Will Your Students Choose to Be Physically Active?

Personal fulfillment motivates adolescents to be physically active.

OBJECTIVES To identify factors that motivate adolescents to be physically active; to assess differences in motivators for groups at risk for physical inactivity, including girls vs boys, overweight vs nonoverweight youth, and youth with low vs high perceived sport competence; and to assess links between activity motivation and physical activity. DESIGN Cross-sectional study. SETTING A middl...

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Choose Your Speed

The pace of modern life is often quoted as a factor in mental ill-health although it is difficult to establish a scientific link. All the same, being able to 'pace' your life properly to suit the conditions is an important factor in personal stability.

Choose Your Friends Wisely

When we think of the word ‘‘contagious,’’ we often think of something negative, like the flu. But transmitted diseases aren’t the only thing that can quickly spread within a society—certain feelings, emotions, and behaviors can be easier to catch than the common cold. Does seeing others laugh or yawn make you want to do it too? You’re definitely not alone—‘‘behavioral contagion,’’ or the tenden...

Choose Your Words Carefully

Good feature selection is essential for text classification to make it tractable for machine learning, and to improve classification performance. This study benchmarks the performance of twelve feature selection metrics across 229 text classification problems drawn from Reuters, OHSUMED, TREC, etc. using Support Vector Machines. The results are analyzed for various objectives. For best accuracy...