How brain arousal systems determine different temperament types and the major dimensions of personality

Theory and research is described which led to the hypothesis that the choleric (E+N+) and melancholic (E−N+) temperaments are determined by differences in thalamocortical inhibition of brain-stem processes. An opportunity to test this hypothesis was provided by the recent discovery of 4, 7, and 10 Hz response waves confounded in EEG averaged evoked potentials [Robinson, D. L. (1999b). The technical, neurological, and psychological significance of ‘alpha’ ‘theta’ and ‘delta’ waves confounded in EEG evoked potentials: 1. A study of peak latencies. Electroencephalography and Clinical Neurophysiology, 110, 1427–1434; (2000). The technical neurological, and psychological significance of ‘alpha’, ‘delta’, and ‘theta’ waves confounded in EEG evoked potentials: A study of peak amplitudes. Personality and Individual Differences, 28, 673–693]. These responses are attributed to the brain-stem, limbic, and thalamocortical arousal systems, respectively, and in the cited reports principal components analysis of data obtained from 93 participants confirmed the existence of predicted excitatory and inhibitory relationships. ANOVA was used in the present study to test the further prediction that there should be strong inhibition of the 4 Hz system by the 10 Hz system in melancholics (E−N+) and weak inhibition of the 4 Hz system in cholerics (E+N+), with median inhibition predicted for the other temperament types. There was a large and statistically significant difference between the mean scores on the PCA inhibition factor obtained for the temperament groups, with temperament defined in terms of high and low EPQ extraversion (E) and neuroticism (N) scores. The significance of these results is discussed with reference to fundamental questions raised by Pavlov's pioneering research but left unanswered for the best part of a century. Implications for the future conduct of personality research are also considered.     

The psychophysics of chasing: A case study in the perception of animacy

Psychologists have long been captivated by the perception of animacy – the fact that even simple moving shapes may appear to engage in animate, intentional, and goal-directed movements. Here we report several new types of studies of a particularly salient form of perceived animacy: chasing, in which one shape (the ‘wolf’) pursues another shape (‘the sheep’). We first demonstrate two new cues to perceived chasing – chasing subtlety (the degree to which the wolf deviates from perfectly ‘heat-seeking’ pursuit) and directionality (whether and how the shapes ‘face’ each other). We then use these cues to show how it is possible to assess the objective accuracy of such percepts, and to distinguish the immediate perception of chasing from those more subtle (but nevertheless real) types of ‘stalking’ that cannot be readily perceived. We also report several methodological advances. Previous studies of the perception of animacy have faced two major challenges: (a) it is difficult to measure perceived animacy with quantitative precision; and (b) task demands make it difficult to distinguish perception from higher-level inferences about animacy. We show how these challenges can be met, at least in our case study of perceived chasing, via tasks based on dynamic visual search (the Find-the-Chase task) and a new type of interactive display (the Don’t-Get-Caught! task).     

Schizotypy and hemisphere function—II : Performance asymmetry on a verbal divided visual-field task

Following reports that psychotic patients show abnormal performance asymmetries on divided visual-field (DVF) tasks, a study was made of the relationship between performance asymmetries on a verbal DVF task in a group of normal Ss (18 male, 18 female) and self-report measures of personality. Interest was focused primarily on a new questionnaire, the STQ, which purports to provide measures of both ‘schizotypal’ and ‘borderline’ personality. It was hypothesized that high scoring on the ‘schizotypal’ scale would be associated with attenuation of performance asymmetry on the DVF task. The hypothesized correlation was found for males but not for females. The results are discussed in the context of theoretical issues central to the DVF method and are taken generally to support a continuity model of psychosis.     

Schizotypy and hemisphere function—I : Theoretical considerations and the measurement of schizotypy

This paper brings together, in the context of individual-differences theory, two developing themes in schizophrenia research. One concerns the manifestation, in normal people, of ‘psychotic’ characteristics and their measurement using scales which, unlike the Eysenck P scale, draw their items from the clinical symptomatology of psychosis. Recent work on the so-called ‘borderline states’ is considered especially relevant and a new two-scale questionnaire (STQ) is described which was modelled on the current distinction, in DSM-III, between ‘schizotypal personality disorder’ and ‘borderline personality disorder’. The second theme addressed concerns the possible biological basis of individual differences in ‘schizotypy’. It is argued, in the light of some emerging views about the nature of schizophrenia, that this may lie in the functional and structural properties of hemisphere organization. A suggested strategy for evaluating this theory is an examination of the performance of schizotypal normal Ss on tests of hemisphere function.     

