Type T personality and the Jungian classification system

The Type T personality has been described as a personality dimension referring to individual differences in stimulation seeking, excitement seeking, thrill seeking, arousal seeking, and risk taking. This article explores its relationship to the theoretically relevant personality classification system of C.G. Jung, employing the Myers-Briggs Type Indicator as a measure of Jungian types. A sample of high-school students was administered the Myers-Briggs and a measure of Type T. Pearson correlations revealed Type T to be significantly related to the Jungian Intuitive and Perceptive types, with the Type T personality being described as intuitive and perceptive. Interpretations of these exploratory findings were offered.     

From the heart

Abstract

Rollo May and the author constructed an alternative psychology licensing exam putting more focus on the humanities and their relevance for psychology. Colleagues are invited to take the exam, and if they fail, to turn in their licenses.     

Does monocular visual space contain planes?

The issue of the existence of planes—understood as the carriers of a nexus of straight lines—in the monocular visual space of a stationary human observer has never been addressed. The most recent empirical data apply to binocular visual space and date from the 1960s (Foley, 1964). This appears to be both the first and the last time this basic issue was addressed empirically. Yet the question is of considerable conceptual interest. Here we report on a direct empirical test of the existence of planes in monocular visual space for a group of sixteen experienced observers. For the majority of these observers monocular visual space lacks a projective structure, albeit in qualitatively different ways. This greatly reduces the set of viable geometrical models. For example, it rules out all the classical homogeneous spaces (the Cayley-Klein geometries) such as the familiar Luneburg model. The qualitatively different behavior of experienced observers implies that the generic population might well be inhomogeneous with respect to the structure of visual space.     

Medial temporal lobe memory in childhood: developmental transitions

The medial temporal lobes (MTL) support declarative memory and mature structurally and functionally during the postnatal years in humans. Although recent work has addressed the development of declarative memory in early childhood, less is known about continued development beyond this period of time. The purpose of this investigation was to explore MTL‐dependent memory across middle childhood. Children (6 –10 years old) and adults completed two computerized tasks, place learning (PL) and transitive inference (TI), that each examined relational memory, as well as the flexible use of relational learning. Findings suggest that the development of relational memory precedes the development of the ability to use relational knowledge flexibly in novel situations. Implications for the development of underlying brain areas and ideas for future neuroimaging investigations are discussed.     

Aging preserves the ability to perceive 3D object shape from static but not deforming boundary contours

A single experiment investigated how younger (aged 18-32 years) and older (aged 62-82 years) observers perceive 3D object shape from deforming and static boundary contours. On any given trial, observers were shown two smoothly-curved objects, similar to water-smoothed granite rocks, and were required to judge whether they possessed the "same" or "different" shape. The objects presented during the "different" trials produced differently-shaped boundary contours. The objects presented during the "same" trials also produced different boundary contours, because one of the objects was always rotated in depth relative to the other by 5, 25, or 45 degrees. Each observer participated in 12 experimental conditions formed by the combination of 2 motion types (deforming vs. static boundary contours), 2 surface types (objects depicted as silhouettes or with texture and Lambertian shading), and 3 angular offsets (5, 25, and 45 degrees). When there was no motion (static silhouettes or stationary objects presented with shading and texture), the older observers performed as well as the younger observers. In the moving object conditions with shading and texture, the older observers' performance was facilitated by the motion, but the amount of this facilitation was reduced relative to that exhibited by the younger observers. In contrast, the older observers obtained no benefit in performance at all from the deforming (i.e., moving) silhouettes. The reduced ability of older observers to perceive 3D shape from motion is probably due to a low-level deterioration in the ability to detect and discriminate motion itself.     

