Attention and personality in augmenting/reducing of visual evoked potentials

Earlier research has shown that extraverts tend to increase their visual evoked potential amplitudes with increasing light intensity (augmenting), while introverts reach their maximum amplitude at lower intensities (reducing). The evoked response has normally been measured from association areas of the brain (at the vertex). The present study measured VEP amplitudes over visual cortex and at the vertex, using four light intensities in two conditions, where attention was either directed towards the light stimuli, or away from them by a concurrent auditory task. Forty subjects were classified as extraverts or introverts based on the Eysenck Personality Inventory. The results show that attention interacted significantly with extraversion. Introverts exhibited a narrower focus of attention, while higher amplitudes and amplitude-intensity functions when attending to the light flashes and lower when distracted. Extraverts showed smaller differences between conditions, indicating a more evenly distributed attention. Higher arousal in introverts is the probable cause of their narrower focus of attention. There were marked differences in the distribution of activity between vertex and occipital cortex. Introverts showed relatively stronger occipital responses and extraverts stronger vertex responses across all intensities and in both conditions. The predisposition for mainly perceptual responses to aversive stimuli in introverts, and for general alerting and motor preparatory responses in extraverts, are interpreted as supportive of Brebner and Cooper's hypothesis that introverts are ‘geared to inspect’ and extraverts are ‘geared to respond’.     

Sensation seeking and stimulus intensity as modulators of cortical,cardiovascular, and electrodermal response: A cross-modality study

Previous studies have related the trait of sensation seeking to augmenting of the evoked potential (EP) in both visual and auditory modalities and to electrodermal and heart rate (HR) orienting and defensive reactions. The present study examined all of these phenomena in the same sample of subjects in order to replicate previous findings, and investigate cross-modality consistency and relationships between cortical and peripheral responses. Fifty-four male subjects, scoring high or low on the Disinhibition Sensation Seeking Scale, were exposed to 4 intensities of auditory stimuli (tones) on one occasion and visual stimuli (light flash) on another. Two interstimulus (ISIs) intervals were used for each set of stimuli: first a 17 sec series, and then a 2 sec series. High disinhibitors showed EP augmenting and lows reducing on 3 of the 4 series; differences were significant on two of them. High disinhibitors showed stronger orienting (deceleratory) HR responses to visual and auditory stimuli while lows showed stronger defensive (acceleratory) HR responses. HR responses were significantly correlated across stimulus modalities. Auditory and visual EP slope measures were correlated only for the long ISI series.     

Reaction time and temporal serial judgment: corroboration or dissociation?]

Dissociations between a motor response and the subject's verbal report have been reported from various experiments that investigated special experimental effects (e.g., metacontrast or induced motion). To examine whether similar dissociations can also be observed under standard experimental conditions, we compared reaction times (RT) and temporal order judgments (TOJ) to visual and auditory stimuli of three intensity levels. Data were collected from six subjects, each of which served for nine sessions. The results showed a strong, highly significant modality dissociation: While RTs to auditory stimuli were shorter than RTs to visual stimuli, the TOJ data indicated longer processing times for auditory than for visual stimuli. This pattern was found over the whole range of intensities investigated. Light intensity had similar effects on RT and TOJ, while there was a marginally significant tendency of tone intensity to affect RT more strongly than TOJ. It is concluded that modality dissociation is an example of "direct parameter specification", where the pathway from stimulus to response in the simple RT experiment is (at least partially) separate from the pathway that leads to a conscious, reportable representation. Two variants of this notion and alternatives to it are discussed.     

Conscientiousness and Extraversion relate to responsiveness to tempo in dance

Previous research has shown broad relationships between personality and dance, but the relationship between personality and specific structural features of music has not been explored. The current study explores the influence of personality and trait empathy on dancers’ responsiveness to small tempo differences between otherwise musically identical stimuli, measured by difference in the amount in acceleration of key joints. Thirty participants were recorded using motion capture while dancing to excerpts from six popular songs that were time-stretched to be slightly faster or slower than their original tempi. Analysis revealed that higher conscientiousness and lower extraversion both correlated with greater responsiveness to tempo change. Partial correlation analysis revealed that conscientiousness remained significantly correlated with responsiveness when extraversion was controlled, but not vice versa. No effect of empathy was found. Implications are discussed.     

