Comparisons in research and reasoning: Toward an integrative theory of social induction

Strong scientific theories give coherence to a body of research findings, make precise predictions about key phenomena, and guide the search for new discoveries. In social psychology, some contemporary theories fall short of this ideal. Mini-theories are prevalent (cf. Van Lange, Higgins, & Kruglanski, 2011), many predictions are merely directional (like this one!) and theorizing post-hoc. Guided by experimental reasoning, many researchers emphasize—and reify—empirical differences. Taking the experimental method as an epistemological gold standard, they regard comparative thinking as a criterion of rational thinking. Using examples from social judgment and decision making, we show how comparative reasoning can constrain theoretical development and bias assessments of human rationality. To encourage movement toward stronger theory, we describe a model of inductive reasoning in social contexts.     

Simon-like and functional affordance effects with tools: The effects of object perceptual discrimination and object action state

In the present study two separate stimulus–response compatibility effects (functional affordance and Simon-like effects) were investigated with centrally presented pictures of an object tool (a torch) characterized by a structural separation between the graspable portion and the goal-directed portion. In Experiment 1, participants were required to decide whether the torch was red or blue, while in Experiment 2 they were required to decide whether the torch was upright or inverted. Our results showed that with the same stimulus two types of compatibility effect emerged: one based on the direction signalled by the goal-directed portion of the tool (a Simon-like effect as observed in Experiment 1), and the other based on the actions associated with an object (a functional affordance effect as observed in Experiment 2). Both effects emerged independently of the person's intention to act on the stimulus, but depended on the stimulus properties that were processed in order to perform the task.     

Promoting Functional Ambulation with People with Blindness and Multiple Disabilities

An intervention package comprising auditory cues, physical prompts preceded by vibratory (anticipatory) stimuli, and reinforcement was used to promote ambulation to target places with 2 men with total blindness, profound intellectual disability, and behavioural problems. Data showed that both men acquired successful ambulation to the target places, becoming almost totally independent of the physical prompts. Implications of the findings are discussed.     

Children's Causal Explanations of Psychogenic Bodily Reactions

In Experiment 1, 4‐, 5‐, 8‐ and 11‐year‐old Japanese children (n = 69) and adults (n = 21) explained their reasons for bodily induced reactions (e.g. overeating leads to vomiting) and psychogenic bodily reactions (bodily outcomes originating in the mind, e.g. frustration leads to vomiting). Children gave vitalistic explanations, that is, explaining causal connections by referring to a vital force, in responses concerning bodily induced reactions, whereas adults typically gave these explanations in responses concerning psychogenic bodily reactions. In Experiment 2, 5‐, 8‐ and 11‐year‐old children (n = 96) and adults (n = 24) explained bodily induced and psychogenic bodily reactions, and psychological behaviour, for example, that frustration leads to nail biting. As in Experiment 1, vitalistic explanations tended to be found for psychogenic tasks but were seldom found in either children's or adults' explanations of psychological behaviour. The findings suggest that with age vitalistic causality obtains cross mind‐body implications. Copyright © 2013 John Wiley & Sons, Ltd.     

Intensity profiles of emotional experience over time

A full understanding of emotions and emotion characteristics can only be reached when their dynamic nature is taken into account. As such, a primary objective of the present study is to describe and account for variability in temporal profiles of experienced emotional intensity. Participants were asked to make detailed drawings of intensity profiles of recently experienced episodes of anger, sadness, joy and affection. Functional data analysis revealed three features that together accounted for 84% of the total variability: (i) steepness at onset; (ii) skewness; and (iii) the number of peaks. Emotions differed with regard to the first two features, with the rise at onset being steeper for sadness and joy and affection being the most negatively skewed emotion under study. Individual differences regarding each of the three features were found, however, they did not strongly generalise across emotions.     

