Do details bug you? Effects of perceptual richness in learning about biological change

People often have difficulty in understanding processes of biological change, and they typically reject drastic life cycle changes such as metamorphosis, except for animals with which they are familiar. Even after a lesson about metamorphosis, people often do not generalize to animals not seen during the lesson. This might be partially due to the perceptual richness of the diagrams typically used during lessons on metamorphosis, which serves to emphasize the individual animal rather than a class of animals. In two studies, we examined whether the perceptual richness of a diagram influences adults' learning and transfer of knowledge about metamorphosis. One study was conducted in a laboratory setting, and the other was online. In both studies, adults who saw the bland diagram during the lesson accurately transferred more than adults who saw the rich diagram during the lesson.     

Political Animals: Luck, Love and Dignity

Human beings are both needy and dignified. How should we think about the relationship between our neediness and our worth? Card argues well that our vulnerability to luck is intertwined in the very conditions of moral agency. We can see the merit of her approach even more clearly by turning to some difficulties the Stoics have in preserving dignity while removing vulnerability. Stoicism does, however, help us to sort through the difficulties involved as we try to combine love of particular people with respect for all human life. Richardson is correct to suggest that love itself can animate the concern for all humanity; I also agree with him that institutions must play a major role in any solution to problems of inequality between nations. Although the “capabilities approach” offers an attractive account of one part of the goal of just political institutions, combining, as Moody-Adams suggests, respect for difference with a commitment to universal norms, I now believe that the capabilities account should be combined with a form of Rawlsian political liberalism that protects spaces within which citizens may pursue the good as they understand it.     

TRAINING PREDELINQUENT YOUTHS AND THEIR PARENTS TO NEGOTIATE CONFLICT SITUATIONS1

In response to parental requests for assistance in dealing with adolescent problem children, three parent-child pairs were taught negotiation responses to hypothetical conflict situations using behavior rehearsal and social reinforcement. The negotiation process was separated into component behaviors that were practised during simulations by each youth and his parent under the direction of trainers. Results indicated that (a) the procedures were successful in training youths and their parents in negotiation behaviors that produced agreements to conflict situations, and (b) these behaviors generalized to actual conflict situations in subjects' homes.     

Acquisition of matching to sample via mediated transfer

Two severely retarded Down's-syndrome boys learned a matching-to-sample performance through mediated transfer. The transfer paradigm involved three sets of stimuli, one auditory set (A) and two visual sets (B and C). The subjects were taught directly to do B-A and C-B matching, but experienced no direct association between C and A. They acquired the ability to do C-A matching without having been taught that performance directly. They also learned indirectly to name some of the visual stimuli, but naming was apparently not the mediator in the emergent C-A matching. The use of words and letters as stimuli highlighted the possible relevance of mediated associations in the indirect acquisition of elementary reading comprehension and oral reading. The acquisition of matching via mediated transfer also raised some new considerations concerning the role of coding responses in arbitrary matching to sample.