A review of psychophysiological research with hyperkinetic children

A number of studies have appeared which focus on the issue of whether hyperactive children are psychophysiologically different from normal children and what impact the stimulant drugs may have on psychophysiological characteristics of these children. The present paper reviews these studies under the type of measures that were employed. In general, the results suggest that hyperactive children are probably not under- or overaroused in their resting levels of autonomic functions, although some children may display resting cortical underarousal. However, the findings of studies on the impact of stimulation on autonomic or central functions intimate that some hyperactive children are probably underreactive to environmental stimulation, or are "underarousable." Indeed, where differences between hyperactive and normal children are found in such evoked-response studies, they are consistently in this direction of "underarousability." Results for the effects of stimulant drugs suggest that these drugs energize or increase the "arousal" of these children and enhance the impact of stimulation on the nervous system. The implications of these results for current theories of hyperactivity and for future research are discussed.     

The acute effects of caffeine on evoked response,vigilance, and activity level in hyperkinetic children

Seventeen hyperkinetic children who had previously responded to sympathomimetic amines were given three different dosages of caffeine in counterbalanced order (placebo, and low and high doses equivalent to one and three cups of coffee). One hour following ingestions they were tested, double-blind on measures of visual evoked response, alpha time, vigilance, and activity level. There was a significant effect on evoked response. The behavioral measures tended to be affected in a dose-related manner but not to a statistically significant degree. It is concluded that although centrally active, caffeine does not show the congruence between behavioral and central effects that other stimulants useful in behavioral management have shown.     

A dynamic extraversion model. The brain's response to a single dose of a stimulant drug

The aim of this paper is to present a mathematical dynamic modelling of the effect a stimulant drug has on different people which, at the same time, can be a useful tool for future brain studies. To this end, a dynamic model of the evolution of extraversion (considering its tonic and phasic aspects) has been constructed taking into account the unique personality trait theory and the general modelling methodology. This model consists of a delayed differential equation which, on one hand, considers that the active stimulus, a consequence of a single intake, is not constant; on the other hand, it contemplates that the state variable representing the phasic extraversion also represents the brain activation. The derivative of this state variable is calculated as the sum of the homeostatic control flow, the excitatory effect flow and the inhibitor effect flow. The solutions of this equation relate the tonic activation of an individual (that characterizes his or her personality) with his or her phasic activation level, whose evolution over time describes the organism's response to a single drug intake. These solutions quantitatively reproduce the predictions of current personality theories and anticipate vulnerability to drug misuse and addiction development.     

Anger control in response to verbal provocation: Effects of stimulant medication for boys with ADHD

Although stimulant medication reduces hyperactive children's aggression in naturalistic settings, stimulant effects on anger control have not been demonstrated. We therefore assessed the role of methylphenidate in enhancing response to verbal provocation from familiar peers and from role-playing adults. Twenty-four boys with attention deficithyperactivity disorder (ADHD), aged 6–12, received small-group cognitivebehavioral intervention in anger management skills. During posttraining assessments, the children were randomly assigned to placebo versus. 6 mg/kg of methylphenidate. In the peer provocations, methylphenidate enhanced self-control, decreased physical retaliation, and marginally increased the display of coping strategies. Medication and prompting were minimally beneficial in the delayed, adult-administered generalization assessments. Among the issues discussed are (a) differences between peer and adult provocation and (b) the roles of medication dosage and multimodality intervention for promoting socially competent behavior in children with ADHD.We gratefully acknowledge the Fernald Child Study Center of the University of California, Los Angeles, which provided major support for this research. In addition, we acknowledge the dedication of the small-group trainers, too numerous to mention individually, who led the intervention procedures for the children, and the experimenters who performed the individual provocation assessments. The careful behavior observations of Linda Douglas, Rebecca Eiser, Deborah Gibson, Mike Glenn, Melissa Michaelson, Jon Rafuse, Fauzia Simjee, Leslie Sherman, and Madelin Tundidor were central to the study. Finally, our colleagues Barbara Henker and Carol K. Whalen were instrumental in facilitating all aspects of this investigation.     

