The role of signaled periods of nonreinforcement in responding on a random schedule in autoshaping

Little responding develops to a conditioned stimulus (CS) that is placed in a random relation to an unconditioned stimulus (US). However, if the USs not preceded by that CS are themselves signaled by another stimulus, then the CS does come to elicit responding. This result has been attributed (e.g., by Durlach, 1983) to the signal’s blocking of conditioning to background cues that otherwise would prevent conditioning of the CS. However, Goddard and Jenkins (1987) have suggested the alternative that signaling the USs promotes responding due to the adventitious creation of periods of signaled nonreinforcement. Two experiments were conducted to assess this alternative, involving an autoshaping preparation in pigeons. In Experiment 1, little responding to a keylight CS presented in a random relation to a food US occurred, despite the explicit presentation of a discrete noise signaling periods of no food in the intertrial interval (ITI). Experiment 2 was designed to replicate the procedure of Goddard and Jenkins, in which an auditory stimulus extended throughout the ITI of a random schedule, terminating only prior to extra USs and during the CS. Contrary to their findings, little responding developed to the target CS. However, responding did develop when the sound-free period occurred only prior to the extra USs. These results offer little support for the hypothesis that signaled periods of nonreinforcement promote responding on random schedules. However, they are consistent with the view that signaling of ITI USs acts by preventing conditioning of potentially competitive background cues.     

How Should Instructional Designers Be Educated?

Simon suggested that design, defined broadly, is concerned with any kind of deliberate problem solving, whether it be in fields traditionally associated with design, like architecture and engineering, or fields involving the design of instruction. Since instructional design is a kind ol'skillcd professional behavior, the education of other skilled professionals is examined and suggestions are made for analogous instructional techniques in any field. The question of how instructional designers should be educated is related to the larger question of how to teach people to design in general.     

Using the College Outcome Measures Project to measure college outcomes

This article describes one institution's use of the College Outcome Measures Project (COMP) in comparing outcomes for graduates of traditional and non-traditional programs. The study was designed to answer three questions concerning the use of COMP in evaluating traditional and non-traditional programs. Results obtained in a study of 96 University of Minnesota graduating seniors suggest greater potential usefulness in distinguishing among institutions than in comparing outcomes of programs within an institution. The authors conclude that as new approaches and instruments for measuring college outcomes become available, criteria for instrument selection need to be shared among individuals charged with conducting outcome studies.     

What do freshmen really know about research? Assess before you teach

The paper describes an effort to assess the information literacy skills of first year college students. An instrument was developed and information was gathered on students' experience and comfort in conducting library research as well as their perceived competence with specific information literacy skills. In addition, students completed a skills test to assess specific knowledge and skills relating to information literacy. Entering freshmen generally self-reported their skills to be less than “excellent.” This finding was supported by the results of the skills test. Strengths and weaknesses in information literacy skills are reported as well as implications for librarians who assess and teach these skills to students.     

Volunteering in libraries,museums and archives

Volunteering is very much in vogue as far as government is concerned; volunteering strengthens society through participation, whilst helping to extend and deliver services and enhance the lives of volunteers in numerous ways. This chapter of Cultural Trends offers an overview of volunteering before looking at the involvement of volunteers in museums, libraries and archives. Many volunteer‐involving organisations are examining carefully the way in which they recruit and support volunteers, as the environment in which volunteers are recruited becomes more competitive. At the same time, organisations can sometimes lose sight of why they involve volunteers.

This chapter reports on a survey of museums and libraries conducted for Resource: the Council for Museums, Archives and Libraries, identifying the added value of involving volunteers and the institutional structures in place to support them. A survey was conducted in which 1,500 questionnaires were sent out ‐ with 500 each going to libraries, museums and archives. It finds that volunteers are a key element in extending the services that museums and libraries can offer. It also finds that practices in involving volunteers vary widely. Volunteers are more likely to be found in libraries than museums or archives and women are more likely to be involved than men. Very few of the organisations returning the questionnaires have somebody whose job is to manage or coordinate volunteers; perhaps unsurprisingly most are to be found in museums. Where organisations do not involve volunteers, issues of time management were most often cited, although a minority argued against involving volunteers per se.

The chapter concludes that although many organisations value highly the involvement of volunteers, there is more that can be done to support volunteering in libraries, museums and archives.