It's a comment from a new poster, whose name I do not recognize from prior reading of this blog and its comment sections. (skepticalob.com)
As further evidence of this, we estimated value - added to math scores in middle schools controlling only for prior reading scores — prior math scores were ignored. (carnegieknowledgenetwork.org)
The network provides the first comprehensive measurements of the deeper ocean; most prior readings stopped at 700 meters. (e360.yale.edu)