Escalation of irritable aggression: Control by consequences and antecedents

Two experiments demonstrated that rats could be trained in a negative reinforcement paradigm to display a shock-induced aggressive response on the first shock presented. Later, rats that had been submitted to the negative reinforcement training procedure displayed more shock-induced aggression than did control groups during a test session that was situationally different from the one used during training. A third experiment demonstrated that noxious antecedent events, if presented with sufficient rapidity, can combine to increase the probability of aggressive behavior. The three experiments together suggest that aversive antecedents and reinforcement contingencies could be involved in the escalation of irritable aggression.     

The social and cultural roots of political violence in Central America

The paper suggests that there are specific features of violence, both personal and organized that have roots in the cultural formation of the Central American peoples. Its focus is on the three neighboring countries of Guatemala, Honduras, and El Salvador and on the ideological violence of the twentieth century. The paper considers various aspects of the social character of the Spanish Americans of this area, their concepts of manliness, and their religion, as these affect both rich and poor, and contrasts these features with the attitudes of the indigenous Indian community. Having established that political violence is endemic in the region, the paper considers the role of Hispanic culture in shaping this violence. Emphasis is placed on the notion of machismo, which is identified not with pleasure seeking but with defiance of death. The attitudes of the people of this area toward death shape their attitudes toward violence. They are shown to have a fascination with the instruments of death, especially the machete among the lower classes and the gun among the university students. These attitudes are contrasted with the relatively non-violent attitudes of the Indians. The studies cited in this paper show the Indians as less interested in competition and aggression that the Hispanic population. In the last analysis, the violence of the Central American is intensely personal and can be shown to derive from the basic social and cultural fabric of the society.     

Mother-child interactions in ADHD and comparison boys: Relationships with overt and covert externalizing behavior

Reciprocal relationships between child characteristics and such familial factors as parental psychopathology and interaction style with the child characterize the development and maintenance of attention-deficit hyperactivity disorder (ADHD) as well as its comorbidity with antisocial behavior. Our goal was to ascertain the ability of negative maternal behavior exhibited during mothers-on interactions to predict independently observed overt and covert externalizing behavior in the child, controlling for current maternal symptomatology and the boy's acting out behavior during the interaction. Participants were 49 boys with ADHD and 37 comparison boys, aged 6 to 12 years. Hierarchical multiple-regression analyses revealed that, even with maternal psychopathology and child negativity with the mother partialed, maternal negative behaviors predicted both observed noncompliance exhibited in class and play settings and laboratory stealing. Stealing was predicted from maternal negativity even with child interactional compliance controlled. Differential predictions of noncompliance were revealed in ADHD versus comparison families, yet similar patterns emerged for stealing within each group. Results are discussed in light of the high risk for antisocial behavior in ADHD children.This article is based, in part, on a doctoral dissertation written by Carolyn A. Anderson at the University of California, Los Angeles. The research received primary support from National Institute of Mental Health Grant 45064, awarded to Stephen P. Hinshaw. Partial support was received from the Fernald Child Study Center of the University of California, Los Angeles, where the 1990 summer research program was housed, and from a Faculty Research Grant to Stephen P. Hinshaw from the University of California, Berkeley. We express our deep appreciation to the many behavior observers and research staff, too numerous to mention individually, who were essential in collecting and coding the primary data for the study, and to the children and families who participated in the family assessments and summer research programs.     

Behavior analysis and the search for the origins of hypertension.

Hypertension is a disorder of sodium regulation that develops over time in a context of the interactions of the individual with the environment. Experimental hypertension can be induced in laboratory animals and normotensive humans via increases in sodium intake under conditions of aversive behavioral control. Readiness for avoidance contingencies includes a breathing pattern characterized by subnormal rate and normal tidal volume. Studies with humans have shown that this inhibitory breathing pattern is associated with increased plasma acidity, increased renal sodium reabsorption, increased secretion of digitalis-like hormones that inhibit sodium-pump activity, and increased vasoconstriction and blood pressure. Behavioral research is needed that defines the necessary and sufficient conditions for inhibitory breathing and its role in the development of hypertension.     

Effects of two levels of procedural fidelity with constant time delay on children's learning

The purpose of this study was to compare the effects of constant time delay delivered with high procedural fidelity to constant time delay with high procedural fidelity on all variables except delivery of the controlling prompt (i.e., on a mean of 44% of the trials, the controlling prompt was not delivered when it should have been provided). Six preschool children with disabilities were taught to identify photographs in two alternating conditions (e.g., high procedural fidelity and low procedural fidelity). An adapted alternating treatments design was used to evaluate the instructional conditions on the effectiveness and efficiency of instruction. In addition, daily measures were taken of the teacher's implementation of each step of the constant time delay procedures which indicated that the two conditions were implemented as planned. The results indicate that both conditions were effective for four children; for three of these, the high procedural fidelity condition resulted in more efficient learning. For the fifth child, the high-fidelity condition resulted in criterion level responding, but the low fidelity condition did not. However, when the high fidelity procedure and trial-by-trial reinforcement were used for the low-fidelity stimuli, these also were acquired. For the sixth child, neither procedure was effective; thus, the high fidelity condition was used alone and resulted in learning. The results are discussed in terms of using the constant time delay procedure and studying the procedural fidelity of other strategies.