Individual functions of subjective time distance and emotional reaction

Lundberg, U. & Ekman, G. Individual functions of subjective time distance and emotional reaction. Scand. J. Psychol., 1973, 14, 29–33.-Data from a previous study ere analysed on an individual level. It was found that a simple power function could describe the relation between subjective and objective time, while an exponential function fitted the data for the relation between emotional reaction and subjective time distance. The same simple alternative functions also described the group data in the previous study.     

Scotopic contrast hues displaced toward blue

Abstract.— Pre-stimulation with a neutral white light, in a dark-adapted state, produced a disposition for a scotopic hue of violet of about 463 nm. The observation may be explained on the basis of Helmholtz's theory of complementary negative afterimages, provided that (1) the assumption that neutral white is observed when the three types of cone receptors are activated to about the same degree, is rejected, and (2) the origin of the scotopic contrast hues is assumed to be located centrally to the photochemical systems of the receptors.     

Active and passive avoidance performances following bilateral olfactory bulbectomy

Three experiments were performed to study the effects of bilateral olfactory bulbectomy upon active and passive avoidance conditioning. In the first experiment, olfactory bulbectomized rats were found not to be impaired on a one-way active avoidance task but showed a fear retention deficit. In Experiment 2, sham-operated rats demonstrated a degree of fear retention that was a positive linear function of the number of shock presentations; olfactory bulbectomized rats showed a total absence of fear retention. In the third experiment olfactory bulbectomized rats failed to demonstrate the inverse relationship between shock intensity and two-way avoidance performance normally evidenced. The pattern of data obtained suggests that while bulbectomized rats do not show any general avoidance impairment they do seem to be unaffected by the suppressive effects of shock upon ongoing behavior.     

Multidimensional analysis of twenty-one odors

Berglund, B., Berglund, U., Engen, T., & Ekman, G.¹ Multidimensional analysis of twenty-one odors. Scand. J. Psychol., 1973, 14, 131–137.-The present paper reports an experiment on the application of multidimensional scaling to the sense of smell for the purpose of revealing basic psychophysical dimensions of odorants matched in perceived intensity and varying only in perceived quality. The results showed clear evidence for the existence of individual odor spaces, but in apparent contradiction to related studies in the literature individual differences were too large to establish a representative odor space for the whole group. For nearly all individual subjects one of the factors extracted seemed to represent a unique hedonic dimension apparently unrelated to the physical attributes of the odorants. It is suggested that such psychological factors may be as important a basis for the judgment of the similarity of odors as the physical attributes of the odorants. Both the interpretation of multidimensional analysis and the extent to which the sense of smell is analytic or synthetic depend on an understanding of this problem.     

Chromatic rod vision VIII. Simultaneous contrast

Stabell, U. & Stabell, B. Chromatic rod vision. VIII. Simultaneous contrast. Scand. J. Psychol., 1973, 14, 1619.-Compared with the curve of additive opponent hue, the curve of scotopic hue of simultaneous contrast was found to be displaced toward blue in the orange and green-yellow regions of inducing field. The results are explained on the assumptions that (a) change of disposition for scotopic hue reflects variation in ratio of primary hue-related processes of inducing field, and (b) the chromatic-related opponent processes, in a dark-adapted and chromatically neutral eye, are of equal magnitude within the photochromatic interval.     

The influence of emotional conditions on imilarity estimations of emotional terms

Abstract.— Twenty-four male university students made similarity estimations whilst under the influence of five strongly contrasting emotional inducing situations and in a neutral situation. Intra- and interindividual comparisons between the results indicate that a high degree of stability was maintained by each individual over time whereas differences appeared between individuals. The results suggest that subjects are well able to produce about the same result in spite of heightened levels of emotional state.     

Type A behavior and its relation to personality variables in Swedish male and female university students

A questionnaire based on the Jenkins Activity Survey (JAS), given to 181 male and 280 female Swedish university students, showed that females had significantly higher Type A scores than males. Three factors were extracted by factor analysis, two of which, "speed and impatience" and "hard-driving", corresponded to two of the factors obtained by JAS in an American population of employed men (Zyzanski & Jenkins, 1970). The third factor was tentatively termed "engagement-involvement". Twelve male and 12 female subjects from opposite ends of the distribution were compared in terms of 22 personality variables measured by questionnaires. It was found that Type A subjects of both sexes scored higher on scales measuring anxiety-proneness, aggression-hostility, extraversion and neuroticism.     

Facial reactions to fear-relevant stimuli for subjects high and low in specific fear

This study was performed to investigate whether subjects high and low in fear of snakes react with different facial electromyographic (EMG) responses when exposed to snakes. Two groups of subjects were exposed to slides of snakes or flowers. After the experiment they rated their fear of snakes on a questionnaire and based on these ratings they were divided into high and low fear groups. Facial EMG was measured from the corrugator and zygomatic muscle regions. As predicted the high fear group reacted with a facial response interpretable as a negative emotional reaction whereas the low fear group did not. This difference was specific to snakes because high and low groups did not differ in responses to slides of flowers. The results are consistent with the proposition that facial EMG technique is a sensitive tool to distinguish reactions between subjects high and low in specific fears.     

Involvement in four future events as a function of temporal distance

Abstract.— A total of 91 Swedish high-school students, in four groups, estimated their degree of involvement in each of 4 potential future events, which were assumed to occur at 5 alternative points in time within the next 75 years. In addition, estimates were made of the relative importance of the events as well as of their subjective probability and influenceability. Factor analysis revealed two different time-involvement relations: (1) involvement decreasing slowly with increasing temporal distance for the two next decades. and then rapidly approaching zero, and (2) involvement decreasing rapidly for the nearest decades, and then slowly approaching an asymptotic value. Subjects representing the first trend gave consistently higher estimates of event probability. Relative involvement for the events was judged differently by subjects in natural-science and social-science lines of education.