Psychometric intelligence and visual evoked potentials: a replication

Previously we have reported significant correlations between EEG visual evoked potential (EP) parameters and scores on the Raven's Advanced Progressive Matrices (RAPM) test. This study is an attempt to replicate those findings in a new sample of 27 S s. The results provide further evidence that EP amplitude is related to intelligence-test performance. There is also confirmation that stimulus luminance levels influence the magnitude of EP amplitude/intelligence correlations. In addition, the results indicate that age may be a confounding variable.     

Cognitive reserve as a moderator of responsiveness to an online problem-solving intervention for adolescents with complicated mild-to-severe traumatic brain injury

Children and adolescents with traumatic brain injury (TBI) often experience behavior difficulties that may arise from problem-solving deficits and impaired self-regulation. However, little is known about the relationship of neurocognitive ability to post-TBI behavioral recovery. To address this question, we examined whether verbal intelligence, as estimated by Vocabulary scores from the Wechsler Abbreviated Scale of Intelligence, predicted improvements in behavior and executive functioning following a problem-solving intervention for adolescents with TBI. One hundred and thirty-two adolescents with complicated mild-to-severe TBI were randomly assigned to a six-month Web-based problem-solving intervention (CAPS; n = 65) or to an Internet resource comparison (IRC; n = 67) group. Vocabulary moderated the association between treatment group and improvements in metacognitive abilities. Examination of the mean estimates indicated that for those with lower Vocabulary scores, pre-intervention Metacognition Index scores from the Behavior Rating Inventory of Executive Function (BRIEF) did not differ between the groups, but post-intervention scores were significantly lower (more improved) for those in the CAPS group. These findings suggest that low verbal intelligence was associated with greater improvements in executive functioning following the CAPS intervention and that verbal intelligence may have an important role in response to intervention for TBI. Understanding predictors of responsiveness to interventions allows clinicians to tailor treatments to individuals, thus improving efficacy.     

Ability EI as an intelligence? Associations of the MSCEIT with performance on emotion processing and social tasks and with cognitive ability

Associations among the MSCEIT, a broad-bandwidth measure of ability emotional intelligence (EI), self-report EI, social perception ability, psychometric intelligence and performance on inspection time (IT) tasks, which assessed the speed of processing of emotional and non-emotional information were investigated in two student samples (N=99, 199). The main findings were that MSCEIT scores were unrelated to fluid ability or speed of non-emotional information processing as assessed by IT, but evidence for associations of MSCEIT scores with crystallised ability was found. Positive associations were found between MSCEIT scores, self-report EI and some emotion/social task scores. The results suggest that EI as assessed by the MSCEIT has some properties of an intelligence and is more closely related to crystallised than to fluid ability. The relatively small MSCEIT/g _c correlations suggest that the MSCEIT is not a pure ability measure, although restriction of range in the samples used may also be relevant. More work, and the development of new measures, is required to determine whether performance EI has a fluid component.     

Relationship Between Emotional Intelligence and Transformational Leadership Style: A Gender Comparison

This study examined the predictive relationship between emotional intelligence and transformational leadership style. The researchers also wanted to determine gender differences in the relationship between emotional intelligence and transformational leadership style, as well as the gender differences in the emotional intelligence scores and transformational leadership style of managers. A significant predictive relationship (p < .05) was found between transformational leadership style and emotional intelligence. No significant interaction (p < .05) was found between gender and emotional intelligence while predicting transformational leadership style. A significant difference (p < .05) was found in the emotional intelligence of scores of male and female managers. Lastly, no significant difference (p > .05) was found in the transformational leadership scores of male and female managers.     

The Relationship Between Diverse Components of Intelligence and Creativity

Intelligence and creativity are accounted for in terms of two different mental operations referred to as ‘convergent thinking’ and ‘divergent thinking’, respectively. Nevertheless, psychometric evidence on the relationship between intelligence and creativity has been controversial. To clarify their relationship, we characterized the relationship between diverse components of intelligence and creativity through the administration of psychometric tests on a large sample (WAIS, RPM, and TTCT‐figural: n = 215; TTCT‐verbal: n = 137). The general intelligence factor (g) score showed significant correlations with both TTCT‐figural and TTCT‐verbal scores. However, sub‐dimensional analysis demonstrated that their association was attributable to the specific components of both TTCTs (TTCT‐figural: Abstractness of Titles, Elaboration, and Resistance to Premature Closure; TTCT‐verbal: Flexibility) rather than to their common components (Fluency and Originality). Among the intelligence sub‐dimensions, crystallized intelligence (gC) played a pivotal role in the association between g and the specific components of both TTCTs. When the total sample was divided into two IQ groups, these phenomena were more evident in the average IQ group than in the high IQ group. These results suggest that the mental operation of creativity may be different from that of intelligence, but gC may be used as a resource for the mental operation of creativity.     

