Physiologic and motor conditioning and generalization in children with minimal brain dysfunction

Twenty-six children diagnosed as having minimal brain dysfunctions (MBD) were compared with 26 controls in a conditinoing and generalization procedure. Skin resistance, heart rate, and muscle action potentials were monitored throughout. Success involved learning which of two tones signalled the accessibility of a penny. Whereas 92 per cent of controls reached the criterion of five successive correct responses, only 62 per cent of MBD’s did. Further, a third of the MBD’s were so maladaptive as to force procedural variations, while only a few minor irregularities occurred with the controls. Quality of performance was related to age, intelligence, and ability to discriminate and remember tones. Controls were more physiologically reactive than MBD’s, especially in skin resistance. Physiologic differentiation of the two tones was significant in both groups of children and appeared concurrently with motor differentiation. The only evidence of physiologic generalization was in the SR data of controls. The possibility that defective arousal structures, or defective coupling of arousal structures and other perceptual and motor structures, could account for the decreased physiologic reactivity, short attention spans, and poor concentration ofsome MBD’s is discussed. This research, in conformity with other laboratory studies of the brain, indicates that motivational as well as cognitive defects may be organically based.     

Factors Related to Reported Problems of Adolescents

A randomly selected group of 720 adolescents responded to the Mooney Problem Check List. The relationship between the problems reported for each of the 11 problem areas of the MPCL (dependent variables) and the 14 independent variables was analyzed statistically by employing the least-squares analysis of variance technique. This analysis yielded significant differences for 7 of the 14 independent variables. Possible implications of the findings of this study for educational planning are discussed, and recommendations made for a more comprehensive study of the problems of adolescents at the local level.     

Behavioral contrast as a function of the duration of an immediately preceding period of extinction

For four pigeons key-peck responding was reinforced on a variable-interval reinforcement schedule in the presence of a vertical white line. When response rates had stabilized a horizontal white line was introduced, in the presence of which reinforcement was not available (extinction). The horizontal line was presented once per session, immediately before the vertical line was presented. The duration of the horizontal line varied randomly from session to session, being either 0 sec (i.e., no presentation), 10 sec, 30 sec, 2 min, 10 min, 40 min, or 120 min. When the horizontal line was present for more than 0 sec, behavioral contrast was obtained in the presence of the following vertical line. Contrast increased with increasing durations of the horizontal line, asymptoting when the horizontal line was present for 40 min.     

Sex differences in cerebral laterality of language and visuospatial processing

Sex differences on language and visuospatial tasks are of great interest, with differences in hemispheric laterality hypothesized to exist between males and females. Some functional imaging studies examining sex differences have shown that males are more left lateralized on language tasks and females are more right lateralized on visuospatial tasks; however, findings are inconsistent. Here we used functional magnetic resonance imaging to study thirty participants, matched on task performance, during phonological and visuospatial tasks. For each task, region-of-interest analyses were used to test differences in cerebral laterality. Results indicate that lateralization differences exist, with males more left lateralized during the phonological task and showing greater bilateral activity during the visuospatial task, whereas females showed greater bilateral activity during the phonological task and were more right lateralized during the visuospatial task. Our data provide clear evidence for differences in laterality between males and females when processing language versus visuospatial information.     

Diagnostic accuracy and factor structure of the AAS and APS scales of the MMPI-2

Receiver operating characteristics analysis and sensitivity analysis were used to compare the diagnostic accuracy of the Addiction Acknowledgement Scale (AAS; Weed, Butcher, McKenna, & Ben-Porath, 1992) and Addiction Potential Scale (APS; Weed et al., 1992) of the Minnesota Multiphasic Personality Inventory-2 (Butcher, Dahlstrom, Graham, Tellegen, & Kaemmer, 1989) to that of the MacAndrew Alcoholism Scale-Revised (Butcher et al, 1989), the CAGE (Mayfield, McLeod, & Hall, 1974), and Svanum's scale (Svanum & McGrew, 1995) in a sample of 338 university students. The AAS was the most accurate of these 5 scales at identifying current alcohol dependence (as measured by a structured diagnostic interview) and appears to offer considerable promise as an alcohol screening instrument. In contrast, the APS performed the most poorly of the 5 scales being evaluated, yielding results that would be of minimal clinical utility. Factor analysis yielded a 2-factor solution for the AAS (Acknowledgement of Alcohol/Drug Problems; Positive Alcohol Expectancies) and a 4-factor solution for the APS (Satisfaction with Self; Cynicism/Pessimism; Impulsivity; Risk-Taking).     

Aggression,Psychopathology, and Intimate Partner Violence Perpetration: Does Gender Matter?

The majority of intimate partner violence (IPV) research explores partner violence without considering the influence of contextual and psychosocial factors, such as trait aggression, psychopathology, gender, and provocation. Disparities in the general aggression literature further underscore the need to develop a better understanding of contextual and psychosocial factors. The present study sampled 720 (male = 365, female = 355) college students who completed measures of IPV perpetration and victimization, trait aggression, and psychopathology. Participants then completed a learning task, during which half were randomly selected to be provoked. The interactive effects of condition, gender, and perpetrator status on mood and aggressive responding were explored. Results indicated that perpetrators of both genders had similar emotional responses to provocation, but behavioral responses to provocation varied. Results were discussed in terms of their implication for future research and batterer intervention.     

Promoting the Transition from Implicit to Explicit Understanding: A Training Study of False Belief

Ninety‐one children aged between 2;10 and 5;0 participated in a training study of false belief. Children were assigned to either an explanation condition, a practice condition or a control condition where children heard two stories unrelated to false belief. Children’s eye movements in anticipation of the protagonist reappearing were monitored at pre‐test. Only the explanation condition led to improvements in judgement and justification of a protagonist’s future action based on false belief. Children who looked in anticipation to where the protagonist thought the object was at pre‐test were more likely to give a correct judgement at post‐test than those who did not. Those children in the explanation group who gave a correct judgement at pre‐test were more likely to give an appropriate justification at post‐test than those who did not. Three main conclusions are drawn: (1) providing explanation about the underlying principles of a task is more likely to lead to improvements in performance than merely informing children of whether their response is correct; (2) the nature of improvements in performance will depend on the level of knowledge of the child at pre‐test; (3) training will only be beneficial for those children who demonstrate evidence of implicit understanding.     

Commitment to one’s spouse as a predictor of marital quality among older couples

The present study examined the relationships between several independent variables (ego development, commitment to the spouse, length of marriage, church attendance, and sex of subject) and three marital quality variables (marriage problems, expression of love, and dyadic adjustment) in a community sample of 72 married couples age 50 and up. Commitment to the spouse was the strongest and most consistent predictor of marital quality; commitment was negatively related to marriage problems and positively related to expression of love and dyadic adjustment. The other independent variables were generally unrelated to marital quality.     

A Method for Quantifying Human Relations,Hostility, and Anxiety Applied to TAT Productions

Fifteen well-adjusted couples and 15 poorly-adjusted couples produced joint stories in response to four TAT cards. The tape-recorded protocols were transcribed and content analyzed for three variables using the Gottschalk-Gleser Anxiety, Hostility Directed Outwards, and Human Relations Scales. As predicted, the average score on Human Relations for the well-adjusted group of couples was significantly higher than the average score on this scale for the poorly-adjusted group. The prediction of higher hostility on the part of the poorly-adjusted couples was likewise confirmed. No significant differences in anxiety between the two groups were found. Differences in the “pull” of the cards for the dimension of hostility and anxiety were reported.