Question: The authors explored the relationship between children's age and their attitudes toward and understanding of death (ATCD scale). The article reports that "younger children were more likely to score high on this scale at pretest (r=-.47, p<0.01) and to score lower at posttest (r=-.29, p<.15) " (p. 413).

(a) Why did the authors use Pearson's r to assess the magnitude of this relationship?

(b) Describe^' in your own words the meaning of the expressions "r=-.47, p<.01" and "r=-.29, p<0.15."