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PubMed2002

Carrying capacity as "Informed Judgment": the values of science and the science of values.

Contemporary park and wilderness carrying capacity frameworks rely on formulation of standards of quality, which are defined as minimum acceptable resource and social conditions. Formulation of standards of quality involves elements of both science and values, and both of these elements must be integrated into informed judgments on the part of park and wilderness managers. That is, managers must ultimately make value-based judgments about the maximum acceptable level of visitor-caused impacts to the resource base and the quality of the visitor experience. However, such judgments should be as informed as possible by scientific data on the relationships between visitor use and resulting impacts and the degree to which park and wilderness visitors and other interest groups judge such impacts to be acceptable. Such information represents the "values of science" to managing carrying capacity in parks and wilderness. A growing body of literature has begun to address the corresponding "science of values," and how this type of information might be integrated in park and wilderness management. Visitor-based research has employed normative theory and techniques to explore the acceptability of a range of resource and social impacts related to visitor use, and findings from these studies are being integrated into a body of knowledge and applied in management decision-making. Conceptual and methodological extensions of the normative approach are currently being explored in a variety of park and wilderness contexts, and new theoretical and empirical approaches are being adapted to address trade-offs inherent in carrying capacity. In these ways, the science of values is progressing to meet the opportunities and challenges of the values of science to park and wilderness management. The concept of carrying capacity, along with the theoretical and methodological approaches described in this paper, can be extended to a large number of natural resource and environmental issues.

Conservation of Natural Resources↗
PubMed1987

Focal right temporo-occipital blood flow changes associated with judgment of line orientation.

Focal cerebral blood flow changes for judgment of line orientation were determined using the 133Xe inhalation technique with 18 normal right-handed male subjects. Measurements were made during three conditions in the same session: a line orientation task, a sensorimotor control task, and normal rest. Blood flow changes attributable to the judgment of line orientation were found for the measure f1 at a detector centered over the right temporo-occipital region. For the measure IS this activation was significant in the temporo-occipital region in both hemispheres but significantly greater in the right hemisphere. For f1 the change in blood flow and for IS the percent change in blood flow in the right temporo-occipital region attributable to judgment of line orientation decreased as performance on the line orientation task improved.

Adolescent↗
PubMed1984

Numerosity judgments in peripheral vision: limitations of the cortical magnification hypothesis.

We studied visual numerosity judgments for linear dot arrays with regular spacing under central and off-axis observation conditions. Results indicate that an appropriate increase in stimulus size, as determined by the human cortical magnification factor, may compensate for the retinal inhomogeneity of numerosity judgments. Such a compensation, however, is no longer possible if in the numerosity judgments observers are deprived of the cue of overall dot-array length. Thus, there are aspects of the relative insensitivity of peripheral visual function that are not captured by purely geometrical considerations of the retino-cortical projection.

Adult↗
PubMed1988

Brain potentials during mental distance judgments.

Visual event-related potentials were recorded from a group of 10 normal subjects while they judged the proximity of two letters of the alphabet. Subjects viewed singly the letters A, D, G, L, N, T, W and Z and indicated by button press whether the letter displayed occurred before or after the comparison letter M. Reaction times to close letters (L and N) were longer than ordinally more distant letters (A, D, G, T, W, Z). A late parietally positive potential of approximately 475 ms covaried in latency and amplitude with these judgments. Late potentials were delayed in latency and reduced in amplitude to close letter (L and N) judgments compared to the other letters. The results suggest that mental processes, such as alphabetic distance judgments, may be usefully studied by examining their associated event-related potentials.

Adult↗
PubMed1990

Baby Doe regulations and medical judgment.

The potential for conflict between social policy and medical judgment can be examined in relation to the 'Baby Doe' regulations issued by the U.S. Federal Government in 1984. These regulations identify the circumstances in which medical treatment may be withheld from handicapped infants. This article reports on a national survey of perinatal social workers which compared their responses to the answers of physicians to similar questions published earlier. These social workers failed to express a conflict between sound medical judgment and the federal regulations when confronted with three hypothetical cases. The same was true in the published study of physicians but that data was erroneously interpreted as providing evidence of a conflict between medical judgment and federal regulations. On some general opinion statements, the social workers were similar to physicians in their criticism of these regulations but on others they were equivocal. While the majority of responses of social workers to other questions about these regulations was rather similar to the responses of physicians, the social workers were found to be more inclined than physicians to express the view that these regulations were needed to protect the rights of handicapped infants and the view that the physician's practice had been changed as a result of these regulations.

Ethics, Medical↗
PubMed2006

Clinical judgment and treatment options in stable multivessel coronary artery disease: results from the one-year follow-up of the MASS II (Medicine, Angioplasty, or Surgery Study II).

