Extinction produces context inhibition and multiple-context extinction reduces response recovery in human predictive learning

Two experiments with human participants were used to investigate recovery of an extinguished learned response after a context change using ABC designs. In an ABC design, the context changes over the three successive stages of acquisition (context A), extinction (context B), and test (context C). In both experiments, we found reduced recovery in groups that had extinction in multiple contexts, and that the extinction contexts acquired inhibitory strength. These results confirm those of previous investigations, that multiple-context extinction can produce less response recovery than single-context extinction, and they also provide new evidence for the involvement of contextual inhibitory processes in extinction in humans. The foregoing results are broadly in line with a protection-from-extinction account of response recovery. Yet, despite the fact that we detected contextual inhibition, predictions based on protection-from-extinction were not fully reliable for the single- and multiple-context group differences that we observed in (1) rates of extinction and (2) the strength of context inhibition. Thus, although evidence was obtained for a protection-from-extinction account of response recovery, this account can not explain all of the data.     

IT artifact bias: How exogenous predilections influence organizational information system paradigms

Efforts in IS research have long sought to bridge the gap between the information technology (IT) function and strategic business interests. People perceive affordances (possibilities for action) in information technology artifacts differently as cognitive structures (schema) which bias individual focus. This study explores how an individual's tendency to perceive the ‘trees’ in an IT ‘forest’ (artifact preference) affects their assessment of efforts to achieve more effective IT outcomes. The effect is demonstrated using a relatively simple IT success model. Further, in a sample of 120 survey responses supported by ten semi-structured interviews, we demonstrate that job role and organizational IT complexity systematically impact artifact perception. A better understanding of IT artifact bias promises to help organizations better assess information systems.     

Negative video as structure: Emotion,attention, capacity,and memory

This paper uses a limited capacity information processing theory of television viewing to investigate the effects of graphic negative video at four levels of processing (attention, capacity, encoding, and retrieval) and on two dimensions of emotional experience (arousal and valence). Results indicate that the presence of negative video in news stories increases attention, increases the amount of capacity required to process the message, increases the ability to retrieve the story, facilitates recognition of information presented during the negative video and inhibits recognition for information presented before the negative video. Results also indicate that the introduction of negative video increases the self‐reported negative emotional impact of the story — making it more arousing and more negative.     

Telecommunications

MISUNDERSTANDING MEDIA by Brian Winston (New York: Oxford University Press, 1986---$22.50)

SERVICES IN TRANSITION: THE IMPACT OF INFORMATION TECHNOLOGY ON THE SERVICE SECTOR edited by Gerald Faulhaber, et al. (Cambridge, MA: Ballinger, 1986---$29.95)

BUSINESS TELEMATICS: CORPORATE NETWORKS FOR THE INFORMATION AGE by Byron Belitsos and Jay Misra (Homewood, IL: Dow, Jones-Irwin, 1986---$25.00)

COMPUTER & TELECOMMUNICATIONS ACRONYMS edited by Julie Towell and Helen Sheppard (Detroit: Gale Research, 1986---$60.00)

Three recent publications from the Program on Information Resources Policy (200 Aiken, Harvard University, Cambridge, MA 02138---inquire of publisher for prices, paper)

COMPUTER III: A NEW ERA—A GUIDE TO THE FCC'S LANDMARK DEREGULATORY RULING edited by Dick Stirba (Telecom Publishing Group, Capitol Publications, 1101 King St., Alexandria, VA 22314---$140, paper)

MARKET AND STRATEGIC IMPACTS OF BYPASS by the Bethesda Research Institute (Phillips Publishing, 7811 Montrose Rd., Potomac, Md. 20854---price not given, paper)

SATELLITE COMMUNICATION SYSTEMS ENGINEERING by Wilbur Pritchard and Joseph Sciulli (Englwood Cliffs, NJ: Prentice-Hall, 1986---$42.95)

GUIDE TO SATELLITE TELEVISION INSTALLATION by John E. Traister (Englewood Cliffs, NJ: Prentice-Hall, 1986---$24.95)     

Developmental Trajectories of Acculturation: Links With Family Functioning and Mental Health in Recent‐Immigrant Hispanic Adolescents

The present study was designed to examine acculturative changes, and their effects on mental health and family functioning, in recent‐immigrant Hispanic adolescents. A sample of 302 Hispanic adolescents was assessed five times over a 2½‐year period. Participants completed measures of Hispanic and U.S. practices, collectivist and individualist values, and ethnic and U.S. identity at each time point. Baseline and Time 5 levels of mental health and family functioning were also assessed. Latent class growth analyses produced two‐class solutions for practices, values, and identifications. Adolescents who increased over time in practices and values reported the most adaptive mental health and family functioning. Adolescents who did not change in any acculturation domain reported the least favorable mental health and family functioning.