A quantitative review of the relations between the “Big 3” higher order personality dimensions and antisocial behavior

In this meta-analytic review, Hans J. Eysenck’s theory of criminality (Eysenck, 1964, Eysenck, 1977) serves as a theoretical framework for examining the relations between higher order personality dimensions and antisocial behavior (ASB). The three higher order dimensions examined are referred to as extraversion/sociability, neuroticism/emotionality, and impulsivity/disinhibition (see Sher & Trull, 1994), and they are likened to Eysenck’s dimensions of extraversion (E), neuroticism (N), and psychoticism (P), respectively (Eysenck & Eysenck, 1975) and Tellegen’s dimensions of positive emotionality (PEM), negative emotionality (NEM), and constraint (reversed) (CON), respectively (Tellegen, 1982). Ninety-seven samples, from 52 published and unpublished studies, were reviewed. The results indicated that among the “Big 3” personality dimensions, impulsivity/disinhibition is most strongly related to ASB and extraversion/sociability is least strongly related to ASB. Additional variables, including age and methodological differences, were found to moderate the associations between the personality dimensions and ASB.     

Personality,time of day and visual perception: Preferences and selective attention

The study examined the relationships between Eysenck's personality dimensions and certain aspects of visual perception employing a sample of 83 females. Interaction effects of time of day were emphasized. As to personality, the focus was on the extraversion components Impulsivity (I) and Sociability (S). As to perception, two major aspects were focused on: (1) preferences for (a) colour and (b) form, and (2) selective attention to the salient feature (form complexity) of present stimuli using a person-centered ANOVA approach. The personality by time-of-day interaction hypothesis was only supported for the I (and not S) component, under conditions 1a and 2; in the morning high I scorers preferred more stimulating colours, and paid less attention to form complexity, than low I scorers whereas a reverse pattern emerged in the evening. Neuroticism showed no relationship to perception whereas psychoticism was found to be positively related to colour reactivity and negatively related to reactivity to meaningfulness of stimuli. The findings are discussed in the context of theories about cortical arousal, diurnal rhythm differences, and ‘narrowed attention’.     

Reliability of auditory responses under increasing intensity of visual stimulation in relation to personality

Auditory thresholds were determined in each subject on two different occasions, by a modified method of limits under 10 intensities of light. Coefficients of reliability and analyses of variance of the data showed significant reliability of responses to tones in introverts (I) and extraverts (E), under increasing intensities of light. The auditory responses were most reliable in I and least in ambiverts (A). The same visual stimuli produced the same effects on auditory sensitivity, in the same subjects, on different days. These effects included facilitation and inhibition of sensitivity in I, facilitation in E and A, and interaction of intensity conditions and personality type.     

元记忆监测与人格特征相互关系的实验研究

运用ＲＪＲ标准程序,考察了元记忆监测与两种人格维度（内外向以及情绪性）的关系,结果表明：元记忆监测水平受到了人格自身优势倾向性及其行为定向性的影响,人格的内外向特点和情绪稳定性特点直接制约着元记忆监测的准确性和稳定性。据此认为元记忆能力的度量和开发,应充分考虑人格因素的影响。     

Personality and risk-taking: common biosocial factors

The first part of this article describes a study of the relationships between personality and risk-taking in six areas: smoking, drinking, drugs, sex, driving, and gambling. The participants, 260 college students, were given self-report measures of risky behaviors in each of the six areas and the Zuckerman-Kuhlman five-factor personality questionnaire. Generalized risk-taking (across all six areas) was related to scales for impulsive sensation seeking, aggression, and sociability, but not to scales for neuroticism or activity. Gender differences on risk-taking were mediated by differences on impulsive sensation seeking. The second part discusses biological traits associated with both risk-taking and personality, particularly sensation seeking, such as the D4 dopamine receptor gene. the enzyme monoamine oxidase, and augmenting or reducing of the cortical evoked potential. Comparative studies show relationships between biological markers shared with other species and correlated behaviors similar to sensation seeking in humans. A biosocial model of the traits underlying risk-taking is presented.     

