Catherine M Wright, Paula J Duquesnay, Stephanie Anzman-Frasca, Virginia R Chomitz, Kenneth Chui, Christina D Economos, Elizabeth G Langevin, Miriam E Nelson, Jennifer M Sacheck
Study protocol: the Fueling Learning through Exercise (FLEX) study - a randomized controlled trial of the impact of school-based physical activity programs on children's physical activity, cognitive function, and academic achievement
BMC public health
seven experts personality measurement discuss viability publicdomain personality measures focusing international personality item pool ipip prototype since inception 1996 use items scales ipip increased dramatically items ipip translated english 25 languages currently 80 publications using ipip scales listed ipip web site httpipiporiorg rate ipiprelated publications increasing rapidly growing popularity ipip attributed five factors 1 cost free 2 items obtained instantaneously via internet 3 includes 2000 items easily available inspection 4 scoring keys ipip scales provided 5 items presented order interspersed items reworded translated languages administered world wide web without asking permission anyone unrestricted availability ipip raises concerns possible misuse unqualified persons freedom researchers use ipip idiosyncratic ways raises possibility fragmentation rather scientific unification personality research