Research Database

202 results for "Validation"

Nocturnal Activity and Sleep Assessment

  • Added on November 4, 2010

Sleep occupies approximately one third of our lives yet its modem study has largely been restricted to the use of the polygraph and to self-report via sleep logs. Actigraphy is a method for obtaining objective behavioral samples of nocturnal as well as diurnal activity. Activity is continuously measured and recorded ...

A Multimedia Activity Recall for Children and Adolescents

  • Published on 10/2002

Self-report measures remain the most popular tool for measuring the habitual physical activity of large samples of children The Multimedia Activity Recall for Children and Adolescents (MARCA) is a computer delivered questionnaire which requires children to recall the previous 24-h in 5 min segments The MARCA retains the key features of ...

Issues of Validity in Actigraphic Sleep Assessment

  • Published on 2004

Objectives The Standards of Practice Committee of the American Sleep Disorders Association has supported the use of actigraphy in the assessment of sleep disorders. Pollak et al disagree. The objective of this paper is to identify and critically evaluate several theoretic and methodological issues that are central to these divergent ...

International Physical Activity Questionnaire: 12-Country Reliability and Validity

  • Published on 09/2003

BACKGROUND Physical inactivity is a global concern, but diverse physical activity measures in use prevent international comparisons. The International Physical Activity Questionnaire (IPAQ) was developed as an instrument for cross-national monitoring of physical activity and inactivity. METHODS Between1997 and 1998, an International Consensus Group developed four long and four short forms ...

Estimating Physical Activity Using the CSA Accelerometer and a Physical Activity Log

  • Published on 09/2003

Purpose To compare two methods for measuring time spent in physical activity of differing absolute intensities. Methods Over a 7-d period, 59 women wore Computer Science and Applications, Inc. (CSA) accelerometers and recorded their activity in physical activity logs (PAL) at 15-min intervals. Three published cut points were used to classify ...

Development and Validation of a Pregnancy Physical Activity Questionnaire

  • Published on 10/2004

Purpose The effect of physical activity during pregnancy on maternal and fetal health remains controversial and studies have yet to identify the optimal dose of physical activity associated with favorable pregnancy outcomes. The aim of this study was to develop and validate a pregnancy physical activity questionnaire (PPAQ). Methods To ...