Exemplar similarity and rule application

We report four experiments examining effects of instance similarity on the application of simple explicit rules. We found effects of similarity to illustrative exemplars in error patterns and reaction times. These effects arose even though participants were given perfectly predictive rules, the similarity manipulation depended entirely on rule-irrelevant features, and attention to exemplar similarity was detrimental to task performance. Comparison of results across studies suggests that the effects are mandatory, non-strategic and not subject to conscious control, and as a result, should be pervasive throughout categorization.     

Judging familiarity and emotion from very brief musical excerpts

In the present study, the gating paradigm was used to measure how much perceptual information that was extracted from musical excerpts needs to be heard to provide judgments of familiarity and of emotionality. Nonmusicians heard segments of increasing duration (250, 500, 1,000 msec, etc.). The stimuli were segments from familiar and unfamiliar musical excerpts in Experiment 1 and from very moving and emotionally neutral musical excerpts in Experiment 2. Participants judged how familiar (Experiment 1) or how moving (Experiment 2) the excerpt was to them. Results show that a feeling of familiarity can be triggered by 500-msec segments, and that the distinction between moving and neutral can be made for 250-msec segments. This finding extends the observation of fast-acting cognitive and emotional processes from face and voice perception to music perception.     

Personality,Childhood Experience,and Political Ideology

This article studies the relationship between the “big five” personality traits and political ideology in a large U.S. representative sample (N = 14,672). In line with research in political psychology, “openness to experience” is found to predict liberal ideology, and “conscientiousness” predicts conservative ideology. The availability of family clusters in the data is leveraged to show that these results are robust to a sibling fixed‐effects specification. The way that personality might interact with environmental influences in the development of ideology is also explored. A variety of childhood experiences are studied that may have a differential effect on political ideology based on a respondent's personality profile. Childhood trauma is found to interact with “openness” in predicting ideology, and this complex relationship is investigated using mediation analysis. These findings provide new evidence for the idea that differences in political ideology are deeply intertwined with variation in the nature and nurture of individual personalities.     

Word knowledge in the crowd: Measuring vocabulary size and word prevalence in a massive online experiment

We use the results of a large online experiment on word knowledge in Dutch to investigate variables influencing vocabulary size in a large population and to examine the effect of word prevalence—the percentage of a population knowing a word—as a measure of word occurrence. Nearly 300,000 participants were presented with about 70 word stimuli (selected from a list of 53,000 words) in an adapted lexical decision task. We identify age, education, and multilingualism as the most important factors influencing vocabulary size. The results suggest that the accumulation of vocabulary throughout life and in multiple languages mirrors the logarithmic growth of number of types with number of tokens observed in text corpora (Herdan's law). Moreover, the vocabulary that multilinguals acquire in related languages seems to increase their first language (L1) vocabulary size and outweighs the loss caused by decreased exposure to L1. In addition, we show that corpus word frequency and prevalence are complementary measures of word occurrence covering a broad range of language experiences. Prevalence is shown to be the strongest independent predictor of word processing times in the Dutch Lexicon Project, making it an important variable for psycholinguistic research.     

Neuroimaging of mental imagery: An introduction

Adaptive mechanisms to protect cognitive performance under stressors through compensation in energy investment have previously received much research attention. However, stressors have also often been found to substantially reduce both performance and investment. The mechanisms underlying this dual negative effect are still unclear. This study tested the hypothesis that stressors can immediately hamper performance, which in turn reduces energy investment in later phases. In an experiment (N=103), we compared control and stressor conditions (noise or time pressure), investigating the effects of stressors on performance and information-sampling investment (as behavioural measure of energy investment) in two phases of a judgement task. The results showed an instant negative effect of stressors on performance and a delayed negative effect on information-sampling investment. Furthermore, impaired initial performance predicted the decline in investment over time. Finally, the effects of stressors on investment decline were partially mediated through initial performance level. The present findings contribute to theories aiming to explain the relationship between hampered performance and motivational losses.     

