Approximate entropy and point correlation dimension of heart rate variability in healthy subjects

The contribution of nonlinear dynamics to heart rate variability in healthy humans was examined using surrogate data analysis. Several measures of heart rate variability were used and compared. Heart rates were recorded for three hours and original data sets of 8192 R-R intervals created. For each original data set (n=34), three surrogate data sets were made by shuffling the order of the R-R intervals while retaining their linear correlations. The difference in heart rate variability between the original and surrogate data sets reflects the amount of nonlinear structure in the original data set. Heart rate variability was analyzed by two different nonlinear methods, point correlation dimension and approximate entropy. Nonlinearity, though under 10 percent, could be detected with both types of heart rate variability measures. More importantly, not only were the correlations between these measures and the standard deviation of the R-R intervals weak, the correlation among the nonlinear measures themselves was also weak (generally less than 0.6). This suggests that in addition to standard linear measures of heart rate variability, the use of multiple nonlinear measures of heart rate variability might be useful in monitoring heart rate dynamics.     

Counseling with aliens

This paper addresses the issue of the semantic problem frequently found in cross denominational counseling in terms of the theological-psychological question of openness versus closure. It secondarily touches upon the issues of establishing and maintaining a level of trust in cross denominational counseling; suggestions of several tools for the counselor to use in such counseling situations; and the advantages of counselor tensions within the confines of a cross denomination counseling situation.     

On-line brain stimulation: Measurement of threshold of reinforcement

This program and interface for a small computer (PDP8/e) performs the following operations: generates and delivers constant current stimulation to the brain of an animal, monitors electrical resistance at the stimulating electrode, and calculates the threshold of reinforcement based upon the frequency of characteristic pauses in the animal’s responding.     

The influence of adaptation on absolute threshold measurements for olfactory stimuli

A group-test method of determining the mean absolute olfactory threshold to a test stimulus for a group of subjects is described. Probit analysis is employed to evaluate the results. This technique is utilized to measure the change in sensitivity to the test stimulus due to adaptation to the masking stimulus. When the values of the logarithm of the threshold concentration of the test stimulus are plotted against the logarithm of the concentration of the masking stimulus for a pair of odorous materials, a straight line is obtained. It is suggested that the gradient of this line may be used as a measure of the degree of community of odour-property between the pair of substances.     

Career and work attitudes of blue-collar workers,and the impact of a natural disaster chance event on the relationships between intention to quit and actual quit behaviour

Despite being part of a highly visible and important occupational group, blue-collar workers have, to date, been under-represented in careers research. We explore the relevance and applicability of new career concepts to blue-collar employees, specifically, bus drivers. Based on a survey of 112 bus drivers, we test a model specifying the relationship between career attitude, perceived organizational support, psychological contract, and job satisfaction, as well as intention to quit. Employing a two-phase data collection process, we also test relationships between intentions and actual quit behaviour. Our results support the validity of career theories for blue-collar workers but with notable exceptions, such as lack of relationships between protean career and intention to quit. Contrary to intention-behaviour theory we find that actual quit behaviour was not related to intention to quit, which we attribute to a significant external chance event, a devastating earthquake, which took place during the study period. In addition, we identify relationships that appear to be unique to blue-collar workers.     

The Mad and the Past: Retrospective Diagnosis, Post-Coloniality, Discourse Analysis and the Asylum Archive

Before attempting to use as a historical source the Lucknow Lunatic Asylum case notes of the British colonial period in India, it is necessary to determine which methodological approach is most viable. The approach of historians, who attempt retrospectively to diagnose the patients of the past from the clinical details of case notes, does not satisfactorily deal with the criticism that data on medical case notes is less a series of objective observations and more a product of the power relations of the period. In contrast, medical and postcolonial historians treat the information on the case notes as a set of discursive constructions rather than a series of objective observations. By tracing the discourses in operation during construction of the Lucknow case notes, this paper identifies the ways in which the notes can be read as a series of colonial and medical discursive representations rather than as a set of clinical data.     

The myth of the collective unconscious

This essay challenges the most basic tenet of Jung’s analytical psychology, namely, the existence of the collective unconscious. Despite the fact that there are purported to be universal processes and ontological features of mind throughout all psychoanalytical schools of thought, Jung’s is unique in the history of psychoanalytic ideas for positing a supraordinate, autonomous transpersonal psyche that remains the source, ground, and wellspring from which all unconscious and conscious manifestations derive. This bold claim is analyzed through a close inspection of Jung’s texts that questions the philosophical justification for postulating a supernatural macroanthropos or reified collective mind. Pointing out the problems of agency and fallacies of hypostatization, it is not necessary to evoke a transpersonal cosmogony to explain how universality suffuses individual subjectivity within social collectives. Here we may conclude that the collective unconscious construct is a signifier for the common psychological dynamics and characteristics of shared humanity. In this sense, the myth of the collective unconscious is better understood as a metaphor for a higher abstraction or ideal principle ordained with numinous value.     

Representations of numerical and non‐numerical magnitude both contribute to mathematical competence in children

A growing body of evidence suggests that non‐symbolic representations of number, which humans share with nonhuman animals, are functionally related to uniquely human mathematical thought. Other research suggesting that numerical and non‐numerical magnitudes not only share analog format but also form part of a general magnitude system raises questions about whether the non‐symbolic basis of mathematical thinking is unique to numerical magnitude. Here we examined this issue in 5‐ and 6‐year‐old children using comparison tasks of non‐symbolic number arrays and cumulative area as well as standardized tests of math competence. One set of findings revealed that scores on both magnitude comparison tasks were modulated by ratio, consistent with shared analog format. Moreover, scores on these tasks were moderately correlated, suggesting overlap in the precision of numerical and non‐numerical magnitudes, as expected under a general magnitude system. Another set of findings revealed that the precision of both types of magnitude contributed shared and unique variance to the same math measures (e.g. calculation and geometry), after accounting for age and verbal competence. These findings argue against an exclusive role for non‐symbolic number in supporting early mathematical understanding. Moreover, they suggest that mathematical understanding may be rooted in a general system of magnitude representation that is not specific to numerical magnitude but that also encompasses non‐numerical magnitude.     

Human classifier: Observers can deduce task solely from eye movements

Computer classifiers have been successful at classifying various tasks using eye movement statistics. However, the question of human classification of task from eye movements has rarely been studied. Across two experiments, we examined whether humans could classify task based solely on the eye movements of other individuals. In Experiment 1, human classifiers were shown one of three sets of eye movements: Fixations, which were displayed as blue circles, with larger circles meaning longer fixation durations; Scanpaths, which were displayed as yellow arrows; and Videos, in which a neon green dot moved around the screen. There was an additional Scene manipulation in which eye movement properties were displayed either on the original scene where the task (Search, Memory, or Rating) was performed or on a black background in which no scene information was available. Experiment 2 used similar methods but only displayed Fixations and Videos with the same Scene manipulation. The results of both experiments showed successful classification of Search. Interestingly, Search was best classified in the absence of the original scene, particularly in the Fixation condition. Memory also was classified above chance with the strongest classification occurring with Videos in the presence of the scene. Additional analyses on the pattern of correct responses in these two conditions demonstrated which eye movement properties successful classifiers were using. These findings demonstrate conditions under which humans can extract information from eye movement characteristics in addition to providing insight into the relative success/failure of previous computer classifiers.