Effects of chewing on cognitive processing speed

In recent years, chewing has been discussed as producing effects of maintaining and sustaining cognitive performance. We have reported that chewing may improve or recover the process of working memory; however, the mechanisms underlying these phenomena are still to be elucidated. We investigated the effect of chewing on aspects of attention and cognitive processing speed, testing the hypothesis that this effect induces higher cognitive performance. Seventeen healthy adults (20–34 years old) were studied during attention task with blood oxygenation level-dependent functional (fMRI) at 3.0 T MRI. The attentional network test (ANT) within a single task fMRI containing two cue conditions (no cue and center cue) and two target conditions (congruent and incongruent) was conducted to examine the efficiency of alerting and executive control. Participants were instructed to press a button with the right or left thumb according to the direction of a centrally presented arrow. Each participant underwent two back-to-back ANT sessions with or without chewing gum, odorless and tasteless to remove any effect other than chewing. Behavioral results showed that mean reaction time was significantly decreased during chewing condition, regardless of speed-accuracy trade-off, although there were no significant changes in behavioral effects (both alerting and conflict effects). On the other hand, fMRI analysis revealed higher activations in the anterior cingulate cortex and left frontal gyrus for the executive network and motor-related regions for both attentional networks during chewing condition. These results suggested that chewing induced an increase in the arousal level and alertness in addition to an effect on motor control and, as a consequence, these effects could lead to improvements in cognitive performance.     

Prototype-distortion category learning: a two-phase learning process across a distributed network

This paper reviews a body of work conducted in our laboratory that applies functional magnetic resonance imaging (fMRI) to better understand the biological response and change that occurs during prototype-distortion learning. We review results from two experiments (Little, Klein, Shobat, McClure, & Thulborn, 2004; Little & Thulborn, 2005) that provide support for increasing neuronal efficiency by way of a two-stage model that includes an initial period of recruitment of tissue across a distributed network that is followed by a period of increasing specialization with decreasing volume across the same network. Across the two studies, participants learned to classify patterns of random-dot distortions (Posner & Keele, 1968) into categories. At four points across this learning process subjects underwent examination by fMRI using a category-matching task. A large-scale network, altered across the protocol, was identified to include the frontal eye fields, both inferior and superior parietal lobules, and visual cortex. As behavioral performance increased, the volume of activation within these regions first increased and later in the protocol decreased. Based on our review of this work we propose that: (i) category learning is reflected as specialization of the same network initially implicated to complete the novel task, and (ii) this network encompasses regions not previously reported to be affected by prototype-distortion learning.     

Category-specific effects on the identification of non-manipulable objects

Theories of category-specific effects on visual object identification predict easier identification of non-living than living objects. The Sensory-Functional theory credits greater representational weighting of the visual properties of living objects independent of greater weighting of the functional properties of non-living objects. It predicts a lost or reversed non-living advantage for non-manipulable objects. Normal participants matched pictures of non-manipulable objects with words describing three levels of identity while visual object similarity, and concept familiarity were controlled. Consistent with the Sensory-Functional theory, living objects were matched faster than non-living objects. Concept familiarity facilitated subordinate matches. Visual similarity hampered subordinate matches and facilitated basic matches.     

Parents' Explanations of Their Child's Performance in Mathematics and Reading: A Replication and Extension of Yee and Eccles

This study was conducted to examine whether Finnish parents would endorse the the classic gender-related attribution pattern and explain their son's mathematical performance in terms of talent and their daughter's in terms of effort. In addition, we examined whether the pattern of attributions would be the opposite in regard to parental explanations of their child's reading performance. A group of parents (N = 486), both mothers and fathers, were requested to assess the level of competence of their 1st grader in mathematics and reading. The parents were also asked to recall events from their child's 1st school year in which the child succeeded and failed in mathematics and reading; they were then asked to evaluate the importance of talent, effort, and task to the child's outcomes. The parents of boys assessed their child's mathematical competence to be higher than did the parents of girls. Furthermore, the parents of boys rated talent as a more important reason for their child's mathematical success than did the parents of girls. In contrast, the parents of girls rated effort as a more important reason for their child's mathematical success. Although the girls were perceived to surpass boys in reading, the girls' positive outcomes in reading were explained by effort more than the boys' outcomes, and at the highest level of assessed competence, the boys' verbal talent was rated as a more significant cause of success in reading than the girls' verbal talent. In sum, our results suggested that in both mathematics and reading, girls were not entitled to ability-based attribution to the same extent as were boys.     

Ethical,and practical issues in applying functional imaging to the clinical management of Alzheimer's disease

This review outlines ethical, legal, and practical issues related to conducting functional imaging research with Alzheimer's disease (AD) patients. Imaging techniques, with an emphasis on functional MRI and positron emission tomography, are compared and contrasted with respect to the manner in which they can be applied to issues of clinical relevance to AD. Methodological difficulties are raised to assist with critical evaluation of current imaging results. Various potential clinical applications of functional imaging are briefly reviewed and discussed with respect to associated ethical conflicts.