Differential reinforcement and resistance to change of divided-attention performance     

Podlesnik CA  Thrailkill E  Shahan TA 《Learning & behavior》2012,40(2):158-169

Behavioral momentum theory provides a framework for understanding how conditions of reinforcement influence instrumental response strength under conditions of disruption (i.e., resistance to change). The present experiment examined resistance to change of divided-attention performance when different overall probabilities of reinforcement were arranged across two components of a multiple schedule. Pigeons responded in a delayed-matching-to-sample procedure with compound samples (color + line orientation) and element comparisons (two colors or two line orientations). Reinforcement ratios of 1:9, 1:1, and 9:1 for accurate matches on the two types of comparison trials were examined across conditions using reinforcement probabilities (color/lines) of .9/.1, .5/.5, and .1/.9 in the rich component and .18/.02, .1/.1, and .02/.18 in the lean component. Relative accuracy with color and line comparisons was an orderly function of relative reinforcement, but this relation did not depend on the overall rate of reinforcement between components. The resistance to change of divided-attention performance was greater for both trial types in the rich component with presession feeding and extinction, but not with decreases in sample duration. These findings suggest promise for the applicability of quantitative models of operant behavior to divided-attention performance, but they highlight the need to further explore conditions impacting the resistance to change of attending.  相似文献   

Delayed matching to sample: Reinforcement has opposite effects on resistance to change in two related procedures     

John A. Nevin  Timothy A. Shahan  Amy L. Odum  Ryan Ward 《Learning & behavior》2012,40(4):380-392

The effects of reinforcement on delayed matching to sample (DMTS) have been studied in two within-subjects procedures. In one, reinforcer magnitudes or probabilities vary from trial to trial and are signaled within trials (designated signaled DMTS trials). In the other, reinforcer probabilities are consistent for a series of trials produced by responding on variable-interval (VI) schedules within multiple-schedule components (designated multiple VI DMTS). In both procedures, forgetting functions in rich trials or components are higher than and roughly parallel to those in lean trials or components. However, during disruption, accuracy has been found to decrease more in rich than in lean signaled DMTS trials and, conversely, to decrease more in lean than in rich multiple VI DMTS components. In the present study, we compared these procedures in two groups of pigeons. In baseline, forgetting functions in rich trials or components were higher than and roughly parallel to those in lean trials or components, and were similar between the procedures. During disruption by prefeeding or extinction, accuracy decreased more in rich signaled DMTS trials, whereas accuracy decreased more in lean multiple VI DMTS components. These results replicate earlier studies and are predicted by a model of DMTS from Nevin, Davison, Odum, and Shahan (2007).  相似文献   

Comparison of 3D reconstructive technologies used for morphometric research and the translation of knowledge using a decision matrix     

Charys M. Martin  Victoria A. Roach  Ngan Nguyen  Charles L. Rice  Timothy D. Wilson 《Anatomical sciences education》2013,6(6):393-403

The use of three‐dimensional (3D) models for education, pre‐operative assessment, presurgical planning, and measurement have become more prevalent. With the increase in prevalence of 3D models there has also been an increase in 3D reconstructive software programs that are used to create these models. These software programs differ in reconstruction concepts, operating system requirements, user features, cost, and no one program has emerged as the standard. The purpose of this study was to conduct a systematic comparison of three widely available 3D reconstructive software programs, Amira^®, OsiriX, and Mimics^®, with respect to the software's ability to be used in two broad themes: morphometric research and education to translate morphological knowledge. Cost, system requirements, and inherent features of each program were compared. A novel concept selection tool, a decision matrix, was used to objectify comparisons of usability of the interface, quality of the output, and efficiency of the tools. Findings indicate that Mimics was the best‐suited program for construction of 3D anatomical models and morphometric analysis, but for creating a learning tool the results were less clear. OsiriX was very user‐friendly; however, it had limited capabilities. Conversely, although Amira had endless potential and could create complex dynamic videos, it had a challenging interface. These results provide a resource for morphometric researchers and educators to assist the selection of appropriate reconstruction programs when starting a new 3D modeling project. Anat Sci Educ 6: 393–403. © 2013 American Association of Anatomists.  相似文献   

Collaborative Scholarship in Academic Library Literature: Who,What, and When     

Barbara Norelli  Timothy L. Harper 《College & Undergraduate Libraries》2013,20(2):173-196

Academic librarianship is very much concerned with the scholarship of others, but what do we know about the scholarship of librarians? This empirical study examines the relationship between author demographics, article topic, and, in particular, faculty and librarian authorship collaboration in the academic library literature. Extensive data collection facilitated the analysis of trends, correlations, and frequencies. Significant findings were found regarding the number of authors, article type, and paper topic in the context of faculty and librarian authorship collaboration.  相似文献   

