Organizational factors and the perception of motion in depth

When two stationary, stereoscopically separated targets are viewed in a completely dark surround, and no cues concerning their egocentric distances from the observer are salient, the farther target tends to be seen at the same distance it would have assumed if it were by itself. The nearer target is seen as being closer than it would have been if seen alone. The present studies extend this previous finding (now termed thefar-anchor effect) into the domain of targets that move in stereoscopic space. Observers viewed two small illuminated targets, which began at either the same or different stereoscopic distances. One of the targets was moved in depth and the observers identified the target that appeared to move. Conditions varied according to the initial depth location of the moving target. Significantly more correct responses were reported when the nearer target moved than when the farther one moved, consistent with the hypothesis that the perception of motion in depth is affected by the aforementioned perceptual anchoring effect of the farther target.     

三维空间深度位置上基于空间的返回抑制

采用虚拟现实技术,将Posner经典二维平面中的线索化范式应用到三维空间,通过两个实验操纵了注意沿着不同方向进行直线转移的方式,考察了注意在三维空间深度位置上进行定向/重定向而产生的晚期抑制效应(返回抑制,Inhibition of return)。结果发现：(1)无论注意沿着何种直线转移方式转移都在深度位置上发现了基于空间的返回抑制;(2)无效提示线索条件下,目标出现在三维空间近处空间时的反应显著快于目标出现在远处空间时的反应,导致了近远空间的返回抑制量存在差异。研究说明了返回抑制效应并不是“深度盲”。     

Occlusion as a depth cue in the Wheatstone-Panum limiting case.

We examined the hypothesis (Ono & Wade, 1985) that occlusion of far stimuli by a near one on the same visual line can operate as a depth cue in stereograms containing different numbers of targets in the two eyes. By controlling eye positions, we created conditions in which the visual system could interpret the retinal images as originating from stimuli on the visual axis of one eye and also created other conditions in which the origin of the retinal images was ambiguous. In Experiment 1, we presented two lines to one eye and a single line to the other eye. When the image of the line on the temporal side of the line pair on one retina fused with the image of the single line on the other retina, the nonfused line appeared farther away more often than it did when the image on the nasal side fused. In Experiment 2, we used two differently shaped stimuli. In the condition in which the nonfused stimulus represented an object being occluded, it appeared farther away more often than in the four conditions in which it did not. In Experiment 3, we extended the idea to three different objects. When the middle of the three images fused with the single image, the nonfused stimulus appeared farther when it could be interpreted as being occluded than when it could not. In the condition in which the most temporal image fused with the single image, the nonfused stimuli appeared farther than in the condition in which the most nasal one fused. The results supported the hypothesis that occlusion plays a role in depth perception in the Wheatstone-Panum limiting case.     

Occlusion as a depth cue in the Wheatstone-Panum limiting case

We examined the hypothesis (Ono & Wade, 1985) that occlusion of far stimuli by a near one on the same visual line can operate as a depth cue in stereograms containing different numbers of targets in the two eyes. By controlling eye positions, we created conditions in which the visual system could interpret the retinal images as originating from stimuli on the visual axis of one eye and also created other conditions in which the origin of the retinal images was ambiguous. In Experiment 1, we presented two lines to one eye and a single line to the other eye. When the image of the line on the temporal side of the line pair on one retina fused with the image of the single line on the other retina, the nonfused line appeared farther away more often than it did when the image on the nasal side fused. In Experiment 2, we used two differently shaped stimuli. In the condition in which the nonfused stimulus represented an object being occluded, it appeared farther away more often than in the four conditions in which it did not. In Experiment 3, we extended the idea to three different objects. When the middle of the three images fused with the single image, the nonfused stimulus appeared farther when it could be interpreted as being occluded than when it could not. In the condition in which the most temporal image fused with the single image, the nonfused stimuli appeared farther than in the condition in which the most nasal one fused. The results supported the hypothesis that occlusion plays a role in depth perception in the Wheatstone-Panum limiting case.     

The plasticity of near space: Evidence for contraction

The distinction between near space and the space farther away has been well established, as has the relation of this distinction to arm length. Recent studies provide evidence for the plasticity of near space, showing that it is possible to expand its extent (“size”) through tool-use. In the present study, we examine the converse effect, whether contraction of near space results from increasing the effort involved on a line bisection task. Adult participants bisected lines at different distances, while, in some cases, wearing weights. In Experiment 1, the arms, specifically, were weighted (wrist weights), and in Experiment 2, more general body weights were used (heavy backpack). As in previous studies, unencumbered participants showed leftward bias when bisecting lines at the closest distances and a rightward shift in bias with increasingly farther distances. With wrist weights, but not a heavy backpack, participants showed more rightward bias at the closest distances, and a more gradual rightward shift with increasing distance, as if the nearest locations were represented as being farther away. These results suggest that increased effort, when specifically related to the arm, can serve to reduce the size of near space, providing support for the generally symmetrical plasticity of near space representations.     

