Fixations, position stereotypes and their relation to the degree and pattern of stress

We have tested Maier's hypothesis that the strength of behaviour stereotypes elicited in an insoluble problem situation is a function of stress. Forty-six white rats of Wistar stock were split into two groups, which were given an insoluble problem in a water discrimination unit under two widely different degrees of punishment. Those animals who developed position stereotypes were assigned to two subgroups within each group and were given a soluble discrimination problem under conditions of 50 and 100 per cent. punishment respectively. The strength of stereotype was measured in terms of the stereotype-breaking score.

It was found that animals trained under low punishment developed the more persistent stereotypes. Animals trained under 100 per cent, punishment developed the less persistent stereotypes and the longer spans between stereotype breaking scores and the learning criterion. The behaviour of four animals in the low punishment group was closely akin to what Maier calls “abnormal fixation”; the subgroups containing them were riot unimodally distributed. Punishment differentiated response latencies which furnished evidence that the fixated animals mastered the soluble problem, in spite of not responding appropriately.     

Neuropsychological performance in patients with fibromyalgia syndrome: relation to pain and anxiety

Previous studies have revealed the presence of cognitive impairment in patients with fibromyalgia syndrome (FMS). However, they have not determined the possible influence of the diverse clinical variables in these disturbances. The first aim of the current study is to compare the cognitive function of 81 patients with FMS and 35 healthy controls by means of a neuropsychological battery. The second aim is to determine the influence of anxiety and pain in the cognitive impairment of patients with FMS. The results of our study show that patients with FMS display a significantly lower cognitive performance and a significantly higher anxiety level than the healthy controls in all the parameters assessed. The neuropsychological performance in patients with FMS is associated with pain, and this relation was independent of the anxiety level. The relationship between cognitive performance and anxiety level was also significant. Therefore, we conclude that cognitive performance is primarily affected by pain. The level of anxiety explains part of the variability in neuropsychological tests that is not explained by pain.     

Tourette syndrome: relation to children's and parents' self-concepts

We investigated the self-concepts of Tourette Syndrome patients and their mothers. The subjects were 30 children with Tourette Syndrome and their mothers, and 30 children matched on age, sex, and socioeconomic status and their mothers. The results indicated that, while the children did not differ on self-concept, the mothers of the Tourette Syndrome patients had lower self-concepts than the mothers of the controls, suggesting that family members should be considered in the treatment of the Tourette Syndrome children. In addition, severity of illness was positively correlated with the children's reports of behavior disturbance and dysphoric mood, although not with over-all self-concept. These results indicate that in more severe cases of Tourette Syndrome, children may experience emotional problems requiring therapeutic intervention.     

The effect of sleep-loss on processing information in the functional visual field

Two experiments are reported on the effects of sleepstate on performance in a same/different matching task, where two visual signals are presented under visual angles of either 10°, 45°, or 100°. The first study showed a stronger effect of sleep-loss at a more wide display. The effect consists of two parts: one is interpreted as due to the initiation and execution of the shift of gaze from the one to the other signal, and the other to the requirement of integrating successively perceived signals. These interpretations were tested in the second study. It was found that a more pronounced effect of sleep loss occurred when two signals are successively presented, but not when the signals are simultaneously viewed, while preceded by a shift of gaze. The implications of the data are discussed.     

Movement aftereffects contingent on color,intensity, and pattern

We have found contingent movement aftereffects (CMAEs) lasting several days, contingent upon the color, intensity, and stripe width of moving patterns. Ss adapted for 10 min to a patterned disk rotating clockwise under red light, alternating every 10 sec with counterclockwise under green light. When stopped, the disk then appeared to rotate counterclockwise under red light and clockwise under green light. The effect lasted only a second or two, reappearing each time the field’s color was changed. But it increased in strength over the first 1/2 hand was still present 1 or 2 days later. Color transposition effects were found: after adaptation to red-clockwise (long wavelength) alternating with green-counterclockwise (short wavelength), a stationary yellow (long wavelength) test field appeared to rotate counterclockwise and a blue (short wavelength) field appeared to rotate clockwise. Relative, not absolute, color of the test triggered the CMAE. Similar CMAEs and transposition effects were produced by pairing direction of movement with intensity, with width of moving stripes and with orientation of a stationary grating projected onto a rotating patterned disk.     