Intelligence, reaction time (RT) and a new ‘odd-man-out’ RT paradigm

A sample of adult Ss of reasonably normal intelligence were given an ‘IQ’ test, a series of RT tests using 0, 1, 2, 3 bits of information in a Hick paradigm and an RT task requiring choice of 1 of 3 lights as an ‘odd-man-out’ on the basis of its relative position. Negative correlations were found between both RT and measures of variation in RT and ‘IQ’ for both of the two tasks. Recent results showing no correlation between Hick slope and ‘IQ’ and no increase in correlation between ‘IQ’ and RT with increasing number of bits, are confirmed. An explanation for findings of Ss whose RT data do not conform to Hick's law is tested and found inadequate. The ‘odd-man-out’ task is found to show an effect of ‘learning’ across the period of the task, the size of the learning effect was found also to correlate with ‘IQ’, but no evidence for learning was found with the choice RT task.     

Lifestyle traits as predictors of driving behaviour in urban areas of Greece

The aim of this study was to examine possible links between different lifestyle patterns and aberrant driver’s behaviour. Personal interviews were conducted in a representative sample of 324 adults (18–65), all residents of Crete. Aberrant driver’s behaviour was assessed by the ‘driver behaviour questionnaire’ (DBQ). Also to measure different dimensions of lifestyle, first, a 26-items questionnaire was used, and second, three questions measuring ‘driving without destination’, related in previous findings with road accident risk. Four lifestyle patterns: ‘religion/tradition’, ‘driving aimlessly’, ‘sports’ and ‘culture’ are significant predictors of ordinary violations. ‘Driving without destination’ has a significant effect all three DBQ factors (b positive). ‘Religion/tradition’ was related only to ordinary violations (b negative) and ‘sports’ has a positive impact on ordinary violations and a negative impact on ‘errors’. Two lifestyle factors are related to more dangerous driving: ‘Driving without destination’ and/or pursuing a more ‘athletic way of living’. Road safety campaigns must teach the first group to use other hobbies and activities to vent their feelings and the second, not to overestimate their abilities, while driving.     

Religion in the service of an elite: A sociologicallydefined imposture. the case of ancient Sparta

The following article is based upon the socio-theological framework elaborated in mybook, Heilsgeschidllicht verfasste Theologie and Männerbiinde, (Theology based on the History of Salvation versus ‘Märmerbünde‘). It attempts to correlate the recurring appearance of a gnostic worldview with the socio-psychological structures of ‘Männerbünde’ or ‘male-groups’. In doing so, it traces the gnostic method of interpreting the human condition from efforts to build an ideological superstructure in order to secure the interests of solely secular groupings; the so-called “Männerbünde’. By developing pseudo-theological constructions with their hint of true ‘theo’-logy, these secular groupings attempt to seduce people into following these newly-developed pseudotheological systems which in fact deliver them helplessly into the grip of the ‘Männerbünde’. It is through means such as these pseudo-theologies that the ‘Männerbünde’ endeavour to win almost unlimited power over the common people; hence the article's title, ‘Religion in the service of an elite’.The second element of the title, ‘A sociologically defined imposture’, refers to myunderstanding that the creation of the pseudo-theology by the ‘Minnerbünde’ does not follow the demands of theological truth but is instead ‘defined’ by the sociological rules which are to be observed if one wants to subject others to one's own private aims.Whereas the book exemplifies the proposed ideas on a larger scale by centring on historical situations taken principally from ancient and modern indo-european contexts, the present article focuses on one of the best known ‘Männerbünde’, namely, the Spartan commonwealth. Sparta's special structures, which are highly relevant in illustrating this thesis, were not considered in the book.Finally, the analysis of the Spartan material has been effected through an abstractgeneral approach, and through a socio-psychological exposition of the structures which underly and interpret the ‘Männerbünde’ text, which mainly consists of historical arguments. It is this general approach which I shall consider first.     

