Relationship between performance-based and laboratory tests for lower-limb muscle strength and power assessment in healthy older women

The aim of the study was to assess the relationship between performance-based and laboratory tests for muscular strength and power assessment in older women. Thirty-two women aged 68.8 +/- 2.8 years were recruited. All participants were asessed for: (a) two performance-based tests--the box-stepping test (mean 296 +/- 51 J) and two-revolution maximum test (mean 7.1 +/- 2 kg) performed while pedalling on a cycle ergometer; and (b) muscular function tests--maximal instantaneous peak power jumping on a force platform (mean 1528 +/- 279 W); maximal voluntary contraction (MVC) during knee extension (mean 601 +/- 571 N) and leg press (mean 626 +/- 126 N), and leg press power (mean 483 +/- 98 W) on a dynamometer. Using univariate analysis, performance-based tests were compared with laboratory muscle strength and power measurements. Muscle power correlated most strongly with the performance-based tests for both jumping and leg press power (r-values between 0.67 and 0.75; P < 0.01). The correlation with muscle strength measures ranged between 0.48 and 0.61 (P < 0.01). The proposed tests may have particular relevance in geriatric and rehabilitation environments as they represent an easy, practical, and inexpensive alternative for the assessment of muscular strength and power.     

What is BioOne?

BioOne is a Web-based aggregation of full-text, high-impact bioscience research journals. Most of its titles are published by small societies or non-commercial publishers and have not been previously available in electronic format. This column describes the BioOne database and gives some basic information about the best ways to search its content.     

PEDro: a physiotherapy evidence database

PEDro is produced by the Centre for Evidence-Based Physiotherapy (CEBP), located in Sydney, Australia. PEDro is intended to be used to gain "rapid access to bibliographic details and abstracts of randomized controlled trials, systematic reviews and evidence-based clinical practice guidelines in physiotherapy." This column will provide some background information on the database, as well as cover the basics of searching its content.     

More than Manners: Conflict Resolution in Primary Level Classrooms

A diverse sample of kindergarten and 1st grade students participated in a social-emotional literacy and problem solving program. Students and their teachers participated in seven one-hour training sessions which included concrete activities designed to increase affective vocabulary and social problem-solving. Effective communication strategies such as I-messages and paraphrasing were also introduced and practiced. Pretest data and responses to the activities revealed that students could easily articulate inappropriate and disrespectful behaviors prior to training; however they were unable to articulate behaviors that would be helpful in resolving conflict. Although students had been extensively exposed to manners curricula which emphasized respectful behavior, the posttest results indicate that the social-emotional problem solving curricula offers a distinct set of skills which enable students to constructively manage conflict, manifested through statistically significant decreases in verbal and physical aggression. Teacher and staff posttest surveys corroborated the student findings.     

Amartya Sen’s Capability Approach and the Brokering of Learning Provision for Young Adults

This paper argues that Amartya Sen’s (Development as freedom, New York: Random House, 1999) concept of “capabilities” provides a useful framework for interpreting the brokering of learning provisions that emerged as a key feature of reforms to education and training in Queensland (Australia) for young people. Sen’s capability approach is presented as a way of understanding the place of vocational learning in capability deprivation and enhancement. Methodologically, this account comes from a case study of the reforms’ birthing and trial phases (2000–2006) (Harreveld and Singh 2007, Queensland’s education and training reforms for the future: the journey so far in senior phase learning. Brisbane, Qld: Department of Education, Training and the Arts). Evidence about the brokering of learning provision for young people comes from Queensland’s youth support coordinators, community mentoring scheme, flexible learning services and a work readiness program.

Perceptual narrowing of linguistic sign occurs in the 1st year of life

Over their 1st year of life, infants'"universal" perception of the sounds of language narrows to encompass only those contrasts made in their native language (J. F. Werker & R. C. Tees, 1984). This research tested 40 infants in an eyetracking paradigm and showed that this pattern also holds for infants exposed to seen language-American Sign Language (ASL). Four-month-old, English-only, hearing infants discriminated an ASL handshape distinction, while 14-month-old hearing infants did not. Fourteen-month-old ASL-learning infants, however, did discriminate the handshape distinction, suggesting that, as in heard language, exposure to seen language is required for maintenance of visual language discrimination. Perceptual narrowing appears to be a ubiquitous learning mechanism that contributes to language acquisition.