Poor shape perception is the reason reaches-to-grasp are visually guided online

Both judgment studies and studies of feedforward reaching have shown that the visual perception of object distance, size, and shape are inaccurate. However, feedback has been shown to calibrate feedfoward reaches-to-grasp to make them accurate with respect to object distance and size. We now investigate whether shape perception (in particular, the aspect ratio of object depth to width) can be calibrated in the context of reaches-to-grasp. We used cylindrical objects with elliptical cross-sections of varying eccentricity. Our participants reached to grasp the width or the depth of these objects with the index finger and thumb. The maximum grasp aperture and the terminal grasp aperture were used to evaluate perception. Both occur before the hand has contacted an object. In Experiments 1 and 2, we investigated whether perceived shape is recalibrated by distorted haptic feedback. Although somewhat equivocal, the results suggest that it is not. In Experiment 3, we tested the accuracy of feedforward grasping with respect to shape with haptic feedback to allow calibration. Grasping was inaccurate in ways comparable to findings in shape perception judgment studies. In Experiment 4, we hypothesized that online guidance is needed for accurate grasping. Participants reached to grasp either with or without vision of the hand. The result was that the former was accurate, whereas the latter was not. We conclude that shape perception is not calibrated by feedback from reaches-to-grasp and that online visual guidance is required for accurate grasping because shape perception is poor.     

The role of explicit and implicit standards in visual speed discrimination

Five experiments were designed to investigate visual speed discrimination. Variations of the method of constant stimuli were used to obtain speed discrimination thresholds in experiments 1, 2, 4, and 5, while the method of single stimuli was used in experiment 3. The observers' thresholds were significantly influenced by the choice of psychophysical method and by changes in the standard speed. The observers' judgments were unaffected, however, by changes in the magnitude of random variations in stimulus duration, reinforcing the conclusions of Lappin et al (1975 Journal of Experimental Psychology: Human Perception and Performance 1 383 394). When an implicit standard was used, the observers produced relatively low discrimination thresholds (7.0% of the standard speed), verifying the results of McKee (1981 Vision Research 21 491-500). When an explicit standard was used in a 2AFC variant of the method of constant stimuli, however, the observers' discrimination thresholds increased by 74% (to 12.2%), resembling the high thresholds obtained by Mandriota et al (1962 Science 138 437-438). A subsequent signal-detection analysis revealed that the observers' actual sensitivities to differences in speed were in fact equivalent for both psychophysical methods. The formation of an implicit standard in the method of single stimuli allows human observers to make judgments of speed that are as precise as those obtained when explicit standards are available.     

Improvisation as a Meta-Counseling Skill

Counselor education tends to see the development of basic counseling and communication skills as the foundation of clinical training. Improvisation has historically and primarily been connected to theater training and as a performance mechanism. By developing skills in spontaneity and the nature of narrative (or story) one becomes more able to be in-the-moment with a client or clients and thus less anxious and more able to meet the client where they are. As such, improvisation can really be seen as a meta-counseling skill—a skill that can form a firmer foundation for the learning of the basic counseling and communication micro-skills. This article outlines the core concepts of improvisational training for counselors and includes examples of improvisational games that can specifically help in preparing counselor trainees for their future clinical work.     

Four Pedagogical Mistakes: A Mea Culpa

Abstract. The theological pedagogies which dominate degree‐granting schools originated in the courses of study and graduate programs of the teachers. These pedagogies foster a deep rift between theology as an academic or scholarly discipline (science?) and the situations and interests of students. Students are taught to imitate what scholars do: interpreting texts, making formal arguments, and writing essays. Accordingly, theology recedes from the present and future of students including future clergy, having little to do with their religious life or career. By defining theology as scholarship, academic pedagogy obscures its primary meaning, the critical and creative thinking of the situations of life and world under the perspective of the Gospel. If theology's primary meaning is scholarly knowledge and its preoccupation with text interpretation and doctrinal exposition, the result will be to ignore religion's actual practices, especially its idolatrous tendency to literalize its own language and absolutize its institutional mediations. A pedagogy that reflects theology's primary meaning will focus on contemplation, reflection, and thinking and thus order methods, texts, and doctrines to that.