Abstract
Previous investigations into raising IQ show that after an intervention ends, the effects fade away. This paper is an attempt to understand one possible reason for this fadeout; the idea that the effects fade because they were not to the underlying construct g. A large (N=985) randomized controlled trial is re-analyzed to investigate whether the intervention, which began at birth and lasted for the first three years of the children's life, raised the underlying cognitive factor of IQ tests. This was done under strict measurement invariance. The intervention indeed raised the g factor at age three. No effects were seen at follow-up assessments at ages five and eight after the intervention ended. Therefore, the raising IQ/raising g distinction is insufficient as an explanation for the fadeout effect, as changes to the environment can improve g and still fade.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