Visual evoked potential augmenting/reducing slopes in cats—1. Reliability as a function of flash intensity range

A cat model for the study of individual differences in augmenting/reducing of the visual evoked potential (VEP) is proposed. Multiple VEP sessions over an extended time period of 20 months permitted analysis of the stability of VEP amplitudes and augmenting/reducing slopes. The VEP was found to have a stable shape at a given intensity and served as a unique individual signature for each cat. Three intensity ranges (low, 0.2–15 lumens/m²/sterrad. sec; medium, 1–1501/m²/sr. s; and high, 20–1500 1/m²/sr.s), and four early components of the VEP (P1, N1, P2 and N2) were studied. A cortical inhibitory threshold was reached for most cats in the medium range of intensities. However, VEP amplitudes were variable, and only the N1 and P1 − N1 components at the medium range of intensities yielded reliable augmenting/reducing slopes. Averaging slopes of individual runs improved reliability, and the average N1 amplitude slopes for each of 3 sessions at the medium range of intensities correlated at r#62;0.9.     

Extraversion,Openness to Experience,and Global Career Intention: The Mediating Role of Cultural Intelligence

Drawing from social cognitive career theory, this study asserts that the personality traits of extraversion and openness to experience are positively and significantly related to global career intention (GCI). Moreover, drawing from self‐efficacy theory, this study asserts that cultural intelligence mediates the relationship between these personality traits and GCI. Results from a study in Australia of 158 undergraduate students demonstrated that extraversion and openness to experience are positively and significantly related to GCI. Results also showed that cultural intelligence partially mediates the relationship between (a) extraversion and GCI and (b) openness to experience and GCI.     

Associations between personality and driving behavior are mediated by mind-wandering tendency: A cross-national comparison of Australian and Italian drivers

ObjectiveThis study examined the associations between personality traits (i.e., neuroticism, extraversion, openness, agreeableness, and conscientiousness) and aberrant driving behaviors in a sample of Australian and Italian drivers by investigating the mediation effect of mind-wandering (MW) tendency.BackgroundAlthough unsafe driving behaviors are influenced by both a driver’s MW tendency and personality traits, the potential interaction between these variables and their association with aberrant driving behaviors has not been previously investigated.MethodNine-hundred and four active drivers (n = 452 Australians, n = 452 Italians) completed an online survey related to their self-reported personality traits, driving behaviors, and MW tendency.ResultsA multi-group path analysis showed that MW tendency significantly mediated the effects of neuroticism, extraversion, and conscientiousness on aberrant driving behavior with invariances across nationality groups.ConclusionThese results suggest that the association between personality traits and aberrant driving behaviors is partially explained by a driver’s MW tendency while driving. Further research is needed to understand these relationships using objective measures of MW while driving (e.g., the probe-caught method). The findings of this study suggest that the assessment of personality traits may have important implications for inattentive and distracted driving and fitness-to-drive evaluation purposes.     

Extraversion, sensation seeking and electrodermal response: Probing a paradox

Extraversion and psychoticism are thought to relate inversely to electrodermal response amplitude. Paradoxically, sensation-seeking scales, which correlate positively with extraversion and psychoticism, have shown a positive relation to electrodermal response amplitude. In the present inquiry, inverse relationships were obeserved for extraversion and psychoticism with the electrodermal response to visual stimuli. Sensation seeking was also negatively related to the magnitude of the initial electrodermal response to pictures. A lowered response to words for low sensation seekers was observed that appeared to be influenced by skin conductance level.     

The Role of a “Happy Personality” in the Relationship of Subjective Social Status and Domain-Specific Satisfaction in China

Most scholars have focused on group differences in overall life satisfaction, and little research has explored group differences in domain-specific satisfaction. This study investigated the variation in the effects of subjective social status on domain-specific satisfaction across personality styles (combined extraversion and neuroticism) in a sample of 1120 female and 745 male Chinese. Participants completed a questionnaire comprising demographics factors, MacArthur Scale, BFI personality scale and self-rated domain-specific satisfaction with interpersonal, health, political, financial, environmental, environmental, and cultural. The findings revealed that subjective social status positively, extraversion positively, and neuroticism negatively predicted six domain-specific satisfactions. Additionally, the results of the hierarchical regression analysis confirmed that the moderating roles of personality traits, but neither extraversion nor neuroticism alone moderated the effects of subjective social status on six domains of life satisfaction. Higher subjective social status related to a substantial increase in domainspecific satisfaction with health, political and environmental for respondents with high extraversion and low neuroticism. Taking together, from the “bottom-up” perspectives, these findings provide support to extend Maslow’s hierarchy of needs theory to explain the relationship between subjective social status and domain-specific satisfaction.

