Popularity, social acceptance, and aggression in adolescent peer groups: links with academic performance and school attendance

This article reports a short-term longitudinal study focusing on popularity and social acceptance as predictors of academic engagement for a sample of 342 adolescents (approximate average age of 14). These youths were followed for 4 consecutive semesters. Popularity, social acceptance, and aggression were assessed with a peer nomination inventory, and data on academic engagement were obtained from school records. For adolescents who were highly aggressive, increases in popularity were associated with increases in unexplained absences and decreases in grade point average. Conversely, changes in social acceptance were not predictive of changes in grade point average or unexplained absences. These results highlight the importance of multidimensional conceptualizations of social standing for research on school adjustment during adolescence and emphasize the potential risks associated with popularity.     

Human patellar reflex and conditioned reflex compared electromyographically

Inspite of continued work on the stretch reflex and “voluntary” movement study of the conditioned stretch reflex declined early in this century. The present experiments surveyed seven classical conditioning regimens for the human rectus femoris EMG seen after a blow to the patellar tendon. It was possible to (1) rule out conditioning to a knee touch that occured together with the tap, (2) establish weak conditioned stimulus, Sc, control for a tape recorder click and subsequent fist clench that preceded the tap by variable elapsed times, and (3) establish strong Sc control for a tone that sounded an invariant 0.27 sec before the tap. There were large differences, however, in Sc power across subjects, as measured by amplitude, latency, and frequency of conditioned EMG activity that occured prior to tap or when the tap was omitted. Purely reflexive responses, especially later EMG segments, also varied in amplitude and frequency, to support a conclusion that numerous controlling stimuli added or competed from trial to trial. Further disclosure of Sc contributions, including those from movement-generated stimulation, is warranted, especially for behaviors whose rhythmic timings, as in locomotion, might favor Pavlovian conditioning.     

Linear representation of temporal location and Stevens’s law

Ss were asked to indicate points 1 week, 7 months, 3 years, and 9 years in the past and future on two time lines representing birth to present and present to death. Data for 90 college-age Ss fit a psychophysical power function following Stevens’s law. with negatively accelerated growth indicating proportionately greater linear representation of periods nearer to the present. Variability was greater for the representations of the future than of the past, with monotonic increases in variability as distance from the present increased.     

Vibrotactile magnitude production scaling: A method for studying sensory-perceptual responses of stutterers and fluent speakers

The method of vibrotactile mangitude production scaling was used to determine the tactile sensory-perceptual integrity for the dorsum of the tongue and thenar eminence of the right hand for 10 fluent speakers and 10 stutterers. It was discovered that both groups performed the task in a similar manner for the thenar eminence of the hand (a nonoral structure) but in a dissimilar manner for the tongue (an oral structure). From these data, it is suggested that the stutterers may maintain a different internal sensory-perceptual process for the tactile system involved in the speech process. The possibility exists that stuttering, for some, may be an “internal disorder” of the tactile-proprioceptive feedback mechanism that is directly involved in speech production.     

Individual differences in the orienting response: Nonresponding in nonclinical samples

The complete failure of the electrodermal orienting response (OR), although widely studied in clinical samples, has received little systematic attention in work with healthy adults. The published studies of nonresponding using nonclinical samples are reviewed, with data from three unpublished studies pertinent to the question, to identify the characteristics of nonresponders. The most durable findings to date are that nonresponding shows both trait and state characteristics, and that nonresponders are more likely to be female than male, to show hypoarousal in the electrodermal system but not complete unresponsiveness in this system or low arousal in other systems, and to show higher scores on measures of impulsiveness and antisociality but not to differ from responders in terms of sensation seeking. Most of these data can be reconciled with two different accounts of the OR mechanism. One is that proposed by I. Maltzman which postulates a difference between voluntary and involuntary ORs, and the other is that of J. A. Gray which proposes that the OR is a function of activity in a Behavioural Inhibition System. Taken together, these accounts imply that the OR reflects attentional and affective processes, and that both cognitive style and temperamental differences in the appraisal of threat can lead to electrodermal nonresponding.     

A Systems Approach to Understanding and Improving Research Integrity

Science and Engineering Ethics - Concern about the integrity of empirical research has arisen in recent years in the light of studies showing the vast majority of publications in academic journals...