How Reliably Do Eye Parameters Indicate Internal Versus External Attentional Focus?

Eye behavior is increasingly used as an indicator of internal versus external focus of attention both in research and application. However, available findings are partly inconsistent, which might be attributed to the different nature of the employed types of internal and external cognition tasks. The present study, therefore, investigated how consistently different eye parameters respond to internal versus external attentional focus across three task modalities: numerical, verbal, and visuo-spatial. Three eye parameters robustly differentiated between internal and external attentional focus across all tasks. Blinks, pupil diameter variance, and fixation disparity variance were consistently increased during internally directed attention. We also observed substantial attentional focus effects on other parameters (pupil diameter, fixation disparity, saccades, and microsaccades), but they were moderated by task type. Single-trial analysis of our data using machine learning techniques further confirmed our results: Classifying the focus of attention by means of eye tracking works well across participants, but generalizing across tasks proves to be challenging. Based on the effects of task type on eye parameters, we discuss what eye parameters are best suited as indicators of internal versus external attentional focus in different settings.     

Do we need visual subjects?

It is widely accepted within contemporary philosophy of perception that the content of visual states cannot be characterized simply as a list of represented features. This is because such characterization leads to the so-called ‘Many Properties’ problem, that is, it does not allow us to explain how the visual system is able to distinguish between scenes containing different arrangements of the same features. The usual solution to the Many Properties problem is to characterize some basic elements of content as subjects, to which features are attributed by a predication-like relation. In this paper, I reconsider this solution and claim that the Many Properties problem can be solved without postulating such subjects. What is more, I argue that an alternative approach has stronger justification given the empirical data concerning human vision.     

There is a 60% probability,but I am 70% certain: communicative consequences of external and internal expressions of uncertainty

Current theories of probability recognise a distinction between external (un)certainty (frequentistic probabilities) and internal (un)certainty (degrees of belief). The present studies investigated this distinction in lay people's judgements of probability statements formulated to suggest either an internal (“I am X% certain”) or an external (“It is X% certain” or “There is an X% probability”) interpretation. These subtle differences in wording influenced participants' perceptions and endorsements of such statements, and their impressions of the speaker. External expressions were seen to signal more reliable task duration estimates, and a lower degree of external than internal certainty was deemed necessary to advise a course of action. In conversations about football, internal expressions were perceived as signalling more personal interest, and were expected to be on the average 10% higher than corresponding external probabilities. Finally, people who reported their outcome expectations for two major sports events let their degree of interest in these events influence their internal but not their external certainty. These results have implications for the communication of uncertainty and probability.     

Maternal responsiveness and search for hidden objects and contingency learning by infants

The relationship between maternal responsiveness and infant cognition was examined during two activities: the search for hidden objects and the learning of a contingency rule. Thirty-four mother–infant dyads were observed in a laboratory setting when the infants were 11 months old. The experimental session included three phases: a search for hidden objects (Piagetian tasks), the learning of a contingency rule on a touch screen, and a mother–infant play session using a standardised toy. The results indicated a link between performances in the search and contingency tasks. Moreover, infants who succeeded in both tasks had mothers who displayed higher responsiveness score. The findings are discussed in terms of the infant's detection of relevant stimulus information. © 1998 John Wiley & Sons, Ltd.     

《周易》与《黄帝内经》

中医学理论体系的形成,与中国古代哲学有密切的联系。尤其是《周易》的自然哲学对中医学理论的奠基之作《黄帝内经》影响巨大,自古即有医易同源之说。《周易》对《内经》之影响是多方面的,本文仅选择阴阳、变易、时位中、象数,来探讨二者之间的关系。阴阳导源于《周易》,《内经》在医学方面作了发展;《内经》对变易运动、时位中概念的吸收,使中医学呈现出有别于西医学的民族特色;象数是中医学建立理论体系的方法。     

基于秘密分享的学前儿童对友谊关系的推断

秘密是隐藏在内心深处的东西,人们通常会与亲密的人分享和披露秘密。因此,追踪人们知道彼此的秘密可以作为社会关系的线索。本研究开展两个实验探究秘密分享对学前儿童推断友谊关系的影响。105名和60名幼儿分别参与实验1、实验2。实验1发现5岁以下的儿童大多数认为主角分享物质资源(玩具)的对象是主角的朋友,5～6岁的儿童大多数认为主角分享秘密的对象是主角的朋友,选择被分享秘密的人是分享者更可能的朋友的人数随着年龄的增长而增长; 实验2发现与分享积极的秘密信息和物质资源相比,大部分5～6岁的儿童更倾向于认为分享消极的秘密信息的双方存在友谊关系。研究结果说明至少5～6岁的儿童理解分享秘密的社会意义,并且5～6岁儿童把分享消极的秘密作为友谊关系更有力的标志。     

Demands and capacities versus demands and performance

This article examines the proposed relabeling of “capacities” as “performance” in the Demands and Capacities Model of stuttering in terms of four issues involving the model's demands component, theoretical versatility, genetic potential, and current clinical uses. Although the proposed changes should resolve the measurement issues of concern, it is suggested that this change may not be of sufficient value or significance for a Demands and Performance Model to supplant the Demands and Capacities Model.     

The evolution of cognition—a hypothesis

Behavior may be controlled by reactive systems. In a reactive system the motor output is exclusively driven by actual sensory input. An alternative solution to control behavior is given by “cognitive” systems capable of planning ahead. To this end the system has to be equipped with some kind of internal world model. A sensible basis of an internal world model might be a model of the system's own body. I show that a reactive system with the ability to control a body of complex geometry requires only a slight reorganization to form a cognitive system. This implies that the assumption that the evolution of cognitive properties requires the introduction of new, additional modules, namely internal world models, is not justified. Rather, these modules may already have existed before the system obtained cognitive properties. Furthermore, I discuss whether the occurrence of such world models may lead to systems having internal perspective.     

《黄帝内经》的历史评价与读法

《黄帝内经》仅代表当时医学理论水平,它是以自然哲学的思维来解释自然科学问题的理论假说,虽然发现了许多客观的规律与结论,也有不少错误的猜测.因此,读《黄帝内经》要注意三点:一是书中概念多,但定义少,需要辩证体会；二是要以实践来验证其理论的真与伪；三是书中有些概念的含义与现代不同,要区别对待.     

Clinical theory at the border(s): Emerging and unintended crossings in the development of clinical theory

The author provides some scaffolding for thinking about emerging and unintended integrative developments in clinical theory. The emergent theory to which the author refers works at a different level of theoretical discourse than explicit attempts at comparative translation of psychoanalytic concepts or theories. In contrast, most of the theory that is explored in this paper involves clinical discourse aimed at solving important common clinical problems. The work of a group of authors (Jay Greenberg, John Steiner, Anton Kris, Michael Feldman and Charles Spezzano) is described as simultaneously embedded within a particular orientation while demonstrating a kind of unwitting reach to a broad swathe of analysts. Distinctions are made between this kind of linking of clinical theory versus self‐consciously syncretic and integrative approaches to theory development. The author also discusses the educational implications of this emergent theory for teaching and learning during psychoanalytic training.