Relationship between perceived job stress and physical and psychological strain among university administrators

The relations between eight job stresses and symptoms of physical and psychological strain were examined among 56 university administrators. Only three of the 16 stressor-strain correlations were significant, suggesting that stress is weakly related to individual strain in this sample.     

Song repertoire development in male cowbirds (Molothrus ater): its relation to female assessment of song potency

Two studies were conducted to investigate the relation between the male cowbird's (Molothrus ater ater) development of a song repertoire and the female cowbird's assessment of song potency. Male development was assayed by vocal copying and female assessment by copulatory responsiveness to song playback. The results demonstrate that males do not copy most often the particular songs that females respond to most often. Whereas rank orderings of potency were highly correlated across two independent samples of playback females, male and female rank orderings were not significantly correlated. The data highlight the potential significance of social interactions between and across the sexes for repertoire development.     

Humans' sensitivity to variation in reinforcer amount: Effects of the method of reinforcer delivery

Two experiments examined human subjects' sensitivity to variation in reinforcer amount under different methods of reinforcer delivery. Subjects chose between schedules varying in terms of amount and/or delay of reinforcement, the reinforcer being points exchangeable for money. In Experiment 1, reinforcer amount was manipulated by varying the monetary value of the points across conditions while the number of seconds of access to a consummatory response remained constant. Choice was strongly sensitive to reinforcer amount and indicative of self-control, as in previous experiments. In Experiment 2, reinforcer amount was manipulated by automatically delivering different numbers of points during the amount period, and the consummatory response was eliminated. Sensitivity to variation in reinforcer amount was significantly lower than in Experiment 1. Furthermore, the subjects in Experiment 2 exhibited significantly less self-control than did the subjects in Experiment 1. Humans' sensitivity to variation in reinforcer amount appears to be affected by factors that enhance the discrimi-nability of the consequences of responding.     

Religious and therapeutic elements in Sufi teaching stories

Like the teaching stories of many other religions—the parables of Jesus, Zen koans, Hasidic tales—the stories of the Sufis, or Islamic mystics, offer important insights into the nature of religious experience and emotional well-being. This paper discusses the comments of selected Sufi tales on the basic structure of situations, non-rational or lateral problem-solving techniques, the process of consciousness-raising, and the experience of confronting unexpected reality.     

Choice in a self-control paradigm with human subjects: Effects of changeover delay duration

The present experiment examined the choices of human subjects as a function of changeover delay (COD) duration. A self-control paradigm was used; subjects chose between larger, more delayed and smaller, less delayed reinforcers. The COD durations were 1 s, 15 s, and 30 s. The results indicated that at the 1-s COD, the subjects distributed their responses approximately equally between the two response alternatives. However, at the 15-s and 30-s COD durations, the subjects tended to demonstrate virtually exclusive preference for the larger, more delayed reinforcer. Furthermore, increasing the COD duration significantly increased the subjects' sensitivity to variation in reinforcer delay. Increasing the COD duration also increased the subjects' sensitivity to reinforcer amount, but this effect was not significant. The results are qualitatively consistent with an interpretation that the subjects followed a strategy which attempted to maximize overall amount of reinforcement.     

Social metrics of song learning

Five metrics of song learning are described for brown-headed cowbirds (Molothrus ater). The intent of these metrics is to capture not only the behavior of the song learner but the social context in which song learning occurs. Playback procedures, observations of mating, and acoustic and functional assessment of song content are combined to yield measures of song potency, functional validity, social dynamics, vocal flexibility, and social reactivity. Taken as a whole, the results revealed by these metrics indicate that males learn to be effective singers by attending to the social consequences of their behavior.     

Conditioning of a free operant in Octupus cyaneus Gray

Operant conditioning was studied in six specimens of Octopus cyaneus Gray. An “arm-out-of-water” operant, in which the octopus inserted an arm up a feeding-tube breaking the water surface, proved susceptible to reinforcement schedules. An apparatus was developed that provided automated reinforcement and recording. Performance was studied under continuous reinforcement, fixed-ratio and variable-ratio schedules, and extinction conditions.     

The meta-ethical dimension of the problem of evil

Conclusion In addition to complexity deriving from the notion of the possibility of a better world, the anti-theist argument from evils may possess the appearance of greater effectiveness than critical analysis should recognize it. If the moral language employed in the argument is accepted according to some forms of emotive, intuitive or theonomous interpretations, the so-called problem will vanish - and the question of the existence or nonexistence of God (so far as it is thought to depend on this argument) will be found to be settled, or at least appear settled, on the grounds simply of the usages involved. If it is stated in utilitarian language, on the other hand, the problem of evil has the logical status of a genuine problem. Since we are to affirm that the question: Is it evil that there are evils? is a legitimate question, we shall do best, I believe, to interpret the question in utilitarian language. So interpreted, the problem is such that both the theist and anti-theist should have to work at proving their respective claims regarding the evils in the world. Whether either should ever succeed, it seems that the meta-ethician will profit by analyzing the language in which the attempt (more strenuous for the theist, I should think) will be made.     

Determinants of serial discrimination learning by squirrel monkeys

Squirrel monkeys were presented multiple serial discriminations 1, 2, 4, and 8 problems long. They were then presented problems designed to separate the effects of within-list associative interference from the effects of within-problem intertrial interval as list length was increased. The Ss committed consistently fewer errors after Trial 1 reward than after Trial 1 nonreward and showed strong stimulus perseveration. An increase in within-problem intertrial interval from 30 sec to 4 min had no effect whereas the associative interference resulting from increased problem length caused a small but significant performance decrement. Old and new problems had about equal effects on serial discrimination. The findings indicated that squirrel monkeys are relatively insensitive to within-problem associative interference.