Ratings of perceived exertion of ACSM exercise guidelines in individuals varying in aerobic fitness

The physiological responses of high (HF) and low fit (LF) individuals at given perceived exercise intensities were compared to ranges provided by the American College of Sports Medicine (ACSM). Participants were 7 LFand 8 HF men between the ages of 22 and 26 years. All participants performed a maximum oxygen uptake and lactate threshold test and two 15-min experimental runs in which they exercised at a constant perceived exercise intensity (RPE 13 and 17). The LF group exhibited significantly greater maximum oxygen uptake reserve ( % VO2R, p < .05) and velocity of lactate threshold (p < .01) values than HF at RPE 13 and 17. Both groups had significantly greater % VO2R and maximum heart rate values at RPE 13 in comparison with the ACSM ranges, using the highest value for the given range (p < or = .001).     

The Development of Social Cognition: Preschoolers' Use of Mental State Talk in Peer Conflicts

Research Findings: This research examines preschoolers' use of mental state terms in naturally occurring peer conflicts in the classroom to determine how children use mental state terms for organizing their social interactions. Analyses focus on the types, frequencies, and social interactive functions of mental state terms. Utterances (N = 166) with mental state terms from 124 conflict episodes were analyzed. Children used a number of different mental state terms, want and need being the most frequently used, to index their own and their interlocutors' desires for subtle interactive purposes. Want was paired most often with bids for action, objects, inclusion in a play area, or clarification of another child's mental state. Need was most often used when directing the other child's action or attention, to justify, clarify, or insist on their own action or previous request. Practice or Policy: Findings suggest that children's peer conflicts constitute a rich setting for the active construction of social relationships through the use of utterances with mental state language. This emphasis on peer interactions has the potential to inform new ways of supporting children's self–other development as a foundation for academic success.     

The Relationship Between Demographic Variables and Scientific Creativity: Mediating and Moderating Roles of Scientific Process Skills

Research in Science Education - The purpose of this study is to explore the strength of relationships between 7th, 8th, and 9th grade students’ scientific process skills and scientific...     

Reaching a Moving Target: How Local TV Stations are Using Digital Tools to Connect With Generation C

Local television in the United States is experiencing dramatic changes due to shifts in viewership and digital technologies. This study examined the extent to which a sample of local television stations in the United States are meeting the demands and needs of Generation C/Millennials through the use of social media, mobile technology, and other online communication tools. The major finding of this study was that television stations have a growing repertoire of social media and other connectivity tools with which to engage their viewers, but that stations in larger markets are making fuller use of interactive technologies.     

Hybrid Computerized Adaptive Testing: From Group Sequential Design to Fully Sequential Design

Computerized adaptive testing (CAT) and multistage testing (MST) have become two of the most popular modes in large‐scale computer‐based sequential testing.  Though most designs of CAT and MST exhibit strength and weakness in recent large‐scale implementations, there is no simple answer to the question of which design is better because different modes may fit different practical situations. This article proposes a hybrid adaptive framework to combine both CAT and MST, inspired by an analysis of the history of CAT and MST. The proposed procedure is a design which transitions from a group sequential design to a fully sequential design. This allows for the robustness of MST in early stages, but also shares the advantages of CAT in later stages with fine tuning of the ability estimator once its neighborhood has been identified. Simulation results showed that hybrid designs following our proposed principles provided comparable or even better estimation accuracy and efficiency than standard CAT and MST designs, especially for examinees at the two ends of the ability range.     

Age-related differences in acceleration, maximum running speed, and repeated-sprint performance in young soccer players

We investigated age-related differences in the relationships among acceleration, maximum running speed, and repeated-sprint performance in 61 highly trained young male soccer players (Under 14, n = 14; Under 16, n = 22; Under 18, n = 25). We also examined the possible influence of anthropometry (stature, body mass, fat-free mass) and biological maturation (age at peak height velocity) on performance in those three sprint-running qualities. Players were tested for 10-m sprint (acceleration), flying 20-m sprint (maximum running speed), and 10 × 30-m sprint (repeated-sprint performance) times. Correlations between acceleration, maximum running speed, and repeated-sprint performance were positive and large to almost perfect (r = 0.55-0.96), irrespective of age group. There were age-based differences both in absolute performance in the three sprint-running qualities (Under 18 > Under 16 > Under 14; P < 0.001) and when body mass and fat-free mass were statistically controlled (P < 0.05). In contrast, all between-group differences disappeared after adjustment for age at peak height velocity (P > 0.05). The large correlations among acceleration, maximum running speed, and repeated-sprint performance in all age groups, as well as the disappearance of between-group differences when adjusted for estimated biological maturity, suggest that these physical qualities in young highly trained soccer players might be considered as a general quality, which is likely to be related to qualitative adaptations that accompany maturation.