The Impact of Language Translation on the Internal Structure of a Rating Scale: The Strengths and Difficulties Questionnaire in Spanish

The purpose of this study was to compare the psychometric properties of the Spanish version of the Strengths and Difficulties Questionnaire SDQ a 25-item behavioral screener with the English version Participants included in this study were 363 English-speaking parents and 334 Spanish-speaking parents of preschool age children ages 3-5 who took part in the Children s Hospital of Orange County University of California Irvine Initiative for the Development of Attention and Readiness CUIDAR program from 2004-2008 This study used data from the CUIDAR program to explore mean rating differences between the English and Spanish versions of the SDQ along with coefficient alpha as an indicator of reliability at the scale and composite level and factor analytic evidence of score validity Mean ratings of the scales and the Total Difficulties scale were very similar across language forms Reliability coefficients indicated alphas were higher for scores derived from the English forms compared to the Spanish forms at the scale and composite levels although neither form produced scores with adequate reliability at the scale level Finally the Five First Order Factor Model was the best-fitting and most valid representation of all 25 items of the SDQ regardless of the language of the for

Sleep in Elite Athletes and Nutritional Interventions to Enhance Sleep

Sleep has numerous important physiological and cognitive functions that may be particularly important to elite athletes. Recent evidence, as well as anecdotal information, suggests that athletes may experience a reduced quality and/or quantity of sleep. Sleep deprivation can have significant effects on athletic performance, especially submaximal, prolonged exercise. Compromised sleep may also influence learning, memory, cognition, pain perception, immunity and inflammation. Furthermore, changes in glucose metabolism and neuroendocrine function as a result of chronic, partial sleep deprivation may result in alterations in carbohydrate metabolism, appetite, food intake and protein synthesis. These factors can ultimately have a negative influence on an athlete’s nutritional, metabolic and endocrine status and hence potentially reduce athletic performance. Research has identified a number of neurotransmitters associated with the sleep–wake cycle. These include serotonin, gamma-aminobutyric acid, orexin, melanin-concentrating hormone, cholinergic, galanin, noradrenaline, and histamine. Therefore, nutritional interventions that may act on these neurotransmitters in the brain may also influence sleep. Carbohydrate, tryptophan, valerian, melatonin and other nutritional interventions have been investigated as possible sleep inducers and represent promising potential interventions. In this review, the factors influencing sleep quality and quantity in athletic populations are examined and the potential impact of nutritional interventions is considered. While there is some research investigating the effects of nutritional interventions on sleep, future research may highlight the importance of nutritional and dietary interventions to enhance sleep