How magic survived the disenchantment of the world

This article argues that the process described by Max Weber as the ‘disenchantment of the world’ is compatible with the continued vitality of ‘the occult’ in contemporary western culture. Focusing on the example of ‘hermetic’ magical traditions in western culture before and after the pivotal period of the Enlightenment, the article analyses the relation between continuity and change in the development of these traditions from three angles: their theories of magical efficacy, the nature of their practices and the ways in which magicians seek to legitimate magic to the wider society as well as to themselves. The discussion demonstrates that the transformation of magic under the impact of modernization and secularization resulted in the paradoxical phenomenon of a ‘disenchanted magic’. The article concludes by proposing a theory that explains why it is actually quite natural for magic to have survived the disenchantment of the world.     

Vigilance, personality and strength of the nervous system

Numerous attempts have been made to explain the overall level of performance and the change in performance over time in vigilance tasks in terms of the proposed inverted U relationship between performance and ‘arousal’. The present experiment investigated the effects on vigilance performance of the following variables: introversion, neuroticism, time of day, accessory sensory stimulation, ‘signal frequency’ and time on task. Some measures of subjective state and body temperature were also included. The behavioural measures of overall performance revealed interactions involving neuroticism and time of day, and between neuroticism and frequency. This may reflect the operation of response bias factors, though these may be influenced by ‘arousal’. There were also main effects for several of the factors which may have practical significance. There was a significant effect of time on task on all the behavioural measures but no clearcut effects of personality on the vigilance ‘decrement’. It is argued that the latter may not provide the most satisfactory test of the inverted U model and its relationship to personality. However, interactions between noise and time on task for some of the measures may have practical importance. Measures of subjective state showed a fall in the reported level of ‘arousal’ accompanied by a rise in reported ‘stress’ and ‘anxiety’ with time on task. Body temperature was higher after the task than before.     

Eliade on diplomatic service in London

It was in England that Mircea Eliade started writing the volume which would be published nearly a decade later as Traité d'histoire des religions (Patterns in Comparative Religion), as attested by the book's Avant-propos de l'auteur, dated ‘Oxford 1940/Paris 1948.’ Eliade also states in his autobiography (1988, p. 84) that ‘I read, took notes, and elaborated a plan of a vast synthesis of the morphology and history of religions, a synthesis I had glimpsed instantaneously in an air raid shelter during an alarm.’ In order to recreate the historical and political environment in which Eliade conceived and began to write his fundamental theoretical book, I have sketched the history of Great Britain's early involvement in World War II, the dramatic political events in Romania during Eliade's diplomatic service in London, and the British government's intrigues that held him a virtual ‘captive’ from September 1940 to February 19411     

Positive priming: Locations containing relevant information are labeled accordingly

Individuals engaged in a location task where the relevancy status [relevant (stimulus) vs irrelevant (distractor) information] of these locations was reversed from one trial (prime) to the next (probe). The results produced by these reversals (Distractor-to-Stimulus and Stimulus-to-Distractor) indicated that both stimulus and distractor items are given relevancy status labels which participate in the future processing at the labeled locations. These findings support the view that selective processing involves both ‘facilitatory' and ‘inhibitory' components. Further, unlike identity tasks, the data indicated that neither the formation nor the subsequent use of these ‘location' labels (stimulus or distractor) is related to the presence of a response conflict.PsycINFO classification: 2330; 2340     

Adapting to life’s slings and arrows: Individual differences in resilience when recovering from an anticipated threat

Following highly negative events, people are deemed resilient if they maintain psychological stability and experience fewer mental health problems. The current research investigated how trait resilience [Block, J., & Kremen, A. M. (1996). IQ and ego-resiliency: Conceptual and empirical connections and separateness. Journal of Personality and Social Psychology, 70(2), 349–361, ER89] influences recovery from anticipated threats. Participants viewed cues (‘aversive’, ‘threat’, ‘safety’) that signified the likelihood of an upcoming picture (100% aversive, 50/50 aversive/neutral, or 100% neutral; respectively), and provided continuous affective ratings during the cue, picture, and after picture offset (recovery period). Participants high in trait resilience (HighR) exhibited more complete affective recovery (compared to LowR) after viewing a neutral picture that could have been aversive. Although other personality traits previously associated with resilience (i.e., optimism, extraversion, neuroticism) predicted affective responses during various portions of the task, none mediated the influence of trait resilience on affective recovery.     

