When people are sensitized to the purpose of your research during an initial assessment. As a result, later observations are based on what they picked up from the first assessment. The threat to internal validity here is

As part of the effort to address the problems of education and meet public demands for educational accountability, one of the incremental reforms in standards has been

a. adoption, in all but five states, of a competency test that must be passed for high school graduation. b. adoption of competency testing in most states before a student can graduate from high school. c. requiring all public school teachers to pass a written competency test in the subject matters that they teach. d. adoption of competency testing in all fifty states to monitor student progress and program effectiveness onbasic skills.

______ is a widely copied social media platform and has spawned copies around the world.

Fill in the blank(s) with the appropriate word(s).