Numerical Subtraction in the Pigeon: Evidence for a Linear Subjective Number Scale

When humans and animals compare two numbers, responding is faster and more accurate with increasing numerical disparity and decreasing numerical size. Researchers explaining these distance and size effects often assume that the subjective number continuum is logarithmically compressed. An alternative hypothesis is that the subjective number continuum is linear, but positions farther along it are proportionately fuzzier, that is, less precisely located. These two hypotheses have been treated as functionally equivalent because of their similar empirical predictions. The current experiment sought to resolve this issue with a paradigm originally developed to address the subjective representation of time (time left). In our adaptation, pigeons were required to compare a constant number with the number remaining after a numerical subtraction. Our results indicate that subjective number is linearly, not logarithmically, related to objective number.     

Pictorial depth perception: Tasks levels imposed by testing instruments

Attempts to devise verbal and non-verbal instruments for measuring pictorial depth perception that are different from Hudson's (1960) have resulted in different perceptual demands. Whereas this was recognized by the constructors of non-verbal tests, it was not by those who changed Hudson's question “Which is nearer to the man…?” to “Which is/looks nearer/farther to you… ?”. While the latter question tests simple perception (or interpretation of cues) of pictorial depth, the former tests comprehension of complex pictorial space relations arising from the depth perceived. A verbal instrument that had been devised for testing simple pictorial depth interpretation, equivalent to Jahoda and McGurk's (1974) non-verbal instrument, was tested on Grade 3 Shona children against the hypothesis that the terms “nearer” and “farther” have different lexical markings likely to affect subject's responses. No support was found for the hypothesis, but Opolot's (1976) Grade 3 findings were able to be explained.     

Eye movement control in reading: evidence against semantic preprocessing.

Prior experiments reported by Underwood and his colleagues have suggested that information about the informative parts of parafoveal words that have not yet been fixated can influence where readers fixate next. The basic finding that they have reported is that the eyes move farther into a word when the information that uniquely identifies the word is at the end of the word rather than at the beginning of the word. On the basis of such results, it has been suggested that semantic preprocessing influences eye movement behavior in reading. Some theoretical and methodological problems are raised with the prior experiments and then an attempt to replicate the finding is reported. With a highly accurate eyetracking system, the basic finding could not be replicated. An alternative account of eye movement control in reading is discussed.     

Anisotropy in the extended haptic perception of longitudinal distances

Using horizontal rotational motions of a hand-held rod, participants in four experiments probed the aperture between two blocks separated in depth. The farther block could be either on the outer or on the inner side of the hand-rod system, defining apertures of opposite sense. The participants reported the perceived size of the in-depth intervals by adjusting, with the nonprobing hand, the lateral separation between two blocks or the egocentric distances of two blocks. Over variations in hand and geometric arrangement of stimulus and report blocks, perceived aperture size depended on the aperture's sense: Apertures with the farther edge on the outer side of the hand-rod were reported as being larger than their mirror image counterparts. The effect was not observed in judgments of a single edge distance (Experiment 5); it was configuration dependent. The sense effect would not be expected from the physical quantity accommodating perceived frontal apertures. Possible expansions of the physical model are discussed.     

A study of visual temporal size contrast

Stimuli exposed successively with an interpolated larger or smaller stimulus (IS) are subject to size-contrast effects to a highly significant degree. While stimuli nearer IS are, in general, more affected than stimuli farther away, there is some indication of paradoxical distance effect (PDE): Stimuli somewhat farther from IS are more affected than those nearest IS. Intermediate IS has a splitting effect in that stimuli above are judged larger, and those below are judged smaller, thus verifying the results with IS below and above the series stimuli. The relation of these results to figural aftereffects is stressed.     

