"Clever Hans was a horse who could answer questions about math, music, clocks and more, and studying how he did it led to the development of the double-blind study"--
Awards:
ISBN–13: 9780525514985
Publisher: G.P. Putnam's Sons Books for Young Readers
Publication Date: May-2020
Pages: 32
Lexile Level: 0000
Ages: 04 - 08