Alex was a remarkable African grey parrot who was able to
a. ask for crackers and nuts in several unrelated languages.
b. recognize colors, shapes and numbers of objects and answer questions about them in English.
c. sing Italian operatic arias in both perfect pitch and with a perfect accent.
d. correctly name pictures of hundreds of other kinds of birds about 80% of the time.
b
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a. Pearson’s r c. phi coefficient b. Spearman rho
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Indicate whether the statement is true or false