Stereokinetic effect and its relation to the kinetic depth effect.

The stereokinetic effect (SKE) has been defined and studied by nested circular patterns rotating on a turntable. Circles must appear not to rotate as they revolve, which in turn results in their appearing to translate relative to one another. A powerful illusion of object depth results even though the individual circles do not undergo an appropriate foreshortening consistent with their apparent changes in slant. It is suggested and tested that the SKE is based on the changing positions between the nested contours despite the absence of any change within each contour, whereas the kinetic depth effect (KDE) entails both kinds of change. It follows that a turntable method of presentation is not necessary, and between-contour transformations can be simulated by computer animation. Displays consisting of simple translations were shown to evoke robust depth impressions as were patterns consisting of contours of varying shapes. Comparisons of the depth, compellingness, and rigidity of matched SKE and KDE displays are reported. The SKE is taken to be paradigmatic for how the visual system perceives depth when observing small object rotations that occur in everyday situations.     

A meta-analytic investigation of the relationship of state and trait anxiety to performance on figural and verbal creative tasks

Extensive research suggests when and how anxiety has debilitating or facilitating effects on routine cognitive tasks or motor tasks. However, research examining anxiety's relation to performance on creative tasks such as divergent thinking and artistic tasks is less conclusive despite a rather substantial literature. The authors' meta-analytic investigation of 59 independent samples finds that anxiety is significantly and negatively related to creative performance. In addition, the findings provide insights into factors such as task complexity, type of task (i.e., figural or verbal), and type of anxiety (i.e., state or trait) that moderate the relationship between anxiety and creativity-all of which are consistent with the idea that anxiety and creativity present competing cognitive demands. In addition to identifying gaps in the literature such as the need for research using a two-component model of anxiety in relation to creativity, the authors' results have practical implications for those seeking to increase individual creativity.     

The effect of figural manipulations on brightness differences in the Benary cross

The Benary cross is a classical demonstration showing that the perceived brightness f an area is not solely determined by its luminance, but also by the context in which it is embedded. Despite the fact that two identical grey triangles are flanked by an equal amount of black and white, one of the triangles is perceived as being lighter than the other. It has been argued that the junctions surrounding a test area are crucial in determining brightness. Here, we explored how different aspects influencing perceptual organisation influence perceived figure-background relations in the Benary cross and, with that, the perceived brightness of the triangular patches in our stimuli. The results of a cancellation task confirm that the alignment of contours at junctions indeed has a strong influence on an area's brightness. At the same time, however, the Benary effect is also influenced by the overall symmetry of the cross and its orientation.     

Adaptation and repulsion in the figural after-effect

An experiment is reported which shows the effect of inspection of a curved line on the apparent curvature of a curved test line for a range of curvatures of both I and T lines. A second experiment extends the range of I curvatures, using only one T line, a straight line. The experiments showed both adaptation and repulsion components in the FAE.

An experiment by Kohler and Wallach which could not be reconciled with these results was repeated in the relevant part; the results were in agreement with the first experiment here and did not agree with those obtained by Kohler and Wallach.

An argument is presented that both adaptation and repulsion effects could be produced by a cell adaptation mechanism.     

Infant sensitivity to figural coherence in biomechanical motions

Two experiments assessed infant sensitivity to figural coherence in point-light displays moving as if attached to the major joints of a walking person. Experiment 1 tested whether 3- and 5-month-old infants could discriminate between upright and inverted versions of the walker in both moving and static displays. Using an infant-control habituation paradigm, it was found that both ages discriminated the moving but not the static displays. Experiment 2 was designed to clarify whether or not structural invariants were extracted from these displays. The results revealed that (1) moving point-light displays with equivalent motions but different topographic relations were discriminated while (2) static versions were not, and (3) arrays that varied in the amount of motion present in different portions of the display were also not discriminated. These results are interpreted as indicating that young infants are sensitive to figural coherence in displays of biomechanical motion.     

How to study the kinetic depth effect experimentally

Sperling, Landy, Dosher, and Perkins (1989) proposed an objective 3D shape identification task with 2D artifactual cues removed and with full feedback (FB) to the subjects to measure KDE and to circumvent algorithmically equivalent KDE-alternative computations and artifactual non-KDE processing. (1) The 2D velocity flow-field was necessary and sufficient for true KDE. (2) Only the first-order (Fourier-based) perceptual motion system could solve our task because the second-order (rectifying) system could not simultaneously process more than two locations. (3) To ensure first-order motion processing, KDE tasks must require simultaneous processing at more than two locations. (4) Practice with FB is essential to measure ultimate capacity (aptitude) and, thereby, to enable comparisons with ideal observers. Experiments without FB measure ecological achievement--the ability of subjects to extrapolate their past experience to the current stimuli.     

