Varying reinforcement magnitude on interval schedules

In Experiment 1, rats were trained on either a random-interval or a variable-interval 60-sec schedule of reinforcement, and reinforcement magnitude was varied across conditions between one and four pellets. Although the two schedules maintained different patterns of behaviour, patterns and rates of responding were not systematically affected by the variation in reinforcement magnitude. In Experiment 2, a regulated probability interval schedule that generated similar rates of reinforcement to those of the schedules of Experiment 1 was used, with the pattern of behaviour generated resembling that typical of a random-interval schedule. Changing reinforcement magnitude again produced few systematic changes in behaviour. In Experiment 3, a variable-ratio schedule was used within a procedure that otherwise resembled that of Experiments 1 and 2. Increasing the reinforcement magnitude now decreased the rates of responding, and examination of the patterns of responding showed that this came about because rates of responding were higher early in the interreinforcer interval in the one-pellet condition. These experiments demonstrate the insensitivity of behaviour under interval schedules to changes in reinforcement magnitude and suggest the operation of mechanisms different from those engaged by ratio schedules and discretetrial learning procedures.     

The Distillation of “VISCI”: Towards a Better Identification of Suicidal Inmates

The “Viennese Instrument for Suicidality in Correctional Institutions” (VISCI) presented here is based on the results of a large case‐control study and on research on literature examining suicide prevention in general and in the prison population in particular. The aim of this study was to validate the properties of the VISCI to differentiate between suicides and nonsuicides. The sensitivity and specificity of the VISCI was tested in the files of 55 correctional suicides, and 110 controls. VISCI differentiated well between suicides and nonsuicides. The routine administration of the VISCI may help to direct the existing professional attention to inmates with the highest need.     

Perceptions of Sexual Harassment as a Function of Target's Response Type and Observer's Sex

Although research has investigated definitionsand prevalence of sexual harassment, little is knownabout responses to sexual harassment. Therefore, thepresent study was designed to explore how individuals interpret the communication of various targetresponses. One hundred and twenty employees fromhealthcare settings were randomly assigned to one offour conditions. The majority of the individuals in the sample was White-European American (75%) whilethe remaining 25% was comprised of minority members. Theconditions contained a video-taped interaction betweentwo co-workers, one male and one female. The male's behavior in each interaction continuedto escalate to the point of sexual harassment while thefemale's responses varied. There were two passiveresponses and two assertive responses. After viewing the short video participants responded toquestions assessing their perceptions of theinteraction. Results indicated there were no differencesin perceptions between men and women when viewing thevarious conditions. There were, however, differencesfound between the assertive conditions and the passiveconditions. Specifically, assertive responses areperceived as more effective than passive responses in communicating unwelcomeness and in deterringthe initiator's persistence. However, consistent withthe research on responses to sexual harassment,perceptions of sexual harassment appear to be based more on the initiator's behavior than on thetarget's responses.     

Property,Possession and Permanence: A Field Study in Human Territoriality1

The relationship between the “permanence” of a person's occupancy of a place and his territorial behavior were tested in a field setting. The permanence (past residence and anticipated future residence) of suburban residents who displayed territory defenses was compared to that of control residents who had no such displays. It was found that people who had visible territorial displays on the property showed greater permanence in attachment to the property and responded more rapidly to the presence of an outsider on their property. Results were discussed with reference to the functional implications of territoriality in communities.     

Public Attitudes Toward the Trustworthiness, Competence, and Altruism of Twenty Selected Occupations

Ratings on 4-point scales of truthfulness, competence, and altruism of 20 selected occupations were obtained from 4 samples of subjects. The subjects included 200 students from the University of Connecticut, 96 students from the University of Maryland, 50 secretaries from a small town in Connecticut, and 50 teachers from the public schools of the same town. In spite of differences in sex, age, occupation, education, and locale, all the samples and subsamples were remarkably similar in their ratings of the 20 occupations. A strong tendency appears for professionals to be rated high and for people who may be regarded as powerful in our society to be rated poorly on all 3 variables. Several interesting differences in ratings on the 3 variables within professions were obtained.     

Localization of a peripheral target during parametric adjustment of saccadic eye movements

The aim of the experiment was to find out whether saccadiceve movements have any effect on perceived visual directions. ihe method was to alter the parameters of the oculomotor system so that the eye movement made in response to a peripheral target was inappropriate to the retinal locus of its image. It was found that this procedure had no effect on the perceived location of the peripheral target; and it was concluded that a specific retinal locus is more or less rigidly associated with a corresponding visual direction, but not with a particular magnitude of ocular rotation.