The relationship between rational thinking and intelligence in children

This study ws designed to evaluate the efficacy of a four-session REE curriculum and examine the relationship between intelligence and the endorsement of irrational beliefs in elementary school children. A twotailedt-test administered to examine difference between pre- and post-test scores onThe Idea Inventory was statistically significant,t (1,94)=5.90,p<.0001. The Pearson product-moment correlation coefficient between pre-test scores onThe Idea Inventory and theOtis-Lennon School Ability Test failed to reach significance (r=.15) suggesting higher intelligence did not predict greater endorsement of rational beliefs. The post-test scores using the same two instruments reached a correlation coefficient of r=.51 and was statistically significant at the .01 level. A higher percentage of children who scored below the mean on theOtis-Lennon improved from pre- to post-test than children who scored above the mean.     

Ethnicity,school attitudes,intelligence and academic achievement

Regression surface analysis was used to examine relations between school-related attitudes and measures of academic achievement at different levels of intellectual ability, for children from different Australian ethnic groups. The sample included 660 eleven-year-old children from lower social status families, with 250 Anglo Australian children, 170 Greek, 120 Southern Italian, and 120 English children. Regression surfaces were constructed from models that examined possible linear, interaction, and curvilinear relations between the variables. The findings suggest the propositions that: (a) at each level of intelligence, increases in the affective component of school attitudes are not associated with changes in academic achievement, (b) at each level of the affective component of school attitudes, increments in intelligence test scores are related to increases in academic achievement scores, and (c) the relations between academic achievement, intelligence, and the cognitive-behavioral component of school attitudes vary for children from different ethnic groups. The results suggest that the manipulation of the cognitive-behavioral aspects of school attitudes may influence the academic performance of low social status children from different ethnic groups but educational programs that focus on the affective components of school attitudes may not be effective in changing children's academic achievement.     

Intelligence and Creativity: Over the Threshold Together?

Threshold theory predicts a positive correlation between IQ and creativity scores up to an IQ level of 120 and no correlation above this threshold. Primary school children were tested at beginning (N = 98) and ending (N = 70) of the school year. Participants performed the standard progressive matrices (SPM) and the Test of Creative Thinking—Drawing Production (TCT-DP). Each child with IQ ≥ 120 was grade-and-gender matched to a child with IQ < 120. Results in accordance with the threshold theory were found only for female children in the highest grade level (Grade 4). Longitudinal analysis implies that a subgroup of children goes down in IQ and creativity simultaneously, possibly due to motivational issues. Their correlated scores may be a source of evidence for the threshold theory. The relationship between intelligence and creativity is not straightforward and depends on a combination of factors including grade level and gender.     

Provitamin A Selection by Vitamin A Depleted Rats

G. T. scores on the Army General Classification Test (AGCT) as indicants of intelligence were correlated with scores on the Creative Imagination Test (CIT) for two groups of men differing on intelligence. Results supported the prediction of closer correspondence of intelligence and creativity scores in a low intelligence range (r = .437, p < .01) than in a high intelligence range. Intelligence was unrelated statistically to creativity (r = .10) when only the high intelligence range above 111 was considered. Guilford's triagular scatterplot conceptualization of intelligence-creativity relationship seemed most congruent with the present and earlier data. Intelligence was described as allowing the development of creativity, but not insuring such development. Personality and environmental factors may be important in creativity expression especially at upper intelligence ranges.     

