Inhibitory stimulus control in concurrent schedules

Six pigeons were exposed to two keys, a main key and a changeover key. Pecking the main key was reinforced on a variable-interval 5-min schedule when the key was blue and never reinforced when the key displayed a vertical line on a blue background. Each peck on the changeover key changed the stimulus displayed on the main key. Each subject was given two generalization tests, consisting of presentations on the main key of six orientations of the line on the blue background, with no reinforcements being given. In one test changeover-key pecks changed the stimulus; in the other test the changeover key was covered and the experimenter controlled stimulus changes. Both responses to the six stimuli and time spent in the presence of the stimuli gave U-shaped gradients when the changeover key was operative. With most subjects, absolute rates of responding to each stimulus produced unsystematic gradients, whether or not the changeover key was operative.     

Depression in elderly persons and its correlates in family practice: a Canadian study.

Depression was studied in a Canadian community sample of 582 men and 906 women over the age of 65 years. The Center for Epidemiological Studies Depression Scale (CES-D) provided the measure of depressive symptomatology. The Diagnostic Interview Schedule was used to confirm clinical diagnosis. A total of 8% of the sample (4.3% of men and 10.4% of women) were at or above the cut-off point of 16 on the Depression Scale. Significant Pearson correlations with depression were found for gender and education. The married and never married persons showed low depression while the widowed, separated, or divorced appeared to be at high risk. The relationship of marital status to depression is primarily a woman's issue as most elderly men are married. This finding may have implications for policy and program planning for this population.     

The Tragic and Faith in Pastoral Counseling

This essay uses Edward Farley's notion of the interrelation of tragic vulnerability and creation and Niebuhr's idea of faith in offering a conceptualization of the process and goals of pastoral counseling. Openness, novelty, separation, and change, which characterize creative activity, give rise to anxiety, fear, and suffering as created entities seek to achieve their ends and needs amidst the limits of life. Faith as vital concern—defined as human and transcendent relations marked by reciprocal belief, hope, trust, and fidelity—is a response that represents participation and cooperation in creative activity with its concomitant anxiety and suffering. Pastoral counseling may be understood as an activity that facilitates a response of faith as vital concern. The process of pastoral counseling involves three essential and interrelated tasks. First, the counselor invites the person to experience present and past painful disappointments, losses, and betrayals. Second, the counselor invites the client to explore the types of trust and fidelity that are distorted and diminish his or her capacities for risking intimacy, spontaneity, and freedom. The third task is learning to recognize, contain, and work through the inevitable disappointments, broken promises, frustrations, and betrayals encountered in human relationships. Thus the work of pastoral counseling involves reciprocal experiences of belief, hope, trust, and fidelity, which provide the essential and necessary ground through which persons develop a) the capacities for and experiences of spontaneity, awe, and freedom, b) the ability to handle and work through experiences and perceptions of distrust and infidelity, and c) a sense of subjective and intersubjective identity, continuity, and cohesion.     

Contextual factors in neophobia and its habituation: The role of absolute and relative novelty

In four experiments we investigated the role of contextual cues in the habituation of neophobia in rats. Experiment 1 showed that the consumption of a novel flavour increased across a series of presentations in one context (A) but fell when the flavour was subsequently presented in a second, novel, context (B). In Experiments 2 and 3, subjects again received exposure to a flavour in context A, but also were familiarized with the test context, B. These subjects consumed the flavour with equal readiness, whether it was presented in Context A or in Context B at test. Experiment 4 replicated the results of Experiment 1 and also showed that the consumption of a novel flavour was not influenced by whether it was presented in a novel or a familiar context. Several mechanisms by which the novelty or familiarity of the context might interact with the novelty or familiarity of the flavour were discussed.     

Teaching chained skills in a non-school setting using a divided half instructional format

This investigation evaluated the use of dyadic instructional arrangements in teaching chained skills to four students with moderate mental retardation. Each instructional dyad consisted of two students. Each of the three cooking skills was divided into two equal parts, and each student in a dyad received direct instruction on one part of the task analysis during each instructional session. During the following session, the two parts were reversed and a student received instruction on the second part. A constant time delay procedure was used to teach the targeted skills in an off-campus setting. A multiple probe design across skills and replicated across students evaluated the effectiveness of the instructional procedure and teaching arrangement. Results indicate that each of the four students learned the three cooking skills. Implications for future research are discussed.     

The schedule dependency of the signaled reinforcement effect

In Experiment 1, rats leverpressed for food reinforcement on either a variable ratio (VR) 30 schedule or a variable interval (VI) 15-s schedule. One group in each condition received a signal filling a 500-ms delay of reinforcement. This treatment enhanced rates on the VR schedule, and attenuated rates on the VI schedule, relative to the rate seen in an unsignaled control condition. In Experiment 2 there was no delay of reinforcement and the signal and food were presented simultaneously. Attenuated rates of responding were observed on VI schedules with a range of mean interval values (15 to 300 s). Experiment 3 used a range of VR schedules (10 to 150) with simultaneous presentations of signal and food. A signal-induced enhancement of response rate was found at all VR values. In Experiment 4, a signal elevated response rates on a tandem VI VR schedule, but depressed rates on a tandem VR VI schedule, compared to control conditions receiving unsignaled delayed reinforcement. These results are taken to show that the effect of a signal accompanying reinforcement depends upon the nature of the behavior that is reinforced during exposure to a given schedule.     

Beliefs about female and male nonverbal communication

Participants (N= 441) rated from 1 to 10 how frequently or well they believed hypothetical women and men performed each of twenty nonverbal behaviors or skills. Women were believed to use more expressive and involved nonverbal behaviors than men, and to be more skilled at sending and receiving nonverbal messages. Men were believed to be louder and more interruptive, and to display more nervous, dysfluent behaviors. Ratings given to females by females were higher than were ratings in the other gender combinations for over half the variables, which may accurately describe female—female interaction. Perceived gender differences correlated positively with differences reported in observational studies, indicating that beliefs about nonverbal gender differences were generally accurate. The authors wish to thank Tom Leahy for his assistance in data collection.