A Plexiglas helmet and catheter protection assembly for chronic intravenous administration of drugs in small primates

A restraint and catheter-protection system consisting of a Plexiglas helmet and a nylon-tubing protector line has been developed to permit the long-term study of drug self-administration in monkeys. Frequent observations of monkeys in the system over a period exceeding a year have shown that the technique satisfies the requirements for long-term study of drug administration through an indwelling catheter and avoids several recurring problems inherent in other protection systems. Additional applications of the helmet and protector line are discussed.     

An inherent problem in certain constant-current stimulators

A basic and potentially dangerous problem that may occur in the use of triggered constant-current generators for stimulation is discussed in the general case. A solution with schematic illustration is presented for one specific constant-current generator, the CCS-1A manufactured by Electronics of Life Sciences, Inc.     

Preprocessing on the basis of frequency of occurrence

The release from PI methodology was used to test Oldfield's (1966) suggestion that human memory is organized in part on the basis of frequency of occurrence. An observed release from PI identified frequency of occurrence as an encoding category and provided support for the underlying assumptions of Oldfield's model.     

Signalled and unsignalled free-operant avoidance in the pigeon

Pigeons were trained to depress a lever to avoid electric shock under free-operant avoidance schedules without a warning signal, or with a warning signal that could be terminated only by a response. Most birds in the signalled avoidance procedure terminated more than 50% of the warning signals before shock. In the unsignalled avoidance procedure, several birds formed a temporal discrimination and received relatively few shocks; other birds responded only in post-shock bursts, and received many more shocks.     

Rate-dependent effects of drugs: modification by discriminative stimuli of the effects of amobarbital on schedule-controlled behavior

Food-deprived pigeons responded under a 10-min fixed-interval schedule of food presentation. During even-numbered minutes of the schedule, the discriminative stimuli were the same as those present when food was delivered. During odd-numbered minutes there was either a change in keylight color or a change in overhead illumination, either for the entire duration of the odd-numbered minutes, or for 3-sec after each response. Responding during even-numbered minutes showed the usual pattern of positive acceleration; responding during odd-numbered minutes was similarly graded, but rates were much lower. The response-rate-increasing effects of amobarbital were inversely related to control rates of responding for both even- and odd-numbered minutes. However, when the stimulus change during odd-numbered minutes was either keylight color or a change from a darkened to a brightly illuminated chamber, increases in responding were considerably less than predicted on the basis of the effects on responding during even-numbered minutes. When the stimulus change was from a darkened to a dimly illuminated chamber, control rates of responding changed little, but increases in responding during odd-numbered minutes after amobarbital were considerably greater, and of the approximate order expected on the basis of control rate.     

Management skill in student organizations

Seventy-two social fraternities were studied to discover some reasons for the variation in the degree of success attained by these student organizations on a college campus. The specific factors studied were management practices that could be employed by the groups. Analysis revealed a significant positive relationship between success as a fraternity and the use of certain management practices, and it identified several individual practices or characteristics highly associated with more successful groups. This article proposes that student organizations would find such practices influential in their future survival and success.     

Ethics and Counseling Decisions

Although some behavioral scientists and practitioners contend that man has no genuine moral choices to make, common sense and philosophical reflection ineluctably affirm the moral nature of man. When young people are faced with moral decisions, they often seek the assistance of a counselor. Although such counselors are routinely expected to aid clients in making decisions about their education and their careers, there is considerably less agreement about their responsibility for helping students to make moral choices. The central thesis of this article is that a knowledge of ethical theories, the practical principles which flow from them, and the method of decision-making which they indicate will enable the counselor to assist his clients with their moral problems.     

Need for approval and counseling outcomes

The intent of this study was to determine the effects of a clients' need for approval on the outcomes of counseling. The expectation was that clients who have a high need for approval by others would cooperate more with the counseling process and would more often be successful in the sense of being rehabilitated. The Marlowe-Crowne Social Desirability Scale was administered to 167 applicants at a state rehabilitation agency immediately after the initial interview. It was hypothesized that successfully rehabilitated clients would obtain significantly higher social desirability scores than those clients who were not successful. The results confirmed the hypothesis at the .01 level of significance.     

Technology and guidance: a balance

The following symposium discusses the place of technology in guidance and some of the concerns involved. Tiedeman, a leading authority on technological applications in guidance, takes the position that guidance technology is an important new development. Schmidt, who has written widely in the areas of psychology and counseling, questions the place of technology in guidance and society and underlines some of the concerns related to the adoption of technology. The authors' discussions of “one-way” versus “two-way” thinking and the problem of control over the technology should be of interest to readers concerned with applying technology in guidance.