A somatosensory latency between the thalamus and cortex also correlates with level of intelligence

As part of a study on speed of information processing and intelligence, 205 young adult postsecondary students were tested for somatosensory evoked potential (SEP) latencies and intelligence. Following stimulation at the wrist, latencies of three SEPs were determined: N13, generated in the cervical spinal cord/medulla region; N19, generated in the thalamus; P22, generated in the arm region of the somatosensory (parietal) cortex. These latencies and two latency differences, N19 - N13 and P22 - N19, were tested for correlation with a nonverbal measure of intelligence; only P22 - N19 significantly correlated (r = −.217; P = .013, two-tailed). Comparing this latency difference in students in the first IQ quartile (mean IQ = 103.4) with that of students in the fourth quartile (M = 131.2) showed mean differences of 4.13 ms versus 3.21 ms, respectively (p = .0034, two-tailed).P22 - N19 measures time for signal transmission from the thalamus to the sensory cortex. These results agree with considerably more extensive data on visually evoked potentials showing a negative correlation between IQ and the latency for a visual stimulus of the retina to produce a signal at the visual cortex (most of this latency is between the thalamus and the cortex; Reed & Jensen, 1992). The findings here agree with the visual results and strongly suggest that the IQ-latency correlation occurs because the latency indexes cortical nerve conduction velocity, an important component of information processing speed.     

Estimating one's own personality and intelligence scores

One hundred and eighty‐seven university students completed the full NEO‐PI‐R assessing the five super‐traits and 30 primary traits, and the Wonderlic Personnel Test of general intelligence. Two months later (before receiving feedback on their psychometric scores), they estimated their own scores on these variables. Results at the super‐factor level indicated that participants could significantly predict/estimate their own Neuroticism, Extraversion, and Conscientiousness scores. The correlation between estimated and psychometrically measured IQ was r=.30, showing that participants could, to some extent, accurately estimate their intelligence. In addition, there were a number of significant correlations between estimated intelligence and psychometrically assessed personality (particularly Neuroticism, Agreeableness and Extraversion). Disagreeable people tended to award themselves higher self‐estimated intelligence scores. Similarly, stable people tended to award themselves higher estimates of intelligence (even when other variables were controlled). Regressing both estimated and psychometric IQ scores onto estimated and psychometric personality scores indicated that the strongest significant effect was the relationship between trait scores and self‐estimated intelligence.     

Academic self-concept of ability and cortisol reactivity

The present study aimed to clarify the relationship between a school-specific trait (academic self-concept of ability [ASCA]) and hormonal stress response by using a trait-compatible stressor (test). First, we determined 52 students' ASCA scores for biology and measured their salivary cortisol concentration before and after a biology test (experimental group, n = 28) or a free writing task (control group, n = 24). For participants who took the test, statistical analysis indicated a significant negative correlation between ASCA score and cortisol response. In contrast, the control group showed a decrease in cortisol concentrations between test times and no correlation between cortisol concentration and ASCA scores were found. These findings indicated an interaction between ASCA scores and hormonal stress response when an academic-related stressor is present. Furthermore, these variables might influence each other adversely: high cortisol concentrations during a test situation may lead to greater feelings of insecurity, resulting in low ASCA scores and awareness of these low scores may lead to a further increase in cortisol, creating a vicious cycle.     

智力与心理速度的关系研究述评

目前在智力研究领域出现了一种新的研究趋势,研究者开始关注心理计量学智力与认知或生理心理学变量的相关,考察的重点是心理速度,相应的测量指标主要有检测时（IT）、反应时、ERP或神经传导速度,等等。在运用IT任务进行的ERP研究中发现,ERP波幅和潜伏期的不同往往能够反映出智力上的差异。信息加工速度和神经传导速度均与一般智力因素（g因素）存在较高的相关。上述研究发现促进了智力与心理速度关系的跨学科研究,成为智力研究领域中的热点     

An IRT Analysis of the Reading the Mind in the Eyes Test

Relationships between intelligence level and Rorschach measures of developmental level (genetic scores) were examined in clinically normal adults, hebephrenic and catatonic schizophrenics, paranoid schizophrenics, psychoneurotics, cerebrally damaged, and a mixed group of neuropsychiatric patients. The Ss were white males with an IQ range of 79 to 146, and with a chronological age range of 19 to 70. The unaltered forms of the genetic (developmental) scores were used for correlation with primarily Wechsler IQs. Generally no statistically significant relationships were found between genetic scores and intelligence level.     

