Premotor and Motor Reaction Time As a Function of Response Complexity

Abstract

Two experiments were conducted to identify the response elements responsible for the complexity effect found by Henry and Rogers (1960). An attempt was made to determine if these elements were affecting the premotor time component of simple reaction time (SRT). If they were, a strong case could be made for the argument that neuromotor programming time was affected because premotor time is a more exact estimate of it than SRT. The results revealed that premotor time was unaffected by a forward change in movement direction, but increased as the number of movement parts increased from one to two and as the demand for movement accuracy increased. Thus, increasing the (1) number of parts and (2) accuracy demands were identified as elements of response complexity which increase programming time and support Henry and Rogers (1960) hypothesis that the time to initiate a response becomes longer as the programming process become more complex.     

Exploring the relationship between school discipline referrals and delinquency

There is a growing concern about violent and destructive behaviors of youth that require intervention by juvenile justice and youth‐serving agencies. This concern has led many to conclude that schools and community agencies must increase efforts to prevent juvenile delinquency and to provide programs that will facilitate rehabilitation, education, and vocational training for youth already involved. A clear understanding of the nature and range of behaviors that result in juvenile crime is needed in order to develop programs and interventions that can be expected to lead to beneficial changes for youth and for society as a whole. The purpose of this article is to describe the relationship between school behaviors and youth characteristics in school (e.g., discipline referrals, teacher nominations, nomothetic ratings) and referrals to juvenile authorities (e.g., illegal behaviors). We describe a strategy of using teacher nominations, school discipline referrals, and community arrest data to predict delinquent and violent behavior in youth. We outline data from a group of socially maladjusted middle school youth to illustrate the relationship between the two data sources and recommendations for identification and treatment of youth at risk for delinquency and antisocial behavior. © 2001 John Wiley & Sons, Inc.     

Assessing Precollege Science Education Outreach Initiatives: A Funder's Perspective

We describe an assessment of the collective impact of 35 grants that the Howard Hughes Medical Institute (HHMI) made to biomedical research institutions in 1999 to support precollege science education outreach programs. Data collected from funded institutions were compared with data from a control group of institutions that had advanced to the last stage of review but had not been funded. The survey instrument and the results reveal outcomes and impacts that HHMI considers relevant for these programs. The following attributes are considered: ability to secure additional, non-HHMI funding; institution buy-in as measured by gains in dedicated space and staff; enhancement of the program director''s career; number and adoption of educational products developed; number of related publications and awards; percentage of programs for which teachers received course credit; increase in science content knowledge; and increase in student motivation to study science.     

Testing times: the impact of prior knowledge on written genres produced in examination settings

This article explores the relationship between children's prior knowledge of spoken and written discourses and how this influences their attempts at examination writing. Particular emphasis is given to task demand in examination questions and how frequently this fails to acknowledge how prior knowledge might be realized in response to the question. School writing has specific genres of its own, genres which, although they may partially mirror genres found outside school, are nonetheless very specific. A significant factor in school genres is they emphasize an asymmetric power relationship between the teacher and the writer, with the teacher not only knowing the conventions of the genre, but often also acting as the determiner of the title, and as the arbiter of the finished piece of writing. Moreover, children whose home background has socioculturally prepared them for production of written genres are advantaged over those with different cultural and meaning‐making resources available to them.     

An international discussion about cross-cultural career assessment

Career assessments are a common resource used by career practitioners internationally to help inform individuals’ career decision-making. Research on the topic of cross-cultural career assessment has been mostly limited to the applicability of an established inventory to a different culture. The purpose of this paper is to summarize the existing research on cross-cultural assessment, and to indicate a need for collaboration among career development associations with respect to the value and use of career assessments, using current ethical standards as a springboard for determining common ground and perhaps a joint statement about the value of career assessments.     

Use and perceptions of information among family physicians: sources considered accessible,relevant, and reliable

Objectives:

The research determined (1) the information sources that family physicians (FPs) most commonly use to update their general medical knowledge and to make specific clinical decisions, and (2) the information sources FPs found to be most physically accessible, intellectually accessible (easy to understand), reliable (trustworthy), and relevant to their needs.

Methods:

A cross-sectional postal survey of 792 FPs and locum tenens, in full-time or part-time medical practice, currently practicing or on leave of absence in the Canadian province of Saskatchewan was conducted during the period of January to April 2008.

Results:

Of 666 eligible physicians, 331 completed and returned surveys, resulting in a response rate of 49.7% (331/666). Medical textbooks and colleagues in the main patient care setting were the top 2 sources for the purpose of making specific clinical decisions. Medical textbooks were most frequently considered by FPs to be reliable (trustworthy), and colleagues in the main patient care setting were most physically accessible (easy to access).

Conclusions:

When making specific clinical decisions, FPs were most likely to use information from sources that they considered to be reliable and generally physically accessible, suggesting that FPs can best be supported by facilitating easy and convenient access to high-quality information.

Highlights

• Medical textbooks were the most popular information source for family physicians'' (FPs'') clinical decision-making purposes, and medical journals were the most popular information source for the purpose of updating FPs'' general medical knowledge.
• FPs considered medical textbooks to be the most reliable (trustworthy) source, colleagues the most physically accessible, and continuing medical education the most relevant and intellectually accessible.
• The lowest ranked information sources across all four attributes were personal digital assistants, mental health professionals, pharmaceutical sales representatives, and other decision aids.

Implications

• The most popular information sources for clinical decision-making purposes among FPs were sources characterized as reliable and generally physically accessible.
• This study suggests the need for further research into interventions that target information access barriers in FPs'' practice settings and the promotion of reliable evidence for FPs'' clinical decision-making purposes.

     

Intentional Informationists: Re-envisioning Information Literacy and Re-designing Instructional Programs Around Faculty Librarians' Strengths as Campus Connectors,Information Professionals,and Course Designers

This article adds to the recent literature that questions, and hopes to redefine, the information literacy notions and practices in academic libraries and their institutions. The authors draw on research in the area of social justice to express the need for academic libraries to explore new avenues to insure their institution's graduates are not merely competent consumers of information. The authors put forward the notion of the intentional informationist, who they define as having the contextual, reflective and informational skills to identify information opportunities, tackle complex information problems and pitfalls, and provide solutions or considerations that do not just meet her individual needs. In addition, they pose questions and detail opportunities, partnerships, and examples of curricular and co-curricular integration to engage students beyond the library, instruction sessions, a single course, or graduation requirement.