Flexible route selection by pigeons (Columba livia) on a computerized multi-goal navigation task with and without an "obstacle"

The ability to select efficient routes while reaching several locations, in situations addressed as the "traveling salesperson problem (TSP)", seems to play an important role in the lives of nonhuman species as well as humans. One of our previous studies with pigeons (Columba livia) used different variations of computerized navigation tasks to move a target to one or more goals, and showed that the birds consistently exhibited tendencies to visit the nearest goal first (Miyata & Fujita, 2010). Is this inflexible tendency consistent across all situations, or is it abandoned if it leads to a nonefficient strategy? The present study compared pigeons' route selection strategies in two-goal navigation tasks with and without having an L-shaped line as an obstacle barrier between the starting location of the target and the nearer goal. The pigeons frequently started by visiting the nearer goal in trials with no obstacles, whereas in trials having obstacles the birds often visited the farther goal first. For the detour trials with obstacles, the birds started from visiting the farther goal significantly more often than chance, even though disparity between the two traveling sequences was relatively small. The data demonstrated a case in which a tendency to visit the nearest goal was flexibly abandoned when the route required a detour behavior. Detailed analyses of the movement paths further suggest that the pigeons made decisions to choose a farther goal during the initial few steps, although a past history of reinforcement to avoid the barrier might have guided the birds' behavior.     

Rhesus monkeys (<Emphasis Type="Italic">Macaca mulatta</Emphasis>) succeed on a computerized test designed to assess conservation of discrete quantity

Conservation of quantity occurs through recognition that changes in the physical arrangement of a set of items do not change the quantity of items in that set. Rhesus monkeys (Macaca mulatta) were presented with a computerized quantity judgment task. Monkeys were rewarded for selecting the greater quantity of items in one of two horizontal arrays of items on the screen. On some trials, after a correct selection, no reward was given but one of the arrays was manipulated. In some cases, this manipulation involved moving items closer together or farther apart to change the physical arrangement of the array without changing the quantity of items in the array. In other cases, additional items were added to the initially smaller array so that it became quantitatively larger. Monkeys then made another selection from the two rows of items. Monkeys were sensitive to these manipulations, changing their selections when the number of items in the rows changed but not when the arrangement only was changed. Therefore, monkeys responded on the basis of the quantity of items, and they were not distracted by non-quantitative manipulations of the sets.Electronic Supplementary Material Supplementary material is available for this article at     

Augustine's Ethics of Belief and AvoidingViolence in Religious Disputes

This article is a study of how Augustine's ethics of belief shaped his arguments against unbelief and its legacy in using coercion to settle disputes. After considering the arguments for belief presented by Augustine, the article studies how these were shaped by his understanding of the problem of evil and how the Fall influenced free will. What is noted to be of benefit in Augustine is that he offers arguments in favor of belief, and is convinced that he has shown unbelief to be based on unsound reasoning. By way of contrast, a number of theologians (such as Tertullian, John Calvin, and those under the heading of Reformed Epistemology) are considered who do not believe that arguments are necessary to support belief or reject unbelief. These are contrasted with Augustine and it is argued that they have significant shortcomings in this respect. However, the article concludes that Augustine could have gone farther in supporting the claim that it is clear that God exists, and his own shortcomings have been used to justify coercion in religious belief. If common ground is to be achieved this problem must be corrected and an adequate foundation for clarity must be established.     

Does History End with Postmodernism? Toward an Ultramodern Family Therapy*

Although the end of history has often been announced, human thought continues to renew itself, always incorporating, in each of its stages, important aspects of what has come before. In this sense, neither family therapy in general, nor its more particular postmodern orientations, have led to a radical break with the past. Neither can they claim to have reached a comfortable, definitive position. The subjectivist turn that introduced postmodernism into the systemic model has enriched it with important theoretical and practical elements, such as the critique of a therapist's supposed objectivity, circular and reflexive questioning, or the technique of externalization. This article proposes to take the renewal of systemic family therapy farther by addressing still unresolved issues, such as the role of the individual in relational systems, the place of emotions, or the construction of a relational psychopathology. The term "ultramodern family therapy" is proposed until such time as there is agreement upon a better one.     

