Judgments of path, not heading, guide locomotion

To steer a course through the world, people are almost entirely dependent on visual information, of which a key component is optic flow. In many models of locomotion, heading is described as the fundamental control variable; however, it has also been shown that fixating points along or near one's future path could be the basis of an efficient control solution. Here, the authors aim to establish how well observers can pinpoint instantaneous heading and path, by measuring their accuracy when looking at these features while traveling along straight and curved paths. The results showed that observers could identify both heading and path accurately (approximately 3 degrees ) when traveling along straight paths, but on curved paths they were more accurate at identifying a point on their future path (approximately 5 degrees ) than indicating their instantaneous heading (approximately 13 degrees ). Furthermore, whereas participants could track changes in the tightness of their path, they were unable to accurately track the rate of change of heading. In light of these results, the authors suggest it is unlikely that heading is primarily used by the visual system to support active steering.     

Scalar Counters

Poisson processes—random pacemakers driving accurate counters—are common models for timers. Such clocks get relatively more accurate the faster they go. This is not true of real clocks, where the relative error is approximately constant, an example of Weber's law known as scalar timing. This distinction was the core problem motivating Gibbon's Scalar Expectancy Theory. Since worse pacemakers cannot generate scalar timing, the necessary variance must be found elsewhere. This article reviews three failure modes of counters and shows that any one (or all together) provides a mechanism for scalar timing. Unique microdeviations from proportional timing in real data provide signatures of underlying machinery. This paper assays the maps between these signatures and those of stochastic counters, finding family resemblances that range from kissing cousins to clones.     

Judgments of proportions

This study investigated the processes that underlie estimates of relative frequency. Ss performed 4 tasks using the same stimuli (squares containing black and white dots); they judged "percentages" of white dots, "percentages" of black dots, "ratios" of black dots to white dots, and "differences" between the number of black and white dots. Results were consistent with the theory that Ss used the instructed operations with the same scale values in all tasks. Despite the use of the correct operation, Ss consistently overestimated small proportions and underestimated large proportions. Variations in the distributions of actual proportions affected the extent to which Ss overestimated small proportions and underestimated large proportions in the direction predicted by range-frequency theory. Results suggest that proportion judgments, and by analogy probability judgments, should not be taken at face value.     

Judgments of associative memory

Judgments of associative memory (JAM) were indexed by ratings given to pairs of cue and response words. The normed probabilities, p(response|cue), were obtained from free association norms. The ratings were linearly related to the probabilities. The JAM functions were characterized by high intercepts ( approximately 50 on a 100 point scale) and shallow slopes (<0.5). The JAM function generalized across materials and method of rating. The function was not affected by expectancies or semantic similarity. Attempts to alter the function by making alternative responses more available were unsuccessful. A computer simulation model (MINERVA 2) exhibited the linear JAM function and successfully accounted for more complex phenomena (like the joint influence of forward and backward associative strengths on ratings). The shallow JAM slope appears to result from a fundamental lack of discrimination among associative strengths. The high intercept appears to result partly from an independent post-mnemonic source of bias producing over-estimation of association.     

The Experience of Agency: Feelings, Judgments, and Responsibility

ABSTRACT— The experience of agency refers to the experience of being in control both of one's own actions and, through them, of events in the external world. Recent experimental studies have investigated how people recognise a particular event as being caused by their own action or by that of another person. These studies suggest that people match sensory inputs to a prediction based on the action they are performing. Other studies have contrasted voluntary actions to physically similar but passive body movements. These studies suggest that voluntary action triggers wide-ranging changes in the spatial and temporal experience not only of one's own body but also of external events. Prediction and monitoring of the consequences of one's own motor commands produces characteristic experiences that form our normal, everyday feeling of being in control of our life. We conclude by discussing the implications of recent psychological work for our notions of responsibility for action.     

Controllability,Anger, Judgments,and Valence in Attributions for Civil Unrest

Abstract

Public self-consciousness is a major aspect of self-attention, concerned with attention to the self as a social object. In this study of American adults, public self-consciousness was tested against a number of variables with self-concept and/or socially conspicuous elements. Many relationships, involving public self-consciousness, stand out from the data analysis performed, including those with age, sexual self-image, and fashion-related variables, thus demonstrating the wide scope of public self-consciousness in relation to everyday behaviors and perceptions. Demographically, there were also racial and marital status differences in public self-consciousness.     

Judgments of genuine, suppressed, and faked facial expressions of pain.

