Dichoptic interaction of visual structure and light flashes

Perceptual interaction between monocular flashes and different amounts of continuously visible target structure shown to the other eye was investigated. A response variable called dominance of the flashes is defined and found to be a direct function of flash intensity and an inverse function of contraocular target structure. The dominance variable is distinguished from subjective brightness of the flashes and subjective complexity of the targets. The observed effects are attributed to limited central processing capacity with increased informational load.     

The history of a catatonic dog

This article is a condensed life-history of a dog (“V3”) born and reared in the Pavlovian Laboratory and studied until his death in 1961. A detailed study was made of his pathologic development, his relations to people, and the effects of drugs. Measurements recorded were heart rate, blood pressure, respiration, 24-hour activity, sexual reflexes, general behavior. Although early experiments were done chiefly for recording and were not considered noxious or traumatic, this dog’s general development and symptoms seem to have been “constitutionally” rather than environmentally determined. His external behavior was strikingly similar to that of a catatonic patient-flexibilitas cerea, general immobility. Of particular interest was the “Effect of Person”: in the presence of all humans who confronted him he showed catatonic postures, cardiovascular disorders (tachycardia up to 200 beats/min., bradycardia to 12 beats/min., drop of blood pressure from 150 to 75 mm Hg, arrest of heart-beat for as long as 8 seconds), moribund poses. His response to drugs illustrated the specificity to a definite “constitutional type”: sexual activity markedly increased by alcohol and rarely present except after administration of alcohol; no improvement after administration of tranquilizers, except alcohol and meprobamate, which made him act like a normal dog in behavior and in relations to people. His symptoms and reactions to both people and drugs were generally opposite to those of another dog, “Nick”, studied over his life span: Nick showed excessive activity in physiologic systems; hyperactivity (running); generally, improvement through “Effect of Person”; sexual inhibition with alcohol. Observations of the two dogs suggest that symptoms as well as reactions to drugs are the result of the “type” rather than the procedure used, that perhaps psychopathologic symptoms are due more to inborn constitution than to “conflict” (“collision”) between excitation and inhibition, and that neurotic or psychotic symptoms may not interfere with longevity-Nick lived to be 14 years old and died fighting; V3, who also spent most of his life in the laboratory, died at the age of 14.     

Effects of naloxone and neuroleptic drugs on muscle rigidity and heart rate of the nervous Pointer dog

Muscle rigidity, a persistent physiological characteristic of the nervous Pointer dog, is not only attenuated by the major neuroleptic drugs, haloperidol and pimozide but also by naloxone. In addition, naloxone administration results in a modest but significant increase in heart rate of these subjects. The data obtained in this study add support for the concept that an abnormality in central nervous system dopaminergic function is involved in the genesis of abnormal behavior of this animal model.     

Values,expectations, and the prediction of social action: An expectancy-valence analysis

Two studies were conducted to test hypotheses about the relationship of values to action within the context of expectancy-valence theory. In these studies, university students who had previously completed the Rokeach Value Survey answered questionnaires that related to social movement organizations and that contained attitude items, expectancy items, and measures of willingness to assist these organizations. It was predicted that (1) value rankings from the Rokeach Value Survey will be systematically related to attitudes toward social movement organizations; (2) both attitudes and outcome expectancies (subjects' estimates of how helpful their action will be) will be correlated with measures of willingness to act on behalf of an organization; and (3) attitudes and expectancies will jointly account for more of the variance in action measures than either attitudes or expectancies can account for independently. Results showed that hypotheses were consistently supported across two measures of action, two contrasting organizations, hypothetical and actual commitments to act, and two subject samples. These results extend the scope of the expectancy-valence approach by incorporating general values (conceived as motives) into the analysis, and they have practical implications for social movement strategies.The authors gratefully acknowledge the assistance of John Mann and John Crosbie in compiling and analyzing the data reported here.     

