A comparison of the Rescorla-Wagner and Pearce models in a negative patterning and a summation problem

In two experiments, we examined two related conditioning problems previously investigated by Red-head and Pearce (1995a) and Pearce, Aydin, and Redhead (1997). Experiment 1 involved an A+, B+, C+, AB+, AC+, BC+, ABC2 discrimination. The Rescorla-Wagner model predicts that response to AB, AC, and BC will be greater than that to A, B, and C at asymptote, whereas the Pearce model makes the opposite prediction. In Experiment 2, we investigated the responding to a novel ABC compound in groups trained with either A+, B+, C+ or AB+, AC+, BC+. The Rescorla-Wagner model predicts greater response to ABC in the group trained with A+, B+, C+ than in the group trained with AB+, AC+, BC+, whereas the Pearce model makes the opposite prediction. In contrast to the findings of Redhead and Pearce (1995a) and Pearce et al. (1997) in pigeon autoshaping, our findings in rabbit eyelid conditioning support the Rescorla-Wagner model.     

Higher prevalence of childhood sexual abuse among Latino men who have sex with men than non-Latino men who have sex with men: data from the Urban Men's Health Study

OBJECTIVE: The prevalence of childhood sexual abuse among Latino adult men who have sex with men who live in the US was estimated because a history of childhood sexual abuse increases HIV sexual risk behaviors and other negative health outcomes in adulthood. METHOD: The Urban Men's Health Study is a random-digit telephone probability survey of 2881 adult men who have sex with men (MSM) aged 18 years or older residing in San Francisco, New York, Los Angeles, and Chicago. Self-reported history of childhood sexual abuse was the main outcome measure gathered from 2692 MSM. RESULTS: A significantly higher proportion of Latino MSM reported sexual abuse before age 13 (22%) than did non-Latino MSM (11%). CONCLUSIONS: Latino MSM are twice as likely to report a history of childhood sexual abuse than are non-Latino MSM. Given the association between childhood sexual abuse and increased risk for HIV and other negative health outcomes, health providers must remain vigilant to the possibility of childhood sexual abuse histories among their Latino patients.     

The preparation experiences of elementary mathematics specialists: examining influences on beliefs,content knowledge,and teaching practices

Many in the field of mathematics education call for elementary schools to have elementary mathematics specialists (EMSs) who provide needed mathematical expertise and support for children and teachers. EMSs serve as a reasonable, immediate alternative to the challenges generated by elementary teachers needing improved mathematical knowledge for teaching in the classroom. However, limited inquiry has explored how to best prepare EMSs and how program features and learning activities influence their development. This mixed-method study identifies some of the interrelated benefits from a K-5 Mathematics Endorsement Program designed to prepare EMSs through examining changes in mathematical beliefs, specialized content knowledge (SCK), and classroom teaching practices during the program. Data (n = 32) were collected over the 2-semester program via belief surveys, a content knowledge assessment, observations of teaching practices, and individual interviews from elementary teachers participating in the program. The findings show some changes in beliefs can be made relatively quickly, other shifts in beliefs take more time and continued support, and changes in SCK and adoption of various aspects of standard-based pedagogy require considerably greater opportunities to learn. The described program features and learning experiences provided a context for these changes and offer considerations for EMS preparation programs.     

Doing dissections differently: A structured,peer‐assisted learning approach to maximizing learning in dissections

Areas of difficulty faced by our veterinary medicine students, with respect to their learning in dissection classes, were identified. These challenges were both general adult‐learning related and specific to the discipline of anatomy. Our aim was to design, implement, and evaluate a modified reciprocal peer‐assisted/team‐based learning format—Doing Dissections Differently (DDD)—to complement existing dissection classes, with the intention of enhancing both student learning and the student learning experience. Second year veterinary medicine students (n = 193), in their usual dissection groups, were randomly assigned to one of four roles: anatomist, clinician, radiologist, and learning resources manager. Students attended a preparatory workshop outlining the skills required for effective execution of their role. They were then asked to perform their roles throughout five consecutive musculoskeletal dissection classes. Student attitudes to dissection classes before and after DDD were evaluated by questionnaire (146 respondents). There was a significant (P = 0.0001) improvement after DDD in a number of areas: increased perceived value of dissection classes as an anatomy learning aid; improved appreciation of the clinical relevance of anatomy; increased use of resources before and during dissection classes; and longer preparation time for dissection classes. Before DDD, 45% of students felt that at least one peer did not contribute usefully to the group during dissection classes; no improvement was seen in this measure after DDD. Although the new format highlighted a potential need to improve teamwork, most students actively engaged with DDD, with dissection classes valued more highly and utilized more effectively. © 2012 American Association of Anatomists.     