Capuchin monkeys (Cebus apella) succeed in a test of quantity conservation

Nonhuman animals demonstrate a number of impressive quantitative skills such as counting sets of items, comparing sets on the basis of the number of items or amount of material, and even responding to simple arithmetic manipulations. In this experiment, capuchin monkeys were presented with a computerized task designed to assess conservation of discrete quantity. Monkeys first were trained to select from two horizontal arrays of stimuli the one with the larger number of items. On some trials, after a correct selection there was no feedback but instead an additional manipulation of one of those arrays. In some cases, this manipulation involved moving items closer together or farther apart to change the physical arrangement of the array but not the quantity of items in the array. In other cases, additional items were added to the initially smaller array so that it became quantitatively larger. Monkeys then made a second selection from the two arrays of items. Previous research had shown that rhesus monkeys (Macaca mulatta) succeeded with this task. However, there was no condition in that study in which items were added to the smaller array without increasing its quantity to a point where it became the new larger array. This new condition was added in the present experiment. Capuchin monkeys were sensitive to all of these manipulations, changing their selections when the manipulations changed which array contained the larger number of items but not when the manipulations changed the physical arrangement of items or increased the quantity in one array without also reversing which of the two arrays had more items. Therefore, capuchin monkeys responded on the basis of the quantity of items, and they were not distracted by non-quantitative manipulations of the arrays. The data indicate that capuchins are sensitive to simply arithmetic manipulations that involve addition of items to arrays and also that they can conserve quantity.     

NO ONE IS GUILTY: CRIME, PATRIARCHY, AND INDIVIDUALISM*

Let us begin with a fundamental realization: No amount of thinking and no amount of public policy have brought us any closer to understanding and solving the problem of crime. The more we have reacted to crime, the farther we have removed ourselves from any understanding and any reduction of the problem. In recent years, we have floundered desperately in reformulating the law, punishing the offender, and quantifying our knowledge. Yet this country remains one of the most crime-ridden nations. In spite of all its wealth, economic development, and scientific advances, this country has one of the worst crime records in the world.
With such realization, we return once again—as if starting anew—to the subject of crime, a subject that remains one of our most critical indicators of the state of our personal and collective being. If what is to be said seems outrageous and heretical, it is only because it is necessarily outside the conventional wisdom both of our understanding of the problem and of our attempt to solve it.     

Visual, auditory, and cross-modality dual-task costs: electrophysiological evidence for an amodal bottleneck on working memory consolidation

When two masked, attended targets (T1 and T2) are presented within approximately half a second of each other, report of T2 is poor, compared with when the targets are presented farther apart in time--a phenomenon known as the attentional blink (AB; Raymond, Shapiro, & Arnell, 1992). Some researchers have suggested that an amodal bottleneck on working memory consolidation underlies the AB (see, e.g., Arnell & Jolicoeur, 1999). In the present work, T1 was masked, whereas T2 was unmasked. The modality of T1 (visual or auditory) and the modality of T2 (visual or auditory) were factorially manipulated across four experiments. For all modality combinations, T2's P3 event-related brain potential component was found to be delayed when T2 was presented soon after T1 (lag 3), compared with when T1 and T2 were presented farther apart (lag 8). Results suggest that the working memory consolidation bottleneck is amodal in nature, and provide evidence that visual, auditory, and cross-modality ABs all result from a bottleneck on consolidation operations.     

From Here to Eternity Children's Acquisition of Understanding of Projective Size on Television

This study attempts to trace children's acquisition of understanding of projective size (e.g., getting closer to and farther away from an object) as depicted on television through two distinctive techniques—zooming in/out and multiple edits. Unlike previous research in this area, this investigation applied aspects of cognitive processing that have been identified as untapped through gross Piagetian measures—Level 1 and Level 2 knowledge of visual perception (Pillow & Flavell, 1986). Findings suggest that children classified as “preoperational” by Piagetian standards, but possessing Level 1 knowledge of visual perception—the ability to infer what objects can or cannot be seen from another person's viewpoint—are capable of understanding the more simple form of projective size; children possessing Level 2 knowledge—the ability to infer the nature, as well as the content, of another person's visual experience—have a better comprehension of the more complex, edited presentation of projective size. Level of television consumption plays a role in children's acquisition of understanding of television information.     

All our troubles seem so far away: temporal pattern to accessible alternatives and retrospective team appraisals

Three studies tested the hypothesis that thoughts about alternatives become increasingly accessible over time, leading poor outcomes to feel subjectively farther away and less inevitable. This subjective temporal distance bias was obtained even though actual time since poor and good outcomes was identical. In Study 1, participants who recalled distant poor team outcomes thought of alternatives easily and outcomes felt farther away and less inevitable. Thoughts about outcomes were most easily accessible after good outcomes, which felt closer and more inevitable. In Study 2, with measures obtained immediately or at a later time on a negotiation task, changes over time occurred primarily for poor team outcomes. In Study 3, team performance on an investment task indicated it is whether alternatives are thought of easily, not thought content, that produces this effect. Discussion centers on temporal appraisals, other temporal biases, and teams.