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.     

Insensitivity to future consequences following damage to human prefrontal cortex

Following damage to the ventromedial prefrontal cortex, humans develop a defect in real-life decision-making, which contrasts with otherwise normal intellectual functions. Currently, there is no neuropsychological probe to detect in the laboratory, and the cognitive and neural mechanisms responsible for this defect have resisted explanation. Here, using a novel task which simulates real-life decision-making in the way it factors uncertainty of premises and outcomes, as well as reward and punishment, we find that prefrontal patients, unlike controls, are oblivious to the future consequences of their actions, and seem to be guided by immediate prospects only. This finding offers, for the first time, the possibility of detecting these patients' elusive impairment in the laboratory, measuring it, and investigating its possible causes.     

The envious will to power

Envy, from Klein's perspective, is an inherent hatred of goodness that seeks to destroy love, creativity, and life itself. Devoid of constructive value, envy becomes an evil to be restrained or renounced, rather than a potential to be understood or developed. Confusion with evil can be avoided if envy is seen as a defence against the impact of 'otherness' and the greatness of 'others' rather than an inherent hatred of goodness. From this perspective envy emerges as a desperate attempt to preserve one's unique sense of self against the terror of non-being.     

The effect of sampling error on convergence,improper solutions,and goodness-of-fit indices for maximum likelihood confirmatory factor analysis

A Monte Carlo study assessed the effect of sampling error and model characteristics on the occurrence of nonconvergent solutions, improper solutions and the distribution of goodness-of-fit indices in maximum likelihood confirmatory factor analysis. Nonconvergent and improper solutions occurred more frequently for smaller sample sizes and for models with fewer indicators of each factor. Effects of practical significance due to sample size, the number of indicators per factor and the number of factors were found for GFI, AGFI, and RMR, whereas no practical effects were found for the probability values associated with the chi-square likelihood ratio test.James Anderson is now at the J. L. Kellogg Graduate School of Management, Northwestern University. The authors gratefully acknowledge the comments and suggestions of Kenneth Land and the reviewers, and the assistance of A. Narayanan with the analysis. Support for this research was provided by the Graduate School of Business and the University Research Institute of the University of Texas at Austin.     

Parallel structure: A source of facilitation in sentence comprehension

Reading time for the second clause of a conjoined sentence was found to be faster when the clause was structurally similar to the first clause than when the clausal structures differed. This “parallel structure” effect was found for each of several types of structures, including active versus passive constructions, direct object versus sentential complement (minimal vs. nonminimal attachment), nonshifted versus shifted heavy noun phrase, agent versus theme, and animate versus inanimate noun phrase. The pervasiveness of the effect ruled out some hypotheses about its basis, including the hypothesis that it would occur only when a subject’s just having processed a structure would affect how temporary ambiguities are resolved. Detailed analysis of the data suggested the existence of several distinct sources of the effect and provided indirect evidence that people typically compute both a surface structure and an S-structure representation of a sentence.     

Systematic bias in successive movement repetitions

In three separate studies, independent groups of subjects made either 10 subjectively defined steps of the same length, 10 subjectively defined linear arm movements of the same extent, or 10 successive movements of a single experimenter defined linear arm movement. In each case, the repetitions of these movements became increasingly longer. This is an initial report of what may be a ubiquitous phenomenon.