Optic variables used to judge future ball arrival position in expert and novice soccer players

Although many studies have looked at the perceptual—cognitive strategies used to make anticipatory judgments in sport, few have examined the informational invariants that our visual system may be attuned to. Using immersive interactive virtual reality to simulate the aerodynamics of the trajectory of a ball with and without sidespin, the present study examined the ability of expert and novice soccer players to make judgments about the ball’s future arrival position. An analysis of their judgment responses showed how participants were strongly influenced by the ball’s trajectory. The changes in trajectory caused by sidespin led to erroneous predictions about the ball’s future arrival position. An analysis of potential informational variables that could explain these results points to the use of a first-order compound variable combining optical expansion and optical displacement.     

性别-学科刻板印象的加工模式实验研究

性别刻板印象是在继种族刻板印象之后,逐渐受到研究者们关注的热点问题。本文运用内隐联想测量法来探讨大学生性别一学科刻板印象的加工模式,采用3×2×2的三因素完全随机设计进行实验研究。结果表明：内隐和外显的性别-学科刻板印象出现了实验分离现象。三个不同的内隐测量组的被试均不同程度认为男女性在学习文科时能力相当,学习理科方面则男性明显优于女性。但在外显测试中被试们却认为两者在学习文理科时无差异。结论：内隐性别一学科刻板印象更倾向于一种自动化加工,采用的是“自上而下”的省时省力加工模式。而外显性别一学科刻板印象趋向于自动加工与控制加工相结合,是一种“自下而上”、“三思而答”的加工模式。     

A neural network approach to identifying adolescent adjustment.

This study examined the relationship between the quality of adjustment in adolescents and a set of psychiatric diagnoses, personality traits, parental bonding, and social support variables. One hundred fifty adolescents were administered the Millon Adolescent Personality Inventory, the Parental Bonding Questionnaire, the Social Support Questionnaire, and the Diagnostic Interview for Children and Adolescents. A neural network approach was then utilized, and it was found that several of the variables (e.g., Major Depressive Disorder, Conduct Disorder, and Societal Conformity) had a significant role in classifying adolescents into three groups: maladjusted, nominally adjusted, and well-adjusted.     

Deictic codes for the embodiment of cognition

To describe phenomena that occur at different time scales, computational models of the brain must incorporate different levels of abstraction. At time scales of approximately 1/3 of a second, orienting movements of the body play a crucial role in cognition and form a useful computational level--more abstract than that used to capture natural phenomena but less abstract than what is traditionally used to study high-level cognitive processes such as reasoning. At this "embodiment level," the constraints of the physical system determine the nature of cognitive operations. The key synergy is that at time scales of about 1/3 of a second, the natural sequentiality of body movements can be matched to the natural computational economies of sequential decision systems through a system of implicit reference called deictic in which pointing movements are used to bind objects in the world to cognitive programs. This target article focuses on how deictic binding make it possible to perform natural tasks. Deictic computation provides a mechanism for representing the essential features that link external sensory data with internal cognitive programs and motor actions. One of the central features of cognition, working memory, can be related to moment-by-moment dispositions of body features such as eye movements and hand movements.     

Null effects of exposure duration and heterogeneity of difference on thesame-different disparity in letter matching

The rechecking and external-noise postulates of Krueger’s (1978) noisy-operator theory were examined in three letter-matching experiments. Rechecking was tested by varying exposure duration, both without (Experiment 1) and with (Experiment 2) a subsequent noise mask. Predictions of a decreasedsame-different reaction time disparity and an increase in falsedifferent errors at brief exposures were not borne out. The external-noise postulate was tested by varying the degree of heterogeneity of difference between letter sets. The prediction of a smallersamedifferent reaction time disparity for the more heterogeneous letter set was not obtained. Thus, the results did not support internal noise as the basis of thesame-different disparity, but were more consistent with response-inhibition accounts.     

Estimation and tests of significance in factor analysis

A distinction is drawn between the method of principal components developed by Hotelling and the common factor analysis discussed in psychological literature both from the point of view of stochastic models involved and problems of statistical inference. The appropriate statistical techniques are briefly reviewed in the first case and detailed in the second. A new method of analysis called the canonical factor analysis, explaining the correlations between rather than the variances of the measurements, is developed. This analysis furnishes one out of a number of possible solutions to the maximum likelihood equations of Lawley. It admits an iterative procedure for estimating the factor loadings and also for constructing the likelihood criterion useful in testing a specified hypothesis on the number of factors and in determining a lower confidence limit to the number of factors.     

Mahatma Gandhi’s Pragmatic Spirituality: Its Relevance to Psychology East and West

M. K. Gandhi is no academic psychologist; but his philosophy and practice of pragmatic spirituality have important implications for psychology in general and Indian psychology in particular. Psychology as taught and practised in India is mostly Western and not Indian psychology. Indian psychology is an emerging system of psychology with its roots in classical Indian thought. According to Gandhi, the person is instinctively brute, but inherently spiritual. Consequently, he/she has on the one hand natural attraction to sensory gratification and indulgence, selfish desires and craving. On the other hand, he or she aspires for self-realization. Human development is a dialectical process where people seek to find a workable synthesis between sensory indulgence and spiritual aspirations, between egotistic selfishness and altruistic urges. Gandhi’s life provides an excellent case study of the ways of spiritual development. The techniques he crafted like satyagraha and the strategies he followed in his public life give us insights into how spirituality can be applied to improve human condition. The applications are not India specific, but universal. Therefore, psychologists from the East as well as from the West can join in exploring Gandhian ideas and techniques of psycho-spiritual development and their relevance to today’s troubled world.     

Using perfusion fMRI to measure continuous changes in neural activity with learning

In this study, we examine the suitability of a relatively new imaging technique, arterial spin labeled perfusion imaging, for the study of continuous, gradual changes in neural activity. Unlike BOLD imaging, the perfusion signal is stable over long time-scales, allowing for accurate assessment of continuous performance. In addition, perfusion fMRI provides an absolute measure of blood flow so signal changes can be interpreted without reference to a baseline. The task we used was the serial response time task, a sequence learning task. Our results show reliable correlations between performance improvements and decreases in blood flow in premotor cortex and the inferior parietal lobe, supporting the model that learning procedures that increase efficiency of processing will be reflected in lower metabolic needs in tissues that support such processes. More generally, our results show that perfusion fMRI may be applied to the study of mental operations that produce gradual changes in neural activity.