What is an incentive system?

Performance Technologists have come a long way—from producing zebra-striped books to implementing innovative interventions. It is about time we applied our technology to where the money is: compensation packages and incentive systems. This new series will feature articles on different aspects of developing, implementing, evaluating, and improving incentive systems.     

Higher anterior knee laxity influences the landing biomechanics displayed by pubescent girls

Despite an increase in anterior knee laxity (AKL) during the adolescent growth spurt in girls, it is unknown whether landing biomechanics are affected by this change. This study investigated whether pubescent girls with higher AKL displayed differences in their lower limb strength or landing biomechanics when performing a horizontal leap movement compared to girls with lower AKL. Forty-six pubescent girls (10–13 years) were tested at the time of their peak height velocity (PHV). Passive AKL was quantified and used to classify participants into higher (HAKL; peak displacement > 4 mm) and lower (LAKL; peak displacement < 3 mm) AKL groups (n = 15/group). Three-dimensional kinematics, ground reaction forces (GRF) and muscle activation patterns were assessed during a horizontal leap landing. HAKL participants displayed significantly (P < 0.05) reduced hip abduction, increased hip abduction moments, as well as earlier hamstring muscle and later tibialis anterior activation compared to LAKL participants. Girls with HAKL displayed compensatory landing biomechanics, which are suggested to assist the functional stability of their knees during this dynamic task. Further research is warranted, however, to confirm or refute this notion.     

The Impact of Gender on Types of Verbal Interactions in Corporate Training Sessions

This study describes verbal interactions in 13 selected training sessions across the United States using the INTERSECT instrument. More than two‐thirds of the interactions were found to be acceptance, the mere acknowledgment of a response by the instructor, with remediation accounting for about 21%, and praise, 11%. Criticism occurred only 4 times, or 18%. Male trainers provided more acceptance responses than female trainers at a statistically significant level. There were no differences in verbal classroom interactions based on gender equity during instruction.     

Investigations into the relationships of the WRAT,the PIAT,the SORT,and the WISC-R in low-functioning referrals

Research involving standardized reading achievement tests has been widespread, but there has been little investigation into the relationships among the more widely used tests of reading achievement. In the present study, the Reading subtest of the WRAT, the Reading Comprehension subtest of the PIAT, and the SORT were compared with each other and with the WISC-R. Results showed a high correlation between the WRAT and the PIAT, a moderately high correlation between the SORT and the PIAT, and a very low correlation between the SORT and the WRAT. The WRAT and the PIAT had higher correlations with the various components of the WISC-R than did the SORT. These findings imply that the WRAT and the PIAT measure essentially the same dimension of reading achievement, possibly verbal fluency, but that the SORT is measuring a different dimension, one that is also tapped to some extent by the PIAT.     

Life events as stressors with gifted adolescents

The present study investigated the perceived stressfulness of life events by 53 gifted adolescents in a rural southeastern area. In comparison to previous samples, these youths rated life events as similar except for items related to achievement, social status, and career aspirations, which they rated as more stressful. Pressure to perform was rated as stressful, but actually being labeled gifted was rated as a relatively low stressful event.     

Construct validity of the K-ABC for gifted children

Fifty-four elementary-age gifted students were administered the K-ABC. To determine construct validity of the test for this population, the factor structure was obtained for mental processing and achievement subtests and then compared to the factor structure obtained for children from the standardization sample via a procedure that determines factor structure similiarity between groups. Except for minor variations, the factor structure for the gifted children was very similar to that for nongifted children in the standardization sample. However, the most parsimonious structure accounted for slightly less than 40% of the shared test variance, which leads to questions about the advisability of educational program planning based on obtained scores.     

Effects of obesity on breast size,thoracic spine structure and function,upper torso musculoskeletal pain and physical activity in women

Purpose:This study investigated the effects of obesity on breast size,thoracic spine structure and function,upper torso musculoskeletal pain and physical activity participation in women living independently in the community.Methods:A total of 378 women were divided into 3 groups(Not Overweight:body mass index(BMI)=22.5±0.2 kg/m^2(mean±SE);Overweight:BMI=27.4±0.3 kg/m^2;Obese:BMI=35.4±0.3 kg/m^2).Outcome variables of breast volume(mL),thoracic flexion torque(N·m),thoracic kyphosis(degrees),upper torso musculoskeletal pain(score) and time spent in physical activity(min) were calculated and compared among the 3 groups,adjusting for between-group differences in age.Results:There was a significant main effect of BMI on all outcome variables.Participants classified as Obese displayed significantly larger breasts,had greater thoracic flexion torques and reported less time participating in physical activity relative to the participants who were classified as Not Overweight and Overweight.Participants in the Obese group also displayed significantly more thoracic kyphosis and reported significantly more upper torso musculoskeletal pain compared to their counterparts who were classified as Not Overweight.Conclusion:This study is the first to demonstrate that increased obesity levels were associated with compromised kyphosis and loading of the thoracic spine,as well as increased symptoms of upper torso musculoskeletal pain and reduced time spent in physical activity in women living in the community.We recommend further research to determine whether evidence-based interventions designed to reduce the flexion torque generated on the thoracic spine can improve these symptoms of upper torso musculoskeletal pain and the ability of women with obesity to participate in physical activity.     

A study of self-actualization and self-concept in intellectually gifted students

The self-actualization and self-concept of 368 intellectually gifted students in grades 4 through 12 from a rural school district in a southern state were investigated using the Reflections of Self by Youth (ROSY; Schatz & Buckmaster, 1981), the Maslowian Scale (Falk, Bard, Duffy, Grieco, & Markus, 1988), and the Piers-Harris Children's Self-Concept Scale (Piers & Harris, 1969). School level and gender had significant effects on the ROSY. The mean for students at the high school level was higher than at either the elementary or junior high school level. The mean for girls was higher than for boys. A significant interaction between school level and gender was observed only on the Psychological subscale of the Maslowian Scale. The ROSY and Self-actualization subscale and Total score of the Maslowian Scale were significantly related to the Piers-Harris. The ROSY and the Maslowian Scale were found to share a significant relationship (r = .51).