OBJECTIVES: This study examined the predictive power of clinical judgment in the incidence of cardiovascular end points in a group of individuals with multivessel coronary artery disease (CAD) followed up in the MASS II (Medicine, Angioplasty, or Surgery Study II). BACKGROUND: There is still no consensus on the best treatment for patients with stable multivessel CAD and preserved left ventricular function. METHODS: Preferred treatment allocation was recorded for each of the 611 randomized patients in the MASS II trial before randomization. We have divided our sample according to physician-guided decision and randomization result into two categories: concordant or discordant. The incidence of the points of cardiac death, myocardial infarction, and refractory angina was compared between concordant and discordant patients. RESULTS: The number of concordant individuals was 292 (48.2%), and this number was not different between the three studied treatments (p = 0.11). A significant difference (p = 0.02) was disclosed because of an increased incidence of combined end point events in discordant patients. In the multivariate Cox hazard model, clinical judgment was a powerful predictor of outcome (p = 0.01) even after adjustment for other covariates. The main subgroup explaining this difference was a significant shift toward a worse outcome in the subgroup of discordant patients who underwent percutaneous coronary intervention (PCI) (p = 0.003). CONCLUSIONS: Angiographic variables were more often used in making clinical decisions regarding PCI than clinical variables, and the only independent predictor of concordance status in the PCI group was the number of diseased vessels (p = 0.01). Our data are a reminder that physician judgment remains an important predictor of outcomes.

Aged↗
PubMed2003

Performing allocentric visuospatial judgments with induced distortion of the egocentric reference frame: an fMRI study with clinical implications.

The temporary improvement of visuospatial neglect during galvanic vestibular stimulation (Scand. J. Rehabil. Med. 31 (1999)117) may result from correction of the spatial reference frame distorted by the responsible lesion. Prior to an investigation of the neural basis of this effect in neurological patients, exploration of the neural mechanisms underlying such procedures in normals is required to provide insight into the physiological basis thereof. Despite their clinical impact, the neural mechanisms underlying the interaction of galvanic (and other) vestibular manipulations with visuospatial processing (and indeed the neural bases of how spatial reference frames are computed in man) remain to be clarified. We accordingly used fMRI in normal volunteers to investigate the effect of galvanically induced interference with the egocentric spatial reference frame on the neural processes underlying allocentric visuospatial (line bisection) judgments. A significant specific interaction of galvanic vestibular stimulation with the neural mechanisms underlying allocentric visuospatial judgments was observed in right posterior parietal and ventral premotor cortex only. Activation of these areas previously found to be damaged in visuospatial neglect suggests that these effects reflect the increased processing demands when compensating for the distorted egocentric spatial reference frame while maintaining accurate performance during the allocentric spatial task. These results thus implicate right posterior parietal and right ventral premotor cortex in the computation of spatial reference frames. Furthermore, our data imply a specific physiological basis for the temporary improvement of visuospatial neglect in patients with right hemisphere lesions during galvanic vestibular stimulation and may thus impact upon the rehabilitation of neglect: understanding the interaction of galvanic vestibular stimulation with allocentric visuospatial judgments in healthy volunteers may lead to the more effective deployment of such techniques in neurological patients.

Adult↗
PubMed2004

Involvement of right piriform cortex in olfactory familiarity judgments.

Previous studies have shown activation of right orbitofrontal cortex during judgments of odor familiarity. In the present study, we sought to extend our knowledge about the neural circuits involved in such a task by exploring the involvement of the right prefrontal areas and limbic/primary olfactory structures. Fourteen right-handed male subjects were tested using fMRI with a single functional run of two olfactory conditions (odor detection and familiarity judgments). Each condition included three epochs. During the familiarity condition, subjects rated whether odors were familiar or unfamiliar. During the detection condition, participants decided if odors were present. When contrasting the familiarity with the detection conditions, activated areas were found mainly in the right piriform cortex (PC) and hippocampus, the left inferior frontal gyrus and amygdala, and bilaterally in the mid-fusiform gyrus. Further analyses demonstrated that the right PC was more strongly activated than the left PC. This result supports the notion that the right PC is preferentially involved in judgments of odor familiarity.

Adolescent↗
PubMed2005

Left temporo-limbic and orbital dysfunction in schizophrenia during odor familiarity and hedonicity judgments.