Time-sharing in rats: effect of distracter intensity and discriminability

Interruptions (gaps) and unfamiliar events (distracters) during a timed signal delay the timed response of humans and other animals. To explore this phenomenon, we manipulate the intensity of auditory distracters (Experiment 1), and we dissociate the role of distracter intensity, distracter similarity with the intertrial interval, and dissimilarity from the timed auditory signal (Experiment 2). When the intertrial interval and the timed signal were silent, the delay in response after an auditory distracter increased with its intensity: Rats ignored (ran through) a 40-dB distracter, stopped timing during a 75-dB distracter, and reset after a 100-dB distracter. However, when timing was signaled by a 70-dB noise, rats reset both for 40- and 100-dB distracters, stopped for both 55- and 85-dB distracters, and run for the 70-dB distracter. Data are accounted for by a time-sharing model assuming 2 concurrent processes-time accumulation and memory decay controlled by the discriminability of the interrupting event-whose interplay results in a continuum of responses, from run to reset.     

Perceptual style and behavioral pattern of individuals with functional gastrointestinal disorders.

The present research examined the perceptual style and coping pattern characterizing individuals with functional gastrointestinal disorders. A matched case-control design was adopted to compare differences among the target group of individuals with functional gastrointestinal disorders (n = 40), a pain control group of individuals with rheumatism (n = 40), and the community control group of healthy individuals (n = 40). Perceptual style was measured by both monitoring and blunting responses to hypothetical stressful situations, and coping pattern was measured by the use of coping strategies in real-life stressful events. Results revealed that participants with functional gastrointestinal disorders differed from their healthy and rheumatic counterparts in having higher monitoring and lower blunting scores and using action-oriented coping strategies regardless of the controllability of stressful situations.     

The relation between rumination and temporal features of emotion intensity

Intensity profiles of emotional experience over time have been found to differ primarily in explosiveness (i.e. whether the profile has a steep vs. a gentle start) and accumulation (i.e. whether intensity increases over time vs. goes back to baseline). However, the determinants of these temporal features remain poorly understood. In two studies, we examined whether emotion regulation strategies are predictive of the degree of explosiveness and accumulation of negative emotional episodes. Participants were asked to draw profiles reflecting changes in the intensity of emotions elicited either by negative social feedback in the lab (Study 1) or by negative events in daily life (Study 2). In addition, trait (Study 1 & 2), and state (Study 2) usage of a set of emotion regulation strategies was assessed. Multilevel analyses revealed that trait rumination (especially the brooding component) was positively associated with emotion accumulation (Study 1 & 2). State rumination was also positively associated with emotion accumulation and, to a lesser extent, with emotion explosiveness (Study 2). These results provide support for emotion regulation theories, which hypothesise that rumination is a central mechanism underlying the maintenance of negative emotions.     

The relation between category and magnitude estimates of tactile intensity

The effect of various types (sandpaper, spoke, spiral, and white) and speeds (0, 1/2, 3, 6, 12, and 30 rpm) of rotating disk backgrounds upon 276 Ss’ estimates of the apparent verticality of a line moved toward physical verticality in either a clockwise or counterclockwise direction was investigated. The general finding was that the estimate of verticality was displaced away from pretest judgments in the direction of the disk rotation. The speed of rotation was significant with maximal vertical displacement at 6 rpm. The direction of line movement was significant with the result that maximal vertical displacement occurred when the line was moved in opposition to the direction of disk rotation. The type of disk employed made a significant difference in the estimates only when the line movement was opposite from the direction of disk rotation. Disks with inadequate stimulus contours (white) produced no significant effect. Results are discussed in terms of stimulus contour and ocular torsion.     

Aggression as a function of the intensity and pattern of attack

Forty Ss competed with an opponent in a reaction time task to avoid receiving shock. The opponent provided either consistently high intensity attack, increasing, decreasing, or consistently low attack. The S's shock settings for the opponent on each trial and ratings of the opponent after the task served as dependent measures. High intensity attack resulted in high intensity counterattack and negative ratings of the opponent. Low intensity attack resulted in low intensity counterattack and relatively positive ratings for the opponent. Decreasing attack resulted in decreasing counterattack and positive ratings of the opponent. Increasing attack resulted in increasing counterattack and comparatively high aggression ratings of the opponent.     