The process of discriminating among genuine, suppressed, and faked expressions of pain was examined. Untrained judges estimated the severity of pain being experienced when viewing videotaped facial expressions of chronic pain patients undergoing a painful diagnostic test or dissimulating reactions. Verbal feedback as to whether pain was experienced also was provided, so as to be either consistent or inconsistent with the facial expression. Judges were able to distinguish genuine pain faces from baseline expressions but, relative to genuine pain faces, attributed more pain to faked faces and less pain to suppressed ones. Advance warning of deception did not improve discrimination but led to a more conservative or nonempathic judging style. Verbal feedback increased or decreased judgments, as appropriate, but facial information consistently was assigned greater weight. An augmenting model of the judgment process that attaches considerable importance to the context in which information is provided was supported.     

Sex Effects in Performance--Related Judgments

This study examined the relationships among objective performance, performance ratings, and pay allocations made by male and female managers. Because rater sex has been found to affect performance ratings and pay allocations, but little research has explored the causes of these sex differences, this study explored the effects of contextual factors that may moderate differences between the performance ratings and pay allocations of male and female raters. Two hundred twenty-nine managers assigned performance ratings and merit pay allocations to performance profiles that varied in levels of objective performance. It was found that: (a) sex effects on performance ratings were moderated by contextual variables, and b) sex and objective performance did not influence merit pay allocations independent of their separate effects on performance ratings.     

Judgments of learning and improvement

Can learners accurately judge the rate of their learning? Rates of learning may be informative when study time is allocated across materials, and students' judgments of their learning rate have been proposed as a possible metacognitive tool. Participants estimated how much they improved between presentations in multitrial learning situations in which n-gram paragraphs (in Experiments 1 and 2) or word pairs (Experiments 3 and 4) were learned . In the first experiment, participants rated improvement on a percentage scale, whereas on the second and third, judgments were given on a 0–6 scale. Experiment 4 used both a percentage scale and an absolute number scale. The main result was that judgments of improvement were poorly correlated with actual improvement and, in one case, were negatively correlated. Although judgments of improvement were correlated with changes in judgments of learning, they were not reliable indicators of actual improvement. Implications are discussed for theoretical work on metacognition.     

Judgments of duration, figure-ground contrast, and size for words and nonwords

Does the word-superiority effect on letter discrimination result in a word-superiority effect on duration judgments? We examined this question in five experiments. In the first four experiments, we have demonstrated that (1) words shown for 32-80 msec were judged as presented longer than non-words shown for the same duration; (2) this word-superiority effect persists if the stimuli are shown for an objective duration of up to 250 msec; and (3) these effects can be extended to judgments of figure-ground contrast and letter size. These findings extend existing data on effects of processing fluency on perceptual judgments. In Experiment 5, we found that duration judgments were higher for words than for pronounceable nonwords, and duration judgments were higher for pronounceable non-words than for nonpronounceable nonwords. We discuss the implications of this finding for the discrepancy-attribution hypothesis.     

Scalar implicature and contrastive explanation

I argue for a subsumption of any version of Grice’s first quantity maxim posited to underlie scalar implicature, by developing the idea of implicature recovery as a kind of explanatory inference, as e.g. in science. I take the applicable model to be contrastive explanation, while following van Fraassen’s analysis of explanation as an answer to a why-question. A scalar implicature is embedded in such an answer, one that meets two probabilistic constraints: the probability of the answer, and ‘favoring’. I argue that besides having application at large, outside of linguistic interpretation, these constraints largely account not only for implicatures based on strength order, logical and otherwise, but also for unordered cases. I thus suggest that Grice’s maxim and its descendants are expressions of general explanatory constraints, as they happen to be manifested in this particular explanatory task. I conclude by briefly discussing how I accordingly view Grice’s system outside of scalar implicature.     

Proper Names,Rigidity, and Empirical Studies on Judgments of Identity Across Transformations

Topoi - The question of transtemporal identity of objects in general and persons in particular is an important issue in both philosophy and psychology. While the focus of philosophers traditionally...     

Judgments of Occupations from Printed Photographs

Summary

Judgments of occupations were made from printed photographs, presented in series of pairs, the subject having been informed as to the occupational groups represented in the pairs. For all comparisons of groups, more right than wrong judgments were made. These differences were found to be reliable, and varied from slight (for comparisons of politicians with men of letters) to moderate (for comparisons of politicians with business men). The differences do not, however, warrant the existence of occupational types.

The asserted bases of judgment were found to be numerous and inconsistent, and are believed to be more frequently rationalizations, i.e., justifications, than the real determinants of judgment.