Conflict behaviors and their relationship to popularity

This study examined conflict behaviors (self, other) among 127 Turkish college students. Differences in five conflict behaviors (forcing, avoiding, accommodating, compromising, and collaborating) were then explored in relation to popularity and unpopularity. Results indicated that the students engaged in more avoiding and compromising behaviors, while perceiving more forcing behavior in others. Further, the unpopular group was found to engage in more compromising behavior, and perceived more forcing behavior in others, as compared with the popular group. Constructive and destructive conflict strategies, and their implications for popularity, are discussed.     

Counter displacement in the visual figural after-effect

In this study an attempt is made to specify the conditions under which counter displacement (test contour displaced toward the inspection contour) will occur. Three experiments are described in which different lengths of inspection of the test-(T-) figure are given following short and long inspections of the inspection-(I-) figure. In Experiment I, after partial dissipation of the figural after-effect (FAE), a period of continuous inspection of the T-figure was employed. In Experiments II and III distributed inspection of the T-figure was given by increasing the number of measurements of the FAE. In all experiments counter displacement was evident. The results were consistent with an interpretation of counter displacement offered earlier by the authors.     

Application of the sensory-tonic theory of perception to figural after-effect

Current theoretical positions concerned with figural after-effects were criticized for their inadequacy in accounting for figural after-effects data and for their failure to link these phenomena with other perceptual phenomena in any systematic fashion. On the basis of the relative broadness of Gibson's early formulation, it was decided to adapt a similar adaptation theory, the sensory-tonic field theory of perception, to figural after-effect displacements. Appropriate hypotheses were stated and predictions made. These were tested and confirmed. It was concluded that although the success of the theory is limited, there appears to be hope for its extension.     

Entitativity and prejudice: Examining their relationship and the moderating effect of attitude certainty

Previous research suggests that perceived entitativity, which represents the degree to which groups are perceived to possess unity, coherence, and organization, predicts intergroup stereotyping and bias. The present research yielded complementary evidence that prejudice (toward Muslims in Study 1 and toward South Asians in Study 2) can also predict groups’ perceived entitativity. In particular, Study 1 found that the relationships of two predictors, intergroup contact and social dominance orientation, with perceived entitativity were mediated by prejudice. Study 2 demonstrated, as predicted, that this set of relationships occurred primarily for intergroup attitudes of relatively high certainty. Neither study found support for models in which entitativity mediated the relationships of the predictors with prejudice. Conceptual and analytical factors that may account for evidence of the potential bi-directionality of the bias-entitativity relationship are considered.     

The morinaga misalignment effect: Reduction and reversal by modification of figural extremities

Summary In three experiments straight lines varying in length were added to the physically aligned apexes of asymmetrically arranged angles (Experiment 1) and the ends of similarly arranged parallel lines (Experiments 2 and 3). Compared with the condition without added lines, apparent misalignment of the aligned apexes (Morinaga effect) was markedly reduced by the shorter lines and reversed in direction by the longer ones. Apparent misalignment of the ends of parallels was also reduced but not reversed by collinear and right-angle lines. Reduction was greater with the longer collinear lines and with right-angle lines that crossed the parallels a short distance from their ends. These outcomes are interpreted as implicating processes associated with the extremities of figural elements (apexes, ends, and edges) rather than the configuration formed by the elements.     

Contrast effects and their relationship to subsequent behavior

The present study attempted to apply social judgment theories to the effects of context on judgments of the importance of a social issue and on subsequent issue-related behavior. Subjects judged the importance of a target issue (recycling) in the context of either important or unimportant social issues and were subsequently asked in a separate setting for help on a local recycling project. Context produced contrast effects on rating scale judgments of the importance of recycling. These judgments, if salient, were then used as a basis for subsequent support of the recycling project. When either the initial judgment was not salient or no prior judgment of recycling was made, the importance of the context had a positive effect on amount of support for recycling, such that more help was given in the important context conditions. Results indicate that contrast effects on the ratings are response base rather than perceptual in nature, but that the rating, if salient, can serve as subsequent behavior and attitudes.     

Adolescents' problems and their relationship to self-esteem.

The Mooney Problem Check List and Rosenberg's Self-Esteem Scale were administered to 201 adolescents, ages 14 to 16 years. Sex differences in the number and nature of problems reported, and their relationship to self-esteem, were examined. Results indicated that, overall, girls reported significantly more problems and lower levels of self-esteem than did boys. Girls had more problems with interpersonal relationships, personal adjustment, health, and family issues. There were no significant differences between girls and boys in the areas of educational and vocational future. Surprisingly, neither boys nor girls were particularly concerned about their vocational/educational future. Relative to other areas, adjustment to schoolwork was identified as being of considerable concern for both sexes. There was a significant relationship between self-esteem and reported problems, and different problem areas were related to self-esteem for girls and boys. The findings of this study support previous research and provide further information concerning relationships between self-esteem and problems.