Dialogues on prediction errors

The recognition that computational ideas from reinforcement learning are relevant to the study of neural circuits has taken the cognitive neuroscience community by storm. A central tenet of these models is that discrepancies between actual and expected outcomes can be used for learning. Neural correlates of such prediction-error signals have been observed now in midbrain dopaminergic neurons, striatum, amygdala and even prefrontal cortex, and models incorporating prediction errors have been invoked to explain complex phenomena such as the transition from goal-directed to habitual behavior. Yet, like any revolution, the fast-paced progress has left an uneven understanding in its wake. Here, we provide answers to ten simple questions about prediction errors, with the aim of exposing both the strengths and the limitations of this active area of neuroscience research.     

MATRIX OF TENSIONS

Questions about how women integrate maternity into their sense of self have generated a quest for an heuristic model. We suggest that mothers struggle to balance themselves amid a set of polarities/tensions and that mothering can be situated within a phenomenological matrix of such tensions. We propose a model that includes the following developmental issues: loss of self/expansion of self; omnipotence/liability; life-destroying/life-promoting behavior; maternal isolation/maternal community; cognitive strategies/intuitive responses; maternal desexualization/maternal sexualization. Investigation and understanding of how mothers cope with these tensions could yield insights into both universal and particular aspects of mothering.     

Two-Track Differentiation Paradigm in Psychotherapy

This paper describes the Two-Track Differentiation Paradigm, an updated therapeutic methodology within psychotherapy. The Two-Track Differentiation Paradigm is based on the assumption that patients habitually regard their problems as one-dimensional and thus tend to become rigid in their attitudes toward these problems. The paradigm suggests a psychotherapeutic process of enriched reframing called Differentiation. This Differentiation between patients’ negative and positive narratives and perceptions offers them more options and frees them to contend with their problems more effectively. Thus, with the Two-Track Differentiation Paradigm, cases of impasse and stuck psychotherapeutic situations are turned into cases of cooperation.     

Achievement-oriented and dependency-oriented parental psychological control: An examination of specificity to middle childhood achievement and dependency-related problems

Middle childhood is considered a sensitive phase for the development of both dependency and achievement-related problems. In order to target efficient prevention and treatment, it is necessary to identify unique associations with possible precursors. This study hypothesized that children’s dependency-related problems (i.e., separation anxiety and generalized anxiety) would uniquely relate to parental dependency-oriented psychological control and that children’s achievement-related problems (i.e., extrinsic motivation and maladaptive perfectionism) would uniquely relate to parental achievement-oriented psychological control. The study included 180 elementary school children. Results showed that higher levels of children’s separation anxiety uniquely related to more parental dependency-oriented psychological control, while higher levels of children’s extrinsic motivation uniquely related to more parental achievement-oriented psychological control. Contrary to the expectations, higher levels of children’s maladaptive perfectionism were associated with both dimensions of parental psychological control, and children’s generalized anxiety was not associated with any dimension. Study implications are discussed.     

Suggestion reduces the stroop effect

We examined the effects of suggestion on Stroop interference in highly suggestible individuals. Participants completed the Stroop task with and without a suggestion to perceive Stroop words as meaningless symbols. Half the participants were given this suggestion in hypnosis, and half were given the suggestion without the induction of hypnosis. Suggestion produced a significant reduction in Stroop inhibition, accounting for about 45% of the variance in Stroop responding, regardless of whether hypnosis had been induced. These findings indicate that suggestion can at least partially overcome the automaticity associated with the Stroop effect.     

Memory of the traumatic event as a risk factor for the development of PTSD: lessons from the study of traumatic brain injury

Traumatic memories, and the mechanisms by which they operate, continue to occupy a central role in the scientific investigation of risk factors for the development of posttraumatic stress disorder (PTSD). However, empirically based studies are constrained by practical and ethical considerations and are limited to naturalistic models. Consequently, the paradigms most appropriate for the exploration of the relationship between traumatic memories and PTSD have been identified in conditions involving traumatic events where memories may be compromised. Indeed, traumatic brain injury, a condition that is commonly associated with memory impairment, has often been utilized as a naturally occurring model for the study of traumatic memory and its contribution to the development of PTSD. This article presents a critical review of these research efforts and discusses their theoretical and clinical implications.     

Anagram software for cognitive research that enables specification of psycholinguistic variables

Anagram tasks are frequently used in cognitive research, and the generation of new scrambled letter combinations is a task well suited to a software solution. Most available programs, however, do not allow experimenters to generate new anagrams flexibly or to characterize existing anagrams using psycholinguistic criteria. They also do not provide detailed information on their source dictionaries. We present anagram software that interfaces with CELEX2, an internationally recognized psycholinguistic database. This software allows users to capitalize on lexical variables and thus enables direct control of psycholinguistic features that may influence the cognitive processes involved in anagram solution.     

Physical activity and psychological well-being in advanced age: a meta-analysis of intervention studies

A meta-analysis examined data from 36 studies linking physical activity to well-being in older adults without clinical disorders. The weighted mean-change effect size for treatment groups (d(C). = 0.24) was almost 3 times the mean for control groups (d(C). = 0.09). Aerobic training was most beneficial (d(C). = 0.29), and moderate intensity activity was the most beneficial activity level (d(C). = 0.34). Longer exercise duration was less beneficial for several types of well-being, though findings are inconclusive. Physical activity had the strongest effects on self-efficacy (d(C).= 0.38), and improvements in cardiovascular status, strength, and functional capacity were linked to well-being improvement overall. Social-cognitive theory is used to explain the effect of physical activity on well-being.