The abstraction of schematic representations from photographs of real-world scenes

Photographs of a downtown street scene were taken from four different locations. At each location the photographs were taken in 12 different directions, 30 deg apart. In the acquisition phase of the experiments, subjects learned to identify the photographs in terms of the location from which they were taken. The testing phase took place immediately after acquisition, after a 1-week delay, after a 6-month delay, and on one occasion after a 1-year delay. Subjects were tested for their ability to identify the camera location for previously seen and new photographs, to discriminate previously seen from new photographs f!.e., recognition), and to place the camera locations on a map of the street scene. The results of six experiments provided converging evidence that subjects abstracted a schematic representation of the spatial layout of the scene from the discrete, partially overlapping photographic samples presented during acquisition.     

Justification,excuse, and proof beyond reasonable doubt

The law requires criminal guilt to be proved beyond a reasonable doubt. There are two different approaches to construing this legal rule. On an epistemic approach, the rule is construed in terms of justified belief or knowledge; on a probabilistic approach, the rule is construed in terms of satisfying a probabilistic threshold. An epistemic construction of the rule has this advantage over a probabilistic construction: the former can while the latter cannot excuse the state from blame for a false conviction. This claim rests on an understanding of legal rules, legal justification for a finding of guilt and the central purpose of a criminal trial.     

Patterns of Change in Fairness Perceptions During the Hiring Process

The justice literature, to date, shows that changes in fairness perceptions over time are consequential for job attitudes. However, few studies have been directed at explicating how fairness perceptions change over time or individual differences in patterns of change. The present research attempts to fill this gap by exploring patterns of temporal changes in fairness perceptions toward the selection process during a hiring process and potential determinants for such change. In a 3‐wave longitudinal study of the entire hiring process (pre‐, in‐, and post‐process) using a latent growth mixture modeling approach, different patterns of change in perceived fairness were modeled. In addition, the role of Big Five personality factors to predict classes of temporal patterns was examined. Results suggest that, on average, fairness perceptions declined in a non‐linear way over time, with high initial levels of fairness perception corresponding to a lower rate of decline, and vice versa. Four unique classes of applicants exhibiting different initial scores and growth of fairness perceptions were identified, which were predicted by the personality factors of extraversion, agreeableness, and conscientiousness. Findings are discussed in terms of their implications for fairness theory and future research.     

The whole picture: Holistic body posture recognition in infancy

Holistic processing is tied to expertise and is characteristic of face and body perception by adults. Infants process faces holistically, but it is unknown whether they process body information holistically. In the present study, infants were tested for discrimination between body postures that differed in limb orientations in three conditions: in the context of the whole body, with just the isolated limbs that changed orientation, or with the limbs in the context of scrambled body parts. Five- and 9-month-olds discriminated between whole-body postures, but failed in the isolated-part and scrambled-body conditions, demonstrating holistic processing of information from bodies. These results indicate that at least some level of expertise in body processing develops quite early in life.     

Motivation Gains in Computer‐Supported Groups1

One challenge in computer‐supported groups is the maintenance of high performance motivation of group members because face‐to‐face interaction and social control are restricted. Based on research on the Kohler effect (Hertel, Kerr, & Messe, 2000), we expected high motivation of group members when their individual effort is highly instrumental for the group's success. First, a task paradigm was developed and validated to measure motivation in a computer task. Then, this paradigm was used to explore group members’ motivation in computer‐supported dyads without face‐to‐face contact. Consistent with our expectations, motivation (and performance) of the group members was high and even exceeded the baseline of individual work (thus revealing motivation gains) when the individual's contribution was highly instrumental for the dyad's success (i.e., weaker coworker under conjunctive task demand). When instrumentality was low (i.e., weaker coworker under additive task demand), inconclusive results were obtained. Overall, the results demonstrate that motivation gains can be produced in computer‐supported dyads, even without face‐to‐face interaction.     

Simultaneity and sequence in the perception of apparent motion

Motion perception usually is accompanied by the phenomenological impression of sequence as objects move through successions of locations. Nonetheless, there is accumulating evidence that sequential information is neither necessary nor sufficient for perceiving motion. It is shown here that apparent motion is specified by counterchange rather than sequence—that is, by co-occurring toward- and away-from-background changes at two spatial locations, regardless of whether the changes are simultaneous or sequential. Motion is perceived from the location of the toward to the location of the away change, even when the changes occur in reverse temporal order. It is not perceived for sequences of away or toward changes, as would be expected if motion were specified by onset or offset asynchronicity. Results previously attributed to onset and offset asynchrony are instead attributable to onsets and offsets occurring in close temporal proximity at the same location. This was consistent with units for detecting away and toward changes that are temporally biphasic; that is, they are excited by changes in one direction and inhibited by immediately preceding or immediately following changes in the opposite direction. These results are accounted for by a model for counterchange-specified motion entailing the biphasic detection of toward and away changes.     

Creating ‘Local Publics’: Responsibility and Involvement in Decision-Making on Technologies with Local Impacts

Science and Engineering Ethics - This paper makes a conceptual inquiry into the notion of ‘publics’, and forwards an understanding of this notion that allows more responsible forms of...     

Infants with colic: A study of maternal stress and anxiety

The purpose of this article is to broaden our understanding of colic and to explore the effects of infant colic both on the mother's stress level and on her anxiety about separation from her infant. A “colic” group of 20 mother-infant dyads was compared with a second, control “noncolic” group of equal size. Significant group differences in the amount of time the infants cried, fussed, and were in a quiet/awake state were found. Although no difference in maternal trait anxiety was found, mothers in the colic group reported higher levels of stress associated with their infants' crying behavior. This stress was inversely related to the amount of time the infants slept during a 24-hour period. Mothers in the colic group also expressed significantly greater anxiety about separating from their infants for short periods of time; but the lack of freedom was significantly less of a problem for them than it was for mothers in the noncolic group. We conclude that mothers of difficult infants are more anxious about being separated from their infants, but do not appear to feel “trapped” by their extra maternal duties.