Size invariance in visual number discrimination

Summary This study deals with the observer's ability to discriminate the numerosity of two random dot-patterns irrespective of their relative size. One of these two patterns was a reference one that was always composed of 32 dots randomly distributed within aK ×K invisible square window (K = 1.92°). The second one was the test pattern with one of the five magnifications (K = 0.64°, 1.28°, 1.92°, 2.56°, 3.20°) and the relative number of dots varied on 11 levels (N = –15, –12, –9, –6, –3, 0, 3, 6, 9, 12, or 15 dots). The observer's task was to indicate which of the two patterns contained more dots. The results show that the stimulus size, as an irrelevant stimulus attribute, can be ignored in the judgements about relative numerosity. This means that the perceived numerosity is size invariant, at least for a 1.6-times magnification and a 3-times reduction of the test pattern. The size invariance observed constrains the range of potential models, since the perceived numerosity can be identified only by means of a feature of the stimulus that will remain invariant after any change in the absolute stimulus size.     

Asymmetrical stimulus generalization following differential fear conditioning

Rodent ultrasonic vocalizations (USVs) are ethologically critical social signals. Rats emit 22 kHz USVs and 50 kHz USVs, respectively, in conjunction with negative and positive affective states. Little is known about what controls emotional reactivity to these social signals. Using male Sprague–Dawley rats, we examined unconditional and conditional freezing behavior in response to the following auditory stimuli: three 22 kHz USVs, a discontinuous tone whose frequency and on–off pattern matched one of the USVs, a continuous tone with the same or lower frequencies, a 4 kHz discontinuous tone with an on–off pattern matched to one of the USVs, and a 50 kHz USV. There were no differences among these stimuli in terms of the unconditional elicitation of freezing behavior. Thus, the stimuli were equally neutral before conditioning. During differential fear conditioning, one of these stimuli (the CS⁺) always co-terminated with a footshock unconditional stimulus (US) and another stimulus (the CS⁻) was explicitly unpaired with the US. There were no significant differences among these cues in CS⁺-elicited freezing behavior. Thus, the stimuli were equally salient or effective as cues in supporting fear conditioning. When the CS⁺ was a 22 kHz USV or a similar stimulus, rats discriminated based on the principal frequency and/or the temporal pattern of the stimulus. However, when these same stimuli served as the CS⁻, discrimination failed due to generalization from the CS⁺. Thus, the stimuli differed markedly in the specificity of conditioning. This strikingly asymmetrical stimulus generalization is a novel bias in discrimination.     

Inverse effectiveness, multisensory integration, and the bodily self: Some statistical considerations

A recent report in Consciousness and Cognition provided evidence from a study of the rubber hand illusion (RHI) that supports the multisensory principle of inverse effectiveness (PoIE). I describe two methods of assessing the principle of inverse effectiveness (‘a priori’ and ‘post-hoc’), and discuss how the post-hoc method is affected by the statistical artefact of ‘regression towards the mean’. I identify several cases where this artefact may have affected particular conclusions about the PoIE, and relate these to the historical origins of ‘regression towards the mean’. Although the conclusions of the recent report may not have been grossly affected, some of the inferential statistics were almost certainly biased by the methods used. I conclude that, unless such artefacts are fully dealt with in the future, and unless the statistical methods for assessing the PoIE evolve, strong evidence in support of the PoIE will remain lacking.     