Personality, intelligence and personal space among violent and non-violent delinquents

McGurk, Davis and Grehan (1981) have suggested that personality variables may have a moderating effect on the violence—personal space relationship originally reported by Kinzel (1970). Similarly, Wright (1974) has reported enhanced personal space in inmates classified as of low intelligence. The present study was undertaken in order to further investigate possible confounding effects of personality and intelligence differences on the relationship between aggressive behaviour and spatial use. A direct approach stop-distance and a semi-blind measure of personal space were obtained for a group of violent young offenders and a non-violent control group. Verbal and Non-verbal Intelligence scores and personality scores were also collected. Analysis of variance showed no significant differences in personal space size between the violent and non-violent group on any one measure. However, a significant interaction effect was found between violence, P and Non-verbal Intelligence such that violent inmates exhibited augmented personal space in relation to non-violent inmates only in the cases of those scoring both low on Non-verbal Intelligence and high on P. These findings contradict earlier research reporting a difference in spatial use between violent and non-violent Ss. It is concluded that the lack of a standardized well-controlled technique for measuring personal space has resulted in ambiguous findings in this area of research.     

Comparing subtest profiles of g loadings and correlations with RT measures

It is argued that if a response time (RT) measure correlates with psychometric test (PT) scores because it shares variance in common with general intelligence, g, then the profile of g loadings for a set of PTs would be predictable from the profile of correlations between the RT measure and the PT scores. On the other hand, if an RT correlates with PTs through variance not shared with g, the g loadings of the PTs should be unrelated to the correlations between RT and PTs. The profiles of g loadings and correlations with RT were compared for a set of 6 RT measures and 8 PT scores from Smith and Stanley (1983). To demonstrate statistical significance, standard errors of the statistics were generated by Efron's bootstrap technique (Efron, 1979). It was clearly shown that the profile of the PT's g loadings could be well predicted from the RT-PT correlations for four of the RT measures. It can be concluded that RT tasks do measure general intelligence. Analysis of the errors in prediction suggested that the RTs may correlate more with fluid than crystallized intelligence.     

A moderate financial incentive can increase effort,but not intelligence test performance in adult volunteers

A positive correlation between self-reported test-taking motivation and intelligence test performance has been reported. Additionally, some financial incentive experimental evidence suggests that intelligence test performance can be improved, based on the provision of financial incentives. However, only a small percentage of the experimental research has been conducted with adults. Furthermore, virtually none of the intelligence experimental research has measured the impact of financial incentives on test-taking motivation. Consequently, we conducted an experiment with 99 adult volunteers who completed a battery of intelligence tests under two conditions: no financial incentive and financial incentive (counterbalanced). We also measured self-reported test-taking importance and effort at time 1 and time 2. The financial incentive was observed to impact test-taking effort statistically significantly. By contrast, no statistically significant effects were observed for the intelligence test performance scores. Finally, the intelligence test scores were found to correlate positively with both test-taking importance (r_c = .28) and effort (r_c = .37), although only effort correlated uniquely with intelligence (partial r_c = .26). In conjunction with other empirical research, it is concluded that a financial incentive can increase test-taking effort. However, the potential effects on intelligence test performance in adult volunteers seem limited.     

Locus of control and achievement in child psychiatric inpatients

The relationship between the Nowicki-Strickland Locus of Control Scale for Children (Nowicki & Strickland, 1973) and academic achievement was examined in a sample of 66 child psychiatric inpatients. Previous studies had suggested that this measure correlated with achievement in normal samples (Nowicki & Strickland, 1973) but not in populations of male juvenile offenders (Little & Kendall, 1978). The product-moment correlation between the Nowicki-Strickland Scale and the Peabody Individual Achievement Test was significant. However, when the effect of IQ was controlled for in a partial correlation, there was no significant correlation. Discussion focuses on the relationship between these results and other findings in the area of locus of control, intelligence, and achievement.     

The Situational Interview as a Predictor of Academic and Team Performance: A Study of the Mediating Effects of Cognitive Ability and Emotional Intelligence

The criterion‐related and construct validity of the situational interview (SI) was examined. Both the SI and cognitive ability had predictive validity for the academic performance of managers and professionals (n=75) in an executive MBA course. Only the SI predicted teamplaying behavior assessed by peers (r=.32, p<.05). The correlation between the SI and cognitive ability was not significant. Emotional intelligence completely mediated the relationship between the SI and teamplaying behavior.