The story of Phineas Gage would be considered a case study.

According to Vygotsky's sociocultural theory,

A) children master activities through joint activities with more mature members of their society. B) complex mental activities have their origin in perception, attention, and memory. C) adaptation and organization account for changes in children's schemes. D) babies are born with a set of innate knowledge systems.

You are evaluating two groups, with 50 people per group and formed with random assignment,

to see if listening to music when learning a list of words improves later recall of the words. Because you will then rank the participants according to the number of recalled words, and you know the groups are not normally distributed, which of the following tests is most appropriate to determine group differences? A) Mann-Whitney U Test B) rank sums test C) Wilcoxon T Test D) chi-square test for two levels of a single nominal variable E) Kruskal-Wallis H Test