Perceptual constancy enables people to Select one or more: a. realize that retinal images of objects remain the same across viewing distances b. realize that both the upper and lower bars in the Ponzo illusion (Fig. 4.30) have the exact same length c. realize that a person walking away from them is not getting smaller d. perceive a sequence of still images to be continuously moving

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.