Impairments of olfactory processing in patients with schizophrenia (SZ) have been reported in various olfactory tasks such as detection, discrimination, recognition memory, identification, and naming. The purpose of our study was to determine whether impairments in odor familiarity and hedonicity judgments observed in SZ patients during a previous behavioral study are associated with modifications of the activation patterns in olfactory areas. Twelve SZ patients, and 12 healthy comparison (HC) subjects, were tested using the H2(15)O-PET technique and 48 different odorants delivered during 8 scans. In addition to an odorless baseline condition, they had either to detect odor, or to judge odor familiarity or hedonicity, giving their responses by pressing a button. Regional cerebral blood flows during olfactory conditions were compared with those for baseline condition. Between-group analyses were then performed, and completed by regions of interest analyses. Both groups had equivalent ability for the detection of suprathreshold odorants, but patients found odors less familiar, and pleasant odors less pleasant than HC subjects. These behavioral results were related to functional abnormalities in temporo-limbic and orbital olfactory regions lateralized in the left hemisphere: the posterior part of the piriform cortex and orbital regions for familiarity judgments, the insular gyrus for hedonicity judgments, and the left inferior frontal gyrus and anterior piriform cortex/putamen region for the three olfactory tasks. They mainly resulted from a lack of activation during task conditions in the SZ patients. These data could explain olfactory disturbances and other clinical features of schizophrenia such as anhedonia.

Adult↗
PubMed2004

The neural bases of cognitive conflict and control in moral judgment.

Traditional theories of moral psychology emphasize reasoning and "higher cognition," while more recent work emphasizes the role of emotion. The present fMRI data support a theory of moral judgment according to which both "cognitive" and emotional processes play crucial and sometimes mutually competitive roles. The present results indicate that brain regions associated with abstract reasoning and cognitive control (including dorsolateral prefrontal cortex and anterior cingulate cortex) are recruited to resolve difficult personal moral dilemmas in which utilitarian values require "personal" moral violations, violations that have previously been associated with increased activity in emotion-related brain regions. Several regions of frontal and parietal cortex predict intertrial differences in moral judgment behavior, exhibiting greater activity for utilitarian judgments. We speculate that the controversy surrounding utilitarian moral philosophy reflects an underlying tension between competing subsystems in the brain.

Brain↗
PubMed2002

Norms with feeling: towards a psychological account of moral judgment.

There is a large tradition of work in moral psychology that explores the capacity for moral judgment by focusing on the basic capacity to distinguish moral violations (e.g. hitting another person) from conventional violations (e.g. playing with your food). However, only recently have there been attempts to characterize the cognitive mechanisms underlying moral judgment (e.g. Cognition 57 (1995) 1; Ethics 103 (1993) 337). Recent evidence indicates that affect plays a crucial role in mediating the capacity to draw the moral/conventional distinction. However, the prevailing account of the role of affect in moral judgment is problematic. This paper argues that the capacity to draw the moral/conventional distinction depends on both a body of information about which actions are prohibited (a Normative Theory) and an affective mechanism. This account leads to the prediction that other normative prohibitions that are connected to an affective mechanism might be treated as non-conventional. An experiment is presented that indicates that "disgust" violations (e.g. spitting at the table), are distinguished from conventional violations along the same dimensions as moral violations.

Adolescent↗
PubMed2002

Attentional control of texture orientation judgments.

Recent models of texture processing use low level, spatially parallel computations to extract texture properties. The rapid, preattentive nature of texture segregation suggests that these computations are bottom-up in nature. However, the immunity of texture judgments to top-down influences remains to be tested. Here we investigate the degree to which judgments of texture orientation are susceptible to top-down attentional control. Observers view a brief display composed of variously luminant texture elements (line segments) alternately (in checkerboard arrangement) oriented up/right (at 71.5 degrees ) or up/left (at 108.5 degrees ), and are asked to make various judgments. In a given task, the observer attempts on each trial to judge which oriented population of line segments has an intensity histogram that best matches a given target histogram. Performance demonstrates adaptive flexibility across different tasks, suggesting that observers are able to exercise significant top-down control over texture orientation computations. Specifically, observers can attend selectively to positive contrast texture elements, to negative contrast texture elements, or to high (positive and negative) contrast texture elements. More generally, observers perform well if the target histogram can be approximated by a weighted average of positive and negative half-wave rectifiers. Performance is poor for histograms that cannot be captured in this way. These results suggest that attentional control in these tasks is limited to adjusting the relative gain of the on- and off-center systems.

Attention↗
PubMed1998

The effects of motive information and crime unusualness on jurors' judgments in insanity cases.

This study investigated the effects of motive information and crime unusualness on mock jurors' judgments in two homicide cases in which the defendant pleaded insanity. Undergraduates (N = 371) read case information and rendered a verdict, estimated the probability that the defendant was insane, and made additional judgments about the defendant's mental state. The defendant was more likely to be judged insane if the crime was oddly committed rather than committed in a typical manner. Prosecution motive information also affected judgments; the defendant was considered more sane if the prosecution presented evidence of a strong, reasonable motive. Evidence of a "crazy," unreasonable motive, presented by the defense, caused jurors to see the defendant in one of the cases as more insane.