A critical examination of Michael Polanyi's conception of skills

In this paper I will consider some of the main issues in Michael Polanyi's discussion of ‘Skills’ from Chapter 4 of his book Personal Knowledge published in 1958.The concept of ‘skill’ features prominently in psychological theories of human performance in activities such as games, gymnastics, swimming and dance; such theories are often applied to other spheres of human activity in which issues about skill acquisition arise. It is not surprising to discover that skill theory is considered to be essential to the study of human movement and physical education. Physical education teachers in schools have consistently maintained that ‘skill acquisition’ is a major objective for the P.E. curriculum — see Kane 1974. Yet concepts such as ‘skill’, ‘ability’ and ‘know-how’ are constituent features of practical knowledge therefore the notion of ‘skill acquisition’ on its own will not do as a curriculum objective since all instances of skill and practical knowledge are specific to their contexts, namely, to different practical activities. If particular activities are valued in schools in the pursuit of children's learning and education it seems necessary to clarify the epistemological features of such activities in order to understand what it means to teach them and what it means for children to learn and know-how to perform them successfully. It is in these respects that the concept of ‘skill’ in different human activities should attract the interest of physical education students. In order to draw attention to major features of Polanyi's thesis on the nature of ‘skill’ I shall consider the relevance of his ideas about skill and knowledge in relation to human action theory. I suggest that misconceptions may arise in teaching and learning theories relating to ‘playing soccer’ if the basic underlying ideas about ‘skill’ in human activities are inconsistent with ideas about human action or, say, practical reasoning. It is this issue that is not, in my view, attended to by Polanyi in his discussion of ‘skill’. Thus, if my criticisms of Polanyi's ideas are shown to be valid it will be necessary, by implication that is, to exercise caution before any attempt is made to use his thesis as a basis from which to formulate ideas about teaching skills and skill acquisition. The extensive use I make of quotations from Polanyi's writings is necessary because it is towards Polanyi's use of language in his explanation of ‘skills’ that much of my criticism is directed. It is hoped that what follows may provide students of human movement and physical education with an insight into Polanyi's view of ‘skills’ in particular and to issues related to skill theory and human action in general.     

Logical reasoning in schizotypal personality

It was examined whether psychotic-like personality traits in a sample of 205 college students could predict logical reasoning deficits, akin to those seen in schizophrenia. The participants were tested on their ability to assess the logical validity of premises (Logical Reasoning Task), and completed a multi-dimensional schizotypy inventory (O-LIFE). Low accuracy was associated with increased levels of disorganized schizotypy (‘Cognitive Disorganization’), while elevated errors were associated with increased levels of positive (‘Unusual Experiences’), negative (‘Introvertive Anhedonia’) and impulsive (‘Impulsivity Non-conformity’) schizotypy. Nevertheless, multiple regression analyses revealed that negative schizotypy was retained as the only significant predictor after performance was corrected for random guessing, and the contribution of the average amount of time spent on each premise was controlled. The results suggest that, although most schizotypy dimensions have a detrimental effect on reasoning performance, possibly due to disadvantageous test-taking strategies, negative schizotypy is the most reliable predictor of logical reasoning deficits. It is proposed that social/interpersonal schizotypal traits, like negative symptoms of schizophrenia, are accompanied by deficient executive functions of working memory, which appear to undermine, inter alia, logical reasoning processing.     

Visual enhancement of touch and the bodily self

We experience our own body through both touch and vision. We further see that others’ bodies are similar to our own body, but we have no direct experience of touch on others’ bodies. Therefore, relations between vision and touch are important for the sense of self and for mental representation of one’s own body. For example, seeing the hand improves tactile acuity on the hand, compared to seeing a non-hand object. While several studies have demonstrated this visual enhancement of touch (VET) effect, its relation to the ‘bodily self’, or mental representation of one’s own body remains unclear. We examined whether VET is an effect of seeing a hand, or of seeing my hand, using the rubber hand illusion. In this illusion, a prosthetic hand which is brushed synchronously—but not asynchronously—with one’s own hand is felt to actually be one’s hand. Thus, we manipulated whether or not participants felt like they were looking directly at their hand, while holding the actual stimulus they viewed constant. Tactile acuity was measured by having participants judge the orientation of square-wave gratings. Two characteristic effects of VET were observed: (1) cross-modal enhancement from seeing the hand was inversely related to overall tactile acuity, and (2) participants near sensory threshold showed significant improvement following synchronous stroking, compared to asynchronous stroking or no stroking at all. These results demonstrate a clear functional relation between the bodily self and basic tactile perception.