     

High-intensity sound increases the size of visually perceived objects

The effect of audiovisual interactions on size perception has yet to be examined, despite its fundamental importance in daily life. Previous studies have reported that object length can be estimated solely on the basis of the sounds produced when an object is dropped. Moreover, it has been shown that people typically and easily perceive the correspondence between object sizes and sound intensities. It is therefore possible that auditory stimuli may act as cues for object size, thereby altering the visual perception of size. Thus, in the present study we examined the effects of auditory stimuli on the visual perception of size. Specifically, we investigated the effects of the sound intensity of auditory stimuli, the temporal window of audiovisual interactions, and the effects of the retinal eccentricity of visual stimuli. The results indicated that high-intensity auditory stimuli increased visually perceived object size, and that this effect was especially strong in the peripheral visual field. Additional consideration indicated that this effect on the visual perception of size is induced when the cue reliability is relatively higher for the auditory than for the visual stimuli. In addition, we further suggest that the cue reliabilities of visual and auditory stimuli relate to retinal eccentricity and sound intensity, respectively.     

听觉失匹配负波反映自动加工──感觉道间选择性注意时的新证据

为考察听觉失匹配负波是否反映自动加工,实验改进了视觉和听觉刺激同时呈现的感觉道间选择性注意实验模式,更好地控制了非注意听觉条件。结果发现,在注意与非注意听觉条件下,听觉偏离刺激均诱发出失匹配负波;注意听觉刺激时１４０－１８０ｍｓ的偏离相关负波与非注意时该时程负波的平均波幅之间无显著差异,而注意时１８０－２２０ｍｓ的偏离相关负波的平均波幅大于非注意时同一时程之负波;非注意听觉时失匹配负波的平均波幅和峰潜伏期不受视觉道任务难度的影响,该结果为听觉失匹配负波反映自动加工的观点提供了进一步证据。     

The role of personality in task and relationship conflict

Two studies explored the extent to which dispositions influence the attributions individuals make about the type of conflict they experience. Traits from the Five-Factor Model of personality (FFM) were linked to the tendency to experience task-and relationship-oriented conflict. Results provide some support for the idea that individuals have stable tendencies in the attributions they make about their conflict experiences across time, partners, and situations. Agreeableness and openness were related to reports of relationship conflict at the individual level. However, the strongest effects of personality on conflict attributions were found in the analysis of dyads. This analysis revealed that partner levels of extraversion and conscientiousness were associated with individuals' tendencies to report relationship conflict. Moreover, mean levels of extraversion and conscientiousness in a pair were associated with reports of relationship conflict. Differences between partners in extraversion were associated with more frequent conflict and a greater likelihood of reporting task-related conflict. Implications of these findings with respect to the role of personality in interpersonal relationships are discussed. Finally, these studies provide confirmatory evidence that conflict attributions have a meaningful impact on relationship satisfaction.     

Extraversion and neuroticism in orienting reflex dishabituation

The present study examined the effects of extraversion (E) and neuroticism (N) as individual difference dimensions and of stimulus intensity on electrodermal orienting response habituation, test response, and dishabituation. Subjects were 162 college students selected from a screening sample of 860 as representing extreme groups of high, medium, and low E crossing with high, medium, and low N. Subjects in all nine resulting groups were habituated to criterion on auditory stimuli of 60, 80, and 100 db. A novel (test) stimulus and a dishabituating standard stimulus followed criteron habituation at each intensity. Results indicated that response amplitude for initial, test, and dishabituation responses was a direct function and that habituation rate (trials-to-criterion) was an inverse function of stimulus intensity. Extraverts habituated more rapidly than introverts at high intensity and gave smaller test and dishabituation responses. Some results differed when regression coefficients defined habituation rate and when first stimulus intensities alone were examined. Correlations among initial, test, and dishabituation responses and between each of these and the two measures of habituation rate are also reported. Results were interpreted as partially supportive of Eysenck's theory.