Adult↗
PubMed1985

Type A behavior pattern and the judgment of noncontingency: mediating roles of mood and perspective.

Past research indicates that Type A's and B's differ in their behavioral responses to lack of control. The present study examined perceptual judgments of noncontingency in an attempt to clarify further the role of a control dynamic in Type A-B differences. Type A's and B's assumed the role of either an actor or an observer on a standard contingency judgment task. Consistent with previous research, both Type A's and B's exhibited an illusion of control when in the role of actor. Only Type B's exhibited an illusion of control when observing another person perform the task. Additional analyses indicated that the absence of an illusion of control by Type A observers reflected accuracy rather than a motivational distortion. Mood was also found to mediate control judgments, but only for actors. The plausibility of a memory-based interpretation for the mood effects is discussed.

Achievement↗
PubMed1988

Event memory: temporal-order judgments of personal life experiences.

Three experiments with undergraduate subjects investigated the mental representations that people form when they recall and chronologically order their personal experiences. Subjects in each study first recalled five events that occurred to them in two general periods of their life (e.g., high school and college). Later, they saw pairs of these events and judged the order in which they occurred. It typically took less time to compare events that occurred in different time periods than events that occurred in the same period. However, response times depended on the serial positions of the compared events in each time period, and the distance between them, in ways that varied over the three experiments. These effects were interpreted in terms of a model of event memory and judgment proposed by Wyer, Shoben, Fuhrman, and Bodenhausen (1985). Specifically, subjects appear to organize the events they are asked to recall into categories defined by the periods of life in which they occurred and assign temporal codes to these categories. However, they do not perform a more detailed temporal coding of the events they recall unless a coherent temporal representation of these events is difficult to construct. A direct comparison between judgments of personal experiences and judgments of others' experiences suggested that people may make more detailed temporal coding of others' experiences than they do of their own.

Humans↗
PubMed1996

Biological significance in forward and backward blocking: resolution of a discrepancy between animal conditioning and human causal judgment.

Similarities between Pavlovian conditioning in nonhumans and causal judgment by humans suggest that similar processes operate in these situations. Notably absent among the similarities is backward blocking (i.e., retrospective devaluation of a signal due to increased valuation of another signal that was present during training), which has been observed in causal judgment by humans but not in Pavlovian responding by animals. The authors used rats to determine if this difference arises from the target cue being biologically significant in the Pavlovian case but not in causal judgment. They used a sensory preconditioning procedure in Experiments 1 and 2, in which the target cue retained low biological significance during the treatment, and obtained backward blocking. The authors found in Experiment 3 that forward blocking also requires the target cue to be of low biological significance. Thus, low biological significance is a necessary condition for a stimulus to be vulnerable to blocking.

Animals↗
PubMed1988

Evidence for auditory temporal distinctiveness: modality effects in order and frequency judgments.

Two new, long-lasting phenomena involving modality of stimulus presentation are documented. In one series of experiments we investigated effects of modality of presentation on order judgments. Order judgments for auditory words were more accurate than order judgments for visual words at both the beginning and the end of lists, and the auditory advantage increased with the temporal separation of the successive items. A second series of experiments investigated effects of modality on estimates of presentation frequency. Frequency estimates of repeated auditory words exceeded frequency estimates of repeated visual words. The auditory advantage increased with frequency of presentation, and this advantage was not affected by the retention interval. These various effects were taken as support for a temporal coding assumption, that auditory presentation produces a more accurate encoding of time of presentation than does visual presentation.

Adult↗
PubMed1999

Judgments about estrogen replacement therapy: the role of age, cognitive abilities, and beliefs.

This study investigated age, cognitive abilities, health beliefs, and other factors in women's judgments about effective treatments for menopause. Women (N = 102) ranging in age from 20 to 79 read a vignette about a woman facing a decision about Estrogen Replacement Therapy (ERT) and then made judgments about what should be done. Participants also completed a battery of questions pertaining to ERT and cognitive abilities. Path-analytic techniques were used to determine the role of specific cognitive abilities and the representation of menopause and its treatment in making judgments about ERT treatments. Cognitive abilities had direct effects on treatment decisions. Education affected the number of perceived options for treatment. Age and education indirectly affected treatment decisions, operating through cognitive abilities. Factors related to the mental representation of menopause had no direct effects and few indirect effects on treatment decisions. Potential mechanisms that can help older adults compensate for declines in cognitive abilities in medical decisions are discussed.

Adult↗