The senior author has previously shown that the O'Connor Block Test requires at least four time-limit trials of two minutes each to obtain a reliability of .80. A total of six trