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Direct linkPane, John F.; Griffin, Beth Ann; McCaffrey, Daniel F.; Karam, Rita – RAND Corporation, 2014
This addendum to previously published results presents alternative analyses of data from large-scale effectiveness studies of Cognitive Tutor Algebra I in middle schools and high schools. These alternative analyses produce results that are substantively the same as previously reported. We find a significant positive effect of 0.21 standard…
Descriptors: Algebra, Statistical Significance, Pretests Posttests, Reader Response
Peer reviewedDittmar, Helga; Halliwell, Emma; Ive, Suzanne – Developmental Psychology, 2006
Reports an error in "Does Barbie make girls want to be thin? The effect of experimental exposure to images of dolls on the body image of 5- to 8-year-old girls" by Helga Dittmar, Emma Halliwell and Suzanne Ive ("Developmental Psychology," 2006 Mar, Vol 42[2], 283-292). A substantive error occurs in the Body shape dissatisfaction section on page…
Descriptors: Rating Scales, Developmental Psychology, Self Concept, Females
