Mendoza et al. (2009) introduced a coin-rotation task as a convenient test of motor dexterity. it involves timed completion of twenty 180° rotations of a nickel using the thumb, index, and middle fingers. research participants' results on the coin-rotation task are compared with their results on a test of grip strength (a measure of another construct: global upper-extremity strength). the correlation between the coin-rotation task and the grip strength task were found to be not statistically significant. this comparison provides support for which type of measurement validity?

Before they can be published, scientific papers must be peer-reviewed. this means that: a) some other scientific experts read the papers and guarantee that they are true. b) some other scientific experts read the papers and provide quality control by eliminating many mistakes. c) an editor reads the papers, to make sure that all the semicolons are in the correct places. d) everyone in the world is given the opportunity to comment on the papers through a specially maintainedblog. e) government bureaucrats read the papers, to be sure that the papers do not insult the political positions ofthe current officeholders.