INTERINDIVIDUAL DIFFERENCES IN CATECHOLAMINE EXCRETION DURING STRESS

Measurements of adrenaline and noradrenaline excretion during inactivity and stress, and ratings of 22 personality variables were obtained for 110 subjects. Six factors were extracted by a factor analysis. Two of the factors were associated with personality variables, three primarily with catecholamines, and one with both types of variables. The 'mixed.' factor was tentatively interpreted as indicating that individuals with depressive tendencies respond to stressors with a relatively smaller rise in adrenaline excretion. This finding is in line with current theories concerning the role of catecholamines in affective psychoses.     

STRESS AND PERFORMANCE: EFFECTS OF SUBJECTIVE WORK LOAD AND TIME URGENCY1

Subjective work load, time urgency, and other stress/motivation variables were measured for management personnel taking a demanding problem-solving exam at the end of a two-week training course. Comparing measures of precourse ability and final exam performance, the primary findings were that the corrected performance scores had strong negative linear (not inverted-U) relations with both subjective work load and time urgency. General state anxiety and task involvement did not substantially relate to performance. The results are discussed in terms of the nature of this particular task and the predictions of various stress/performance theories. In problem solving or other tasks requiring novel responses, these data suggest that increases in psychological stresses like subjectively high work load and time urgency uniformly impair performance across the whole range of these variables.     

CATECHOLAMINE EXCRETION IN YOUNG CHILDREN AND THEIR PARENTS AS RELATED TO BEHAVIOR

L ambert , W. W., J ohansson , G., F rankenhaeuser , M. & K lackenberg -L arsson , I. Catecholamine excretion in young children and their parents as related to behavior. Scand. J. Psychol ., 1969, 10, 306–318. — Catecholamine excretion in 100 children and their parents was examined in relation to the children's behavior and to data on the parents' disciplinary procedures: ( a ) children's adrenaline excretion was positively correlated with their intellectual level, ( b ) their noradrenaline excretion was positively correlated with that of their mothers, as well as with both parents' age at the birth of the child, ( c ) mothers' adrenaline excretion was positively correlated with the frequency at which the fathers punished their children by smacking, and ( d ) fathers' noradrenaline excretion was negatively correlated with their own as well as with their wives' frequency of smacking their children.     

LONGITUDINAL STUDY OF PROCRASTINATION, PERFORMANCE, STRESS, AND HEALTH:

Abstract— Procrastination is variously described as harmful, innocuous, or even benefical. Two longitudinal studies examined procrastination among students. Procrastinators reported lower stress and less illness than nonprocrastinators early in the semester, but they reported higher stress and more illness late in the term, and overall they were sicker. Procrastination thus appears to be a self-defeating behavior pattern marked by short-term benefits and long-term costs.     

SUBJECTIVE TIME AS AFFECTED BY GRAVITATIONAL STRESS

Subjective time as affected by positive radial acceleration in a human centrifuge was studied by a modification of the method of ratio production. Auditory signals (1–20 sec.) were used as stimuli. The results showed a marked change in subjective time during gravitational stress. Subjective time, as measured by the methods employed, was a positively accelerated function of objective time and the positive acceleration was enhanced during centrifugation. The demonstrated change in time experience was caused by a difference in retention of preceding time intervals, retention being impaired during centrifugation.     

OBJECTIVE AND SUBJECTIVE PERFORMANCE AS INFLUENCED BY DRUG-INDUCED VARIATIONS IN ACTIVATION LEVEL

Performance was measured by seven sensorimotor and perceptual tests given to 30 students in six successive trials, spread over five hours, before and after the intake of either 15 mg dexamphetamine, zoo mg Pentobarbitone, or a placebo. Subjective performance, level of aspiration, wakefulness, and mood were measured by a scaling method. A close agreement was found between the amount of objective and subjective improvement following dexamphetamine, whereas the objective impairment induced by Pentobarbitone was not reflected in the subjective measures. These results were examined in relation to the other indices of activation.     

ON THE INTERCHANGEABILITY OF OBJECTIVE AND SUBJECTIVE MEASURES OF EMPLOYEE PERFORMANCE: A META-ANALYSIS

A meta-analysis of studies containing both objective and subjective ratings of employee performance resulted in a corrected mean correlation of .389. This value, although significantly greater than zero, indicates that objective and subjective performance measures should not be used interchangeably. Moreover, in no moderator subgroup examined did the correlation suggest convergent validity. After discussing issues related to resolving the previous anomalies of primary and meta-analytic results, a secondary analysis suggested that objective and subjective measures of the same construct at the same level may be used inter-changeably. The secondary analysis, however, was based on a very limited sample. Future research should address the appropriate dimensionality of employee performance.     