Reference Works

COMPUTER SCIENCE RESOURCES: A GUIDE TO PROFESSIONAL LITERATURE, compiled and edited by Darlene Myers (White Plains, New York: Knowledge Industry Publications, 1981—$59.50, paper).

LIBRARY AND REFERENCE FACILITIES IN THE AREA OF THE DISTRICT OF COLUMBIA, edited by Margaret S. Jennings (White Plains, New York: Knowledge Industry Publications, 1983—$39.00, paper).

STATISTICAL SERVICES DIRECTORY: A GUIDE TO THE ORGANIZATIONS, CORPORATIONS, PROFESSIONAL AND TRADE ASSOCIATIONS, RESEARCH CENTERS, UNIVERSITIES, PUBLISHERS, FOUNDATIONS, AND GOVERNMENT AGENCIES THAT PROVIDE STATISTICAL SERVICES (Detroit, Michigan: Gale Research Company, 1984—$150).

CAREERS IN INFORMATION, edited by Jane F. Spivack (White Plains, New York: Knowledge Industries Publications, 1982—$34.50/27.50).

VIDEOTEX: A SELECTED BIBLIOGRAPHY, Volume 1, 1979-1982 (Technical and Education Center of the Graphic Arts, Rochester Institute of Technology, P.O. Box 9887, Rochester, New York—price not given, but about $15.00, paper).

TELEMANAGEMENT NEWS SERVICE: THE NEWS SERVICE ON THE TELEPHONE INDUSTRY FOR OFFICE, DP AND COMMUNICATIONS MANAGEMENT (SRG Publications, P.O. Box 335, Palmyra, New Jersey 08065—$260.00 per year/weekly).

SPACE ENTERPRISE TODAY: THE NEWSLETTER ON COMMERCIAL SPACE VENTURES (Phillips Publishing Inc., 7315 Wisconsin Avenue, Suite 1200 N, Bethesda, Maryland 20814—$297.00 per year/monthly).

LINK-UP: COMMUNICATIONS AND THE SMALL COMPUTER (On-Line Communications, Inc., 3938 Meadowbrook Road, Minneapolis, Minnesota 55426-$23.95 per year/monthly).

RESEARCH NOTES (Policy Development and Planning, Corporation for Public Broadcasting, 1111 Sixteenth Street, N. W., Washington, D.C. 20036—apparently free on request/irregular).

SCA: RADIO SUBCARRIER REPORT (Waters & Company, Security Mutual Building, Suite 322, Binghampton, New York 13901—$185.00 per year/monthly).     

The relationship between student communication motives and perceived instructor communicator style

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.     

Relational messages in conflict situations among siblings

The purpose of this study was to explore the association of sibling conflict style (i.e., integrative, distributive, avoidant) with perceived relational communication themes (i.e., immediacy, similarity, receptivity, composure, formality, dominance, equality, task orientation). Participants were 186 undergraduate students who reported on a recent conflict episode with a sibling. Results indicate that (a) siblings who used the relational communication themes of immediacy, similarity, receptivity, composure, and equality reported using the integrative conflict strategy, but not the distributive conflict strategy, and (b) siblings who used the relational communication theme of immediacy and to a lesser extent the theme of task orientation, but not the relational communication themes of similarity and equality, reported not using the avoidant conflict strategy.     

Sibling communication satisfaction as a function of interpersonal solidarity,individualized trust,and self‐disclosure

The purpose of this study was to examine sibling communication satisfaction, with a specific focus on interpersonal solidarity, individualized trust, and self‐disclosure. Respondents (N = 360) were asked to report on a relationship with either an older sister, younger sister, older brother, or younger brother. Results indicate that interpersonal solidarity is the largest predictor of sibling communication satisfaction, followed by individualized trust, and self‐disclosure.     

The relationship between perceived instructor communicator style,argumentativeness, and verbal aggressiveness

The purpose of this study was to examine the interrelationships among perceived instructor communicator style, perceived instructor trait argumentativeness, and perceived instructor trait verbal aggressiveness in the college classroom. Participants were 236 undergraduate students enrolled in a variety of communication courses at a large Eastern university. Results indicated that (a) perceived instructor trait argumentativeness was positively related to the perceived instructor communicator style attributes of impression leaving, contentious, open, dramatic, dominant, precise, relaxed, attentive, and animated; (b) perceived instructor trait verbal aggressiveness was positively related to the perceived instructor communicator style attributes of contentious and precise, and negatively related to the perceived communicator style attributes of impression leaving, relaxed, friendly, attentive, and animated; and (c) perceived instructor use of verbally aggressive messages was related in some way to the perceived instructor communicator style attributes of contentious, impression leaving, friendly, attentive, animated, relaxed, dramatic, and precise.