seeking optimal solutions; we address algorithmic topics concerning model-based and model-free methods for making choices; and we highlight key aspects of the neural implementation of decision making.     

The development of stranger fear in infancy and toddlerhood: normative development,individual differences,antecedents, and outcomes

Despite implications that stranger fear is an important aspect of developing behavioral inhibition, a known risk factor for anxiety, normative and atypical developmental trajectories of stranger fear across infancy and toddlerhood remain understudied. We used a large, longitudinal data set (N = 1285) including multi‐trait, multi‐method assessments of temperament to examine the normative course of development for stranger fear and to explore the possibility that individual differences exist in trajectories of stranger fear development between 6 and 36 months of age. A latent class growth analysis suggested four different trajectories of stranger fear during this period. Stable, high levels of stranger fear over time were associated with poorer RSA suppression at 6 months of age. Rates of concordance in trajectory‐based class membership for identical (monozygotic) and fraternal (dizygotic) twins, along with associations between atypical stranger fear development and greater anxiety‐related maternal characteristics, suggested that individual differences in developmental trajectories of stranger fear may be heritable. Importantly, trajectories of stranger fear during infancy and toddlerhood were linked to individual differences in behavioral inhibition, with chronically high levels of stranger fear and sharp increases in stranger fear over time related to greater levels of inhibition than other developmental trajectories.     

Concurrent and 2-Year Longitudinal Relations Between Executive Function and the Behavior of 1st and 2nd Grade Children

Concurrent and 2-year longitudinal relations were investigated between two indicators of children’s (n =60; mean age = years 11 months) executive function, inhibitory control and sequencing ability, and behavior problem symptomatology. Dependent measures were parent and teacher reported internalizing and externalizing behavior. Hierarchical multiple regression analyses demonstrated few significant concurrent associations between either inhibitory control or sequencing ability, and behavior problem symptoms. In contrast, baseline inhibitory control predicted decreased teacher reported externalizing, and parent reported externalizing and internalizing behavior problems over a 2-year period. Baseline sequencing ability also predicted decreased teacher reported externalizing and parent reported internalizing behavior over this same time period. Results suggest that some aspects of executive function in early elementary grade-school children may be more strongly associated with change in behavior over time than concurrent behavior. Implications of these findings for the prevention of behavior problems are discussed.     

Probabilism Today: Permissibility and Multi-Account Ethics

In ethics, ‘probabilism’ refers to a position defended by a number of Catholic theologians, mainly in the sixteenth and seventeenth centuries. They held that, when one is uncertain which of a range of actions is the right one to perform, it is permissible to perform any which has a good chance of being the right one—even if there is another which has a better chance. This paper considers the value of this position from the viewpoint of modern ethical philosophy. The unusual nature of probabilism as a theory focusing upon permissibility, rather than right-making properties, is explored and related to some modern attempts to set out ‘satisficing’ and ‘hybrid’ ethical theories. Such theories try to distinguish between what is best and what is permissible, and probabilism can be understood as an alternative way of supplementing a theory of right-making properties by adding to it a theory of permissibility. But a more radical version is also possible, where one abandons any attempt to identify right actions or right-making properties, and instead considers permissibility alone. Accordingly, a ‘multi-account theory’ of permissibility is proposed and defended as a model of how many people actually make moral decisions.     

Changes in meaning in life across the course of psychodynamic psychotherapy

Using the Meaning in Life Questionnaire (MLQ), we studied Presence and Search for meaning for 34 adult clients in psychodynamic psychotherapy. Clients completed the MLQ and Outcome Questionnaire (OQ) before intake and after every eight sessions. Variance in Presence scores was mostly attributable to clients; variance in Search scores was mostly attributable to clients and therapists. Clients initially high in Presence decreased and then increased back to initial levels; clients initially low in Presence increased and then decreased back to initial levels. Clients initially low in Search increased and then leveled off; clients initially high in Search decreased and then leveled off. In lagged cross panel analyses, when clients decreased in psychological distress during one eight-week time period, they increased in Presence during the next eight-week time period; when they increased in psychological distress during one eight-week time period, they increased in search in the next time period. Excerpts from post-therapy interviews illustrate the process of working with meaning in life in psychotherapy. Implications for practice and training are discussed.     

Trait-level emotion regulation and emotional awareness predictors of empathic accuracy

Empathic accuracy (or how accurately a person perceives another’s emotions) has important implications for how individuals navigate their social world. We examined the role of two emotion-related traits (emotion regulation and emotional awareness) in predicting empathic accuracy and how these relationships may vary across racial groups. Undergraduate participants (N?=?98) watched videos of European-American, Asian-American, and African-American targets playing a frustrating game and made continuous ratings of the target’s emotion. To assess empathic accuracy, these ratings were compared to targets’ self-reported emotion. We found mixed support for our initial hypotheses, such that individual differences in reappraisal and attention to emotions predicted accuracy under certain conditions. Exploratory analyses suggested suppression and emotional clarity have an interactive effect in predicting accuracy. This study provides evidence for the importance of individual differences in attention to and regulation of one’s own emotions for interpersonal sensitivity, as well as the importance of context for these emotion-related traits.

     

Sanctification of life and health: insights from the landmark spirituality and health survey

The purpose of this study is to examine the relationship between sanctification of life and health. Sanctification is defined as a process through which aspects of life are perceived as having divine character and significance. A latent variable model was created to test the following hypotheses that link sanctification with health: (1) people who attend worship services more often are more likely to develop a sanctified view of life; (2) individuals who develop a sanctified view of life are likely to be more compassionate, (3) people who are more compassionate will provide more emotional support to others, (4) providing more support to others will be associated with a greater sense of meaning in life, and (5) people who have derived a deeper sense of meaning in life will enjoy better health. Data from a new cross-sectional nationwide survey (N?=?2932) provide support for each of these hypotheses.