Foreign and International     

Isaiah Litvak  Christopher Maule  Bernard Rubin  Jim Richstad  Michael McMillan  Ralph Barney 《Communication Booknotes Quarterly》2013,44(6):8-10

Isaiah Litvak and Christopher Maule's Cultural Sovereignty, The Time and Reader's Digest Case in Canada (New York: Praeger Special Studies, 1974---$13.50)

Survey of Public Attitudes Towards the Computer (Ottawa: Department of Communications, 1973---$1.00, paper)

Bernard Rubin's Propaganda and Public Opinion: Strategies of Persuasion (Middletown, Conn.: Xerox Educational Publications, 1973---copies on request, paper)

Jim Richstad, Michael McMillan, and Ralph Barney's The Pacific Islands Press: A Directory (Honolulu: University Press of Hawaii, 1973---no price given, paper)

Judith Tegger Kildow's Intelsat: Policy-Maker's Dilemma (Lexington, Mass.: Lexington Books/Heath, 1973---$12.50)  相似文献   

Book Reviews     

Hugh Chignell  Joel H. Wiener  Timothy Marjoribanks  Camilla Mount  Zou Yizheng 《Media History》2013,19(1):121-128

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The relationship between student communication motives and perceived instructor communicator style   总被引：1，自引：0，他引：1  

Scott A. Myers  Timothy P. Mottet  Matthew M. Martin 《Communication Research Reports》2013,30(2):161-170

The purpose of this study was to examine the relationship between student communication motives (i.e., relational, functional, participatory, excuse‐making, sycophantic) and perceived instructor communicator style (i.e., friendly, impression leaving, relaxed, contentious, attentive, precise, animated, dramatic, open, dominant). Participants were 228 undergraduate students enrolled in a variety of communication courses at a small Midwestern university. Results indicate that (a) the perceived instructor communicator style attributes of impression leaving, friendly, and contentious predict student use of the relational motive, (b) the attribute of friendly predicts student use of the functional motive, (c) the attributes of animated, contentious, and friendly predict student use of the participatory motive, (d) the attributes of attentive and contentious predict student use of the excuse‐making motive, and (e) the attributes of contentious and friendly predict student use of the sycophantic motive.  相似文献   

The relative impact of violation type and lie severity on judgments of message deceitfulness     

Timothy R. Levine  Kelli Jean K. Asada  Lisa L. Massi Lindsey 《Communication Research Reports》2013,30(3):208-218

This paper is part of a larger program of research assessing variables that underlie quantitative deceptiveness ratings. Several recent theoretical approaches, including Information Manipulation Theory (IMT), propose that deceptive messages are best understood as varying along two or more dimensions. At the same time, researchers have increasingly moved from dichotomous deception judgments to continuous deception ratings. This paper questions the validity of scaling degrees of deceptiveness along a single dimension, and argues that gradations in perceived deceptiveness reflect both the type of information manipulated and the severity of the consequences of the deception. This reasoning was tested with alxl experiment (N = 236) in which both the type of information manipulated and the severity of the consequences were systematically varied. As predicted, the results suggest that false messages (i.e., quality violations) are rated as more deceptive than lies of omission (i.e., quantity violations) when lie severity is low, but this difference diminishes as lie severity increases. In other words, false messages were rated as deceptive regardless of severity, but messages omitting information were rated as deceptive as false messages only when the consequences were serious. The implications for measuring deception are discussed.  相似文献   

Newer is not necessarily better a reexamination of affective learning measurement   总被引：1，自引：0，他引：1  

Timothy P. Mottet  Virginia P. Richmond 《Communication Research Reports》2013,30(4):370-378

The instrument commonly employed in instructional communication to measure affective learning was subjected to tests of its construct validity as a measure of higher‐order affective learning. The results indicate the instrument is a satisfactory instrument for this purpose. Newer measures of higher‐order affective learning were found to be highly associated with the older measure. Teacher evaluation measures were found to be distinct from both the newer and the older affective learning measures. The construct validity of the commonly used affective learning instrument is good.  相似文献   

A Defense of Publishing Nonsignificant (ns) Results     

Timothy R. Levine 《Communication Research Reports》2013,30(3):270-274

An argument is advanced for the propositions that a lack of statistically significant findings does not automatically justify rejecting a scientific article for publication or mean that the findings are necessarily uninformative. Systematically declining publication for nonsignificant results leads to negative consequences that include distorting scientific literatures, making hypotheses and theories less falsifiable, depriving meta-analyses of an accurate sample of prior findings, and encouraging questionable research practices. Providing effect sizes and confidence intervals can make findings more informative, regardless of whether the finding is p < .05.  相似文献