Stages in the psychological response to unemployment: A (dis)integrative review

There are widespread assertions in the literature on the psychological effects of unemployment that the response to job loss takes the form of qualitatively distinct stages or phases. This review gives an exposition of the main stage accounts, suggests reasons why such accounts appear compelling, and reveals what is entailed by the decision to hold such an account. When this is made clear the empirical evidence for a stage-by-stage account of unemployment experience is seen to be ambivalent at best. Most evidence is seriously flawed. Stage accounts are further criticized for inconsistency, internal contradictions, nonspecificity of domain, overindividualism, and restrictive ethnocentricity. It is suggested that evidence apparently supportive of stage accounts may be partly artifactual. Stage accounts are not recommended.     

The effects of stimulant drugs on curiosity behaviors of hyperactive boys

The curiosity behaviors of 20 hyperactive boys, both on and off stimulant drugs, and in relation to 20 nonhyperactive boys, were assessed. Comparisons on object, manipulative, conceptual, perceptual, and reactive curiosity tasks indicated that stimulants reduced only the object curiosity task performance of hyperactive boys, although the level tended to remain above that of nonhyperactive boys. Also, hyperactive boys both on and off drugs tended to have lower conceptual curiosity scores than controls. Implications are discussed.     

Relative efficacy of methylphenidate and behavior modification in hyperkinetic children: An interim report

Children reported to be hyperactive in school and with behavior difficulties at home were randomly assigned to methylphenidate, behavior therapy and placebo, or behavior therapy with methylphenidate for an 8-week period. Rating scales were obtained from teachers and parents. Independent blind observers rated childrens' classroom behavior on a weekly basis. A behavior therapy program was implemented in the home and at school. Methylphenidate dosage was individualized. Ratings of behavior deviance were significantly reduced by all treatments. However, a significant advantage for the groups receiving methylphenidate was found over the group receiving behavior therapy and placebo. No significant differences between methylphenidate alone and methylphenidate combined with behavior therapy were obtained. Global ratings of improvement done by teachers favored the combined treatment of behavior therapy and methylphenidate over behavior therapy and placebo. No differences among treatments were found in the mothers' global ratings of improvement. The results indicate that though all three treatments were effective, methylphenidate was significantly superior to behavior therapy alone.This study was supported in part by grant MH 18579, and by grant No. 3-621 from the Long Island Jewish-Hillside Medical Center. The authors wish to thank the behavior therapists, Drs. Jeffrey Felixbrod and Marion Pheterson, as well as Ms. Patricia Ramsey, who was responsible for data analysis.     

Emotional response to abortion: a critical review of the literature

Anti-abortion groups in the US cite the existence of a post-abortion syndrome--a sense of loss, emptiness, and grief similar to that reported by trauma survivors. Although research on the longterm effects of induced abortion is marred by methodological errors, most studies have found no adverse psychological sequelae; rather, there appears to be a sense of relief and opportunity for personal growth. Nevertheless, there is a small group of women who do experience emotional distress after abortion and it is important to identify the demographic, social, and psychological factors that place women at risk of such a reaction. In terms of demographic factors, young age (adolescence), low or nulliparity, 2nd-trimester procedures, and Catholicism have been characteristics of women who suffered post-abortion depression. Of the social variables that have been examined, a lack of support from significant others (parents or partner) has been linked in some studies to emotional distress after abortion. A relatively consistent finding is that women who feel coerced to abort or are ambivalent about their decision at the time of the procedure are most likely to experience regret, depression, and anger. Women whose coping style involves avoiding responsibility are also prone to post-abortion distress. As noted, the literature does not support the contention that abortion causes longterm trauma. On the other hand, given the fact that 1.5 million abortions take place each year in the US, the existence of some post-abortion distress in even as small percentage of acceptors is enough to indicate a need for pre- and post-abortion counseling to help women determine the meaning of the experience and own their decisions.     

Predicting intellectual outcomes: Sex differences in response to early environmental stimulation

Sex differences in parent-child interaction and infant development patterns were examined in a longitudinal sample of 193 parent-infant pairs. Few differences were found. However, there were differences in the patterns of prediction of later intellectual and linguistic outcomes for boys and girls. Stronger predictions of IQ or language skill were obtained for boys from measures of the mother's developmental expectations, the extent of the father's involvement in the infant's early care, the provision of appropriate play materials, and the extent of parental life change. Stronger predictions were found for girls for a measure of restriction and punishment. The combination of these two groups of findings — lack of difference on measures of environment and parent-child interaction, and the presence of differences in prediction — suggest that the same experiences produce difference effects for boys and girls.     