A note on the relation between area and intensity in taste

Taste thresholds as a function of area previously published [Hara, 1955) are reanalyzed and found to be described better by the hyperbolic relation C×Aⁿ=k than an exponential equation. The exponent. n, and the constant, k, were found to differ among taste compounds.     

Suicide and attempted suicide: their relation to subjective social stress indicators

We investigated the relationship between the subjective perception of external stress and suicidal behavior, using a stress model which indicated that the probability of suicide and attempted suicide, as a reaction to stress, increases when social support systems fail or malfunction. We conceived the subjective perception of social stress as expressions of worry or dissatisfaction regarding cardinal life domains such as economic, security, or political situations. We defined support systems in terms of national solidarity expressed as positive (or improved) attitudes regarding the relations between various segments of the population, and we derived the data regarding the subjective indicators from continuing surveys of representative samples of urban Israeli population during the years 1967 through 1979. Eight stress indicators and three solidarity indicators were included, and our findings generally supported the theoretical model. However, the findings regarding men conformed best in relation to suicide, whereas those regarding women confirmed the theoretical model mainly in relation to attempted suicide. Contrary to the model, female suicide rates decreased in times of stress. Feelings of social solidarity in the population were found to reduce suicidal behavior of both men and women.     

Magnetostatic Field Effect: Stress Syndrome Pattern and Functional Relation With Intensity

The stressing action of a medium-intensity, magnetostatic field was studied for several levels of intensity. Our purpose was (a) to verify a stressing action by display of the general adaptation syndrome Pattern on the growth rate of mice and (b) to establish the relation between effect and field intensity on the same variable. Eight groups of mice showed a linear relation. Moreover, stressing action was noticed at lower intensities than previously suggested.     

Hypoxic adaptation during development: relation to pattern of neurological presentation and cognitive disability

Children with acute hypoxic-ischaemic events (e.g. stroke) and chronic neurological conditions associated with hypoxia frequently present to paediatric neurologists. Failure to adapt to hypoxia may be a common pathophysiological pathway linking a number of other conditions of childhood with cognitive deficit. There is evidence that congenital cardiac disease, asthma and sleep disordered breathing, for example, are associated with cognitive deficit, but little is known about the mechanism and whether there is any structural change. This review describes what is known about how the brain reacts and adapts to hypoxia, focusing on epilepsy and sickle cell disease (SCD). We prospectively recorded overnight oxyhaemoglobin saturation (SpO2) in 18 children with intractable epilepsy, six of whom were currently or recently in minor status (MS). Children with MS were more likely to have an abnormal sleep study defined as either mean baseline SpO2 <94% or >4 dips of >4% in SpO2/hour (p = .04). In our series of prospectively followed patients with SCD who subsequently developed acute neurological symptoms and signs, mean overnight SpO2 was lower in those with cerebrovascular disease on magnetic resonance angiography (Mann-Whitney, p = .01). Acute, intermittent and chronic hypoxia may have detrimental effects on the brain, the clinical manifestations perhaps depending on rapidity of presentation and prior exposure.     

Sex of leader and subordinate role stress: A field study

This research examines the relationship between sex of leader and subordinate perceptions of two dimensions of role stress — role conflict and role ambiguity — as moderated by subordinate job level, age, and sex. Interaction effects for sex of leader also are investigated. Subjects are 184 supervisory and nonsupervisory employees of a psychiatric hospital. Results suggest that sex of leader does not significantly affect subordinate role conflict and role ambiguity. Most interactions were nonsignificant.     

The perceptual properties of electrocutaneous stimulation: Sensory quality,subjective intensity,and intensity-duration relation

A preliminary and two main experiments designed to examine the perceptual properties of electrocutaneous stimulation are reported. The stimuli used were single short pulses varying in intensity and duration. In Experiment 1, the exponents of power functions fitted to electrocutaneous magnitude estimation data were determined together with the sensory qualities induced by electrical stimulation. The results showed that there was no correlation between the exponent values and the sensory qualities. The mean exponent was 1.2. In Experiment 2, an intensity-duration trading function was constructed from the data obtained from identifying the induced sensory qualities. The results showed that the critical duration increases from 30 to 300 msec with increasing sensation level. These findings are compared with the properties of other sense modalities.