TRACKING PERFORMANCE UNDER THREAT-INDUCED STRESS

Operator tracking performance in 3 simulated guided missile systems was studied under short-term psychological stress induced by threatening with and also delivering unpleasant electric shocks. The initial part of the stress period was characterized by a moderate decrement of performance and a heightened arousal level, which is regarded as a partial confirmation of the activation theory. The results may also be interpreted in terms of a simple stress-over-time model, based on a hypothetical interaction between arousal and habituation.     

A COMPARISON OF VALIDATION CRITERIA: OBJECTIVE VERSUS SUBJECTIVE PERFORMANCE MEASURES AND SELF- VERSUS SUPERVISOR RATINGS

This study compared four criteria–two objective (production quantity and production quality) and two subjective (supervisor and self-ratings)–for their predictability in a criterion-related validity study. Results from this sample of 212 maintenance, mechanic, and field service workers replicated previous meta-analytic results with clerical workers (Nathan & Alexander, 1988); supervisor ratings and objective productivity indices provided similar and significant validity coefficients with a unit-weighted composite of five cognitive ability tests. The objective quality index and employee self-ratings resulted in near zero correlations with the same predictor battery. Additional productivity and quality objective criterion data were available for 2 years since the original validation study; no change in validity was found.     

SUBJECTIVE CULTURE,SELF-CONCEPT AND THE SOCIAL ENVIRONMENT1

A côté des attitudes, rôles, normes et valeurs, le self-concept ou image que l'on se forme de soi-même, est l'un des éléments caractéristiques d'un groupe culturel. Cette image de soi a été étudiée de façon détaillée chez des étudiants américains et français par une méthode visant à déterminer l'identité sociale d'un groupe par sa réaction aux stimuli “Nous les X… “et” Eux les X…”. Différents niveaux d'analyse ont permis de dégager certaines particularités de l'image de soi des Français et Américains et ont fait apparaître, notamment, que l'idéologie politique de ces étudiants est une variable importante dans la détermination de l'identité sociale.     

SUBJECTIVE TEMPORAL DISTANCE AND EMOTIONAL INVOLVEMENT

BRATFISCH, O., EKMAN, G., LUNDBERG, U., and KRÜGER, K. Subjective temporal distance and emotional involvement. Scand. J. Psychol. , 1971, 12, 147–160. –Three experiments were conducted in which subjects were required to estimate the subjective temporal distances of various historical periods, each of which was named after some person, event, or social process. In all, 65 subjects participated. In related experiments the same subjects estimated their degree of emotional involvement in what might have happened to people living during the various periods named. Using the actual dates when the events took place, the relation between objective and subjective temporal distance was found to be described by a simple power function. Emotional involvement was shown to be inversely related in a simple monotonic manner to both subjective and objective temporal distance, when other variables were so far as possible held constant. A number of different alternative power functions as well as an exponential and a logarithmic function were fitted to the empirical data. A specific type of power function with three empirical constants and a simple exponential function were found to describe experimetal data to a good approximation.     

SUBJECTIVE CULTURE AND ECONOMIC DEVELOPMENT1

L'examen critique de la littérature traitant du développement économique, de ses causes et conséquences, des variables psychologiques qui l'induisent ou le favorisent, fait apparaître la modernisation comme un phénomène complexe dont la mesure se révèle malaisée. On peut certes identifier une dimension psychologique universelle, cognitive et motivationnelle — le modernisme — qu'il est possible de mesurer au moyen d'une échelle appropriée. Mais se limiter à ce point de vue conduirait immanquablement à méconnaître la complexification imposée à cet état psychologique par la culture, le milieu, etc. c'est pourquoi, des mesures de variables composant la culture subjective peuvent fournir des indices supplémentaires, susceptibles d'éclairer le ou les processus de modernisation et de clarifier les relations entre ce phénomène, les facteurs qui le conditionnent et les conséquences qu'il entraîne. On voit dès lors l'intérêt que présente ce type d'analyse pour des problèmes tels que celui de la planification optimale de la vitesse de modernisation ou encore celui des relations entre modernisation et hygiène mentale.     

TIME RELATIONS OF OBJECTIVE AND SUBJECTIVE REACTIONS TO D-AMPHETAMINE AND PENTOBARBITONE

Successive measurements of pulse rate, blood pressure, objective and subjective reaction speed, and six mood variables were made on 12 healthy subjects during 135 min. periods following the intake of either 15 mg d-amphetamine, 200 mg Pentobarbitone, or a placebo. It was shown that (1) the two drugs had essentially opposite effects on all objective and most subjective variables; (2) after d-amphetamine subjective effects appeared earlier and reached their maximum more rapidly than objective effects; (3) both types of reaction were less pronounced after Pentobarbitone than after d-amphetamine under the present dose conditions; and that (4) after Pentobarbitone maximum objective effects were attained at an earlier point in time.