Predicting employee theft: A quantitative review of the validity of a standardized measure of dishonesty

One tool used in the preemployment setting for the prediction of theft is thePersonnel Selection Inventory (PSI) (London House, 1980). The PSI is a paper and pencil measure containing three scales: honesty, violence/emotional instability, and drugs. This paper focussed on the usefulness of the PSI dishonesty scale in the prediction of employee theft. Criterion-related validity data from 1,806 persons across 23 samples were quantitatively summarized. All samples met predetermined decision rules. The data indicated that the validity of the PSI dishonesty scale was dependent on a severity of consequences moderator. Validity coefficients are highest when the subject's responses are anonymous, when the theft criteria are self-report measures, when the subjects are students, and when the subjects are aware that the investigator has another source of information on their honesty. In all analyses, the validity of the PSI scale was found to be in useful ranges and showed little variance across studies.The opinions expressed in the report are those of the authors, and do not necessarily represent those of any organizations with which the authors are associated. This paper was neither sponsored nor endorsed by the Defense Personnel Security Research and Education Center. Reprints may be obtained from Michael A. McDaniel, Defense Personnel Security Research and Education Center, 99 Pacific Street, Building 455, Suite E, Monterey, CA 93940.     

Predicting from expressed vocational choice: a review

Information on the predictive validity of expressed vocational choice was gathered in a review of large-sample longitudinal studies. These results indicate that, in general, a person's expressed vocational choice predicts his future employment about as well as interest inventories or combinations of personality and background characteristics. Expressed vocational and educational field choices are moderately stable over one- to five-year periods during and after college. Difficulties and shortcomings in past research are discussed, and recommendations are made for future research on the predictive validity of expressed choice. Implications of these results for the practicing counselor are also considered.     

The triadic model as applied to the treatment of conduct-disordered children: A review and critique

Conduct-disordered behaviour in children has long been recognised as an area of particular concern for counsellors, clinical and educational psychologists and other professionals, especially given its widespread incidence and poor long-term prognosis. In response to this concern, one recent development in the field has been the use of an applied social learning theory approach, utilising a triadic model of intervention. Such a model, rather than working directly with the child, firmly locates the parent or other caregiver as the agent of change. This paper reviews critically the work which has been carried out under the broad rubric of the triadic model, addressing specifcally the short- and longer-term efficacy of such interventions. In addition, certain shortcomings and limitations in existing practice are identifed. It is argued that, in order to optimise the effectiveness of interventions, this will in many instances require a consideration of and work on parental well-being and self-esteem, the role of family dynamics and the influence of the social context.     

Waking ultradian rhythms of performance and motility in hyperkinetic and normal children

Waking ultradian rhythms in a visual performance task (detections and false positives) and in motility (global body movements and segmental limb movements during the task, and segmental limb movements during off-task periods) were examined in groups of nonmedicated hyperkinetic (HK) children (N = 11) and matched normal controls (N = 11). Testing was conducted for 5 minutes every 15 minutes (with 10-minute "rest periods") over a 6-hour period on 2 consecutive days. Increased limb movement (p less than .01) during off-task periods on both days. Increased limb movement in HK subjects during the task was marginally significant (p less than .06) on one day. False positives and global body movements failed to differentiate the groups. With regard to ultradian rhythmicity, some subjects in both groups showed evident ultradian peaks, which were present across a wide range of frequencies in one or more variables. There were no significant differences in the incidence of the period of evident ultradian peaks between the two groups.     

Planning in young children: A review and synthesis

Research on the development of planning is reviewed in the context of a framework that considers the role of three types of cognitive flexibility in planning development: event-independent temporal representation, executive function, and self-projection. It is argued that the emergence of planning abilities in the preschool period is dependent upon the development of event-independent temporal representation. Research on the development of executive function suggests that its sub-components, in particular inhibitory control, may be linked to developmental improvements on planning tasks. Recently, new paradigms have established that self-projection to the future appears to develop over the preschool period. We consider how these different forms of cognitive flexibility may themselves be related in development.     

Predicting the suicide rate of children in America

The time-series regressions for suicide rates by race and sex for those aged 5 to 14 years in the USA from 1933-1980 were predicted by scores on two factors which had high loadings for year and for the marriage rate.