Effective ministerial style as perceived by denominational leadership

Defining criteria for ministerial effectiveness has presented researchers with numerous methodological and definitional problems. Global measures of effectiveness lack the situational specificity necessary to be readily applicable to unique churches or congregations. This study compared the definition of effective ministerial style between denominational supervisors and senior ministers of the California-Pacific Conference of the United Methodist Church in an effort to see whether there were modal expectations for this particular group. Utilizing the Job Perception Inventory (John Thomas Group, 1986), 20 job performance variables were assessed. No significant difference was found between the profiles generated by the two groups. Both groups described the ideal ministerial style as that of a generalist, as opposed to a specialist, with a flexible leadership style, making extensive use of participation and direction. Further research is indicated. Finding a modal profile of performance expectations makes it possible to determine whether the effectiveness of individual pastors is a function of their identification with these criteria.     

Peer-Initiated Motivational Climate and Group Cohesion in Youth Sport

The purpose of the present study was to examine the reciprocal relationship between peer-initiated motivational climate and group cohesion. Measures of peer climate and cohesion were completed across the first half of a competitive season. Controlling for early season perceptions of the dependent variables, hierarchical regression results from 189 participants revealed that early season ego-related climate negatively predicted task cohesion near midseason (p <.01), and task cohesion at early season positively predicted task-related climate at midseason (p <.01). The current study offers preliminary insight into the direction of the relationships between the two constructs in competitive youth sport.     

Counselling Australian baby boomers: examining the loss and grief issues facing aging distance-separated sibling dyads

It has long been recognised that mature-aged sibling dyads provide each other with emotional support. What has yet to be determined is whether this support function is maintained within the baby boomer generational cohort of sibling dyads who through economic relocation/migration have become separated by distance. As such, this paper highlights the need for research to be conducted into the experiences of baby boomers dealing with sibling loss and grief-related issues without the support of their nuclear and extended family members.     

Pre-training to find a hidden platform in the Morris water maze can compensate for a deficit to find a cued platform in a rat model of Parkinson's disease

The bilateral intranigral infusion of 1 micromol 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) in adult male Wistar rats caused a specific and partial loss of substantia nigra pars compacta (SNc) dopamine neurons, a partial depletion of striatal dopamine, and a deficit to learn the intra-maze cued version of the Morris water maze. Pre-training the SNc rats in the spatial version of the water maze or simply maintaining the animals on the water maze platform reversed this deficit. This improvement was even observed when the order of the extra-maze cues presented to the rats during pre-training of the spatial version was changed during training of the intra-maze cued version. However, this deficit was not reversed either by maintaining the animals on the platform if the spatial cues were surrounded and covered with a curtain or by swimming sessions in the maze without the escape platform and the curtain. These findings suggest that none of the following elements alone, learned during the spatial task pre-training, could help SNc rats learn the intra-maze cued task: improvement of swimming skills or knowledge of the existence of the escape platform; distance between the platform and the border of the pool; location of a particular extra-maze cue; relations among extra-maze cues. However, the simultaneous presence of the escape platform and extra-maze cues (irrespective of their relational configuration) during the pre-training sessions proved to be necessary for this improving effect to occur.     

Going home: the complex effects of reunification on internalizing problems among children in foster care

When children in foster care are reunified with their families of origin they encounter changes that may influence their well-being in both positive and negative ways. We examined the effects of reunification among 218 children in foster care to test an integrative model of the effects of reunification using structural equation modeling. We hypothesized that reunification would exert indirect effects on subsequent child adjustment via changes in adverse life events, perceived social isolation, and mental health service utilization. Results indicated no direct effect of reunification on subsequent internalizing problems, but reunification was related to increased adverse life events that, in turn, were related to elevated symptoms. Second, reunification was negatively associated with mental health service use. Finally, reunification was associated with decreased child perceptions of social isolation. In summary, reunification with biological parents is associated with multiple environmental changes, with most but not all effects indicating negative consequences.