Interaction in the psychoanalytic situation

In psychoanalytic psychotherapy we are primarily interested in psychic change and how to facilitate it for the better. Change is a universal property of matter, living or inanimate: everything in nature is influenced by everything else; interaction is ubiquitous. In the early years of psychoanalysis, the prevailing view was that therapeusis was essentially informational—insight and awareness would bring about changes in the ways one would experience events and respond to them. Over time, there has been a subtle shift from the informational perspective to the transformational, where insight is often retrospective rather than the active agent. The growing awareness of the need to be deeply recognized and responded to by another human being is reflective of this shift and has loomed ever larger in the interactive arena known as psychoanalysis. This paper focuses on a single facet of the need for recognition by another—the role of enacted response in effecting psychic change. It also addresses another level of the meaning of interaction: Whereas the internal interaction between perception and response has tended to be looked upon, in psychoanalysis, as unidirectional, the present discussion draws attention to the complexity of the bidirectional interaction between perception and response.     

Wish,Need, Drive: Motive in the Light of Dynamic Systems Theory and Edelman's Selectionist Theory

Almost all psychoanalytic theorizing posits some basic and presumably built-in motivational thrusts. The goal of this paper is to present an alternative way of thinking about the beginnings of motivation. I go into some detail about recent contributions from two areas of research: dynamic systems theory as applied by Esther Thelen to infantile motor development and Gerald Edelman's (1992) theory of “Neural Darwinism.” What emerges are two interlocking hypotheses: The first is that what we infer as drives or other versions of “basic” motivations are already a late development of motivational organizations that started out from a collection of rather primitive biases. The second hypothesis, based on dynamic systems thinking or complexity theory, is that a great many developmental features that appear to be driven by a built-in genetic program or design, are, in fact, the spontaneously emergent, and therefore the never completely predictable, resultant of the interplay of embedded, embodied, and environmental elements. It is also hypothesized that, just as motivational systems lead to the emergence of new capacities and functions, so too do new capacities beget new motivational derivatives in an ever-more complex developmental spiral. Early experience plays an enormously important and highly individual role in the creation of conative patterns that eventually crystalize into what we, as observers and theoreticians, begin to categorize into systems of motivation. Depending on the observer and his or her frame of reference, certain motivational systems are held to be superordinate to others; these then are held up as basic motives. As psychoanalysts we currently find ourselves in a situation of competing organizational systems vying for prominence. The multiplicity of such systems speaks to our uncertainty and the need for further study to clarify the many questions that this line of thinking evokes. The second section of this paper explores the relations among need, wish, impulse, and defense as varieties of motivational systems that have already crystalized out of the early beginnings of motivation.     

Experts and laymen grossly underestimate the benefits of argumentation for reasoning

Many fields of study have shown that group discussion generally improves reasoning performance for a wide range of tasks. This article shows that most of the population, including specialists, does not expect group discussion to be as beneficial as it is. Six studies asked participants to solve a standard reasoning problem—the Wason selection task—and to estimate the performance of individuals working alone and in groups. We tested samples of U.S., Indian, and Japanese participants, European managers, and psychologists of reasoning. Every sample underestimated the improvement yielded by group discussion. They did so even after they had been explained the correct answer, or after they had had to solve the problem in groups. These mistaken intuitions could prevent individuals from making the best of institutions that rely on group discussion, from collaborative learning and work teams to deliberative assemblies.     

The Impact of a Pre-Vocational Program on Cognition,Symptoms, and Work Re-Integration in Schizophrenia

This study measured the effects of a pre-vocational program on cognition, symptoms, and integration to work in schizophrenia. Twelve participants, receiving pharmacological treatment only, were compared to 14 participants, who were part of a pre-vocational program and who received pharmacological treatment on pre and post measures. The work skills training group was offered by an occupational therapist. Results showed statistically significant differences in negative and general symptoms, visual attention, learning, and integration to work when comparing the two groups in favor of the program. These results provide evidence of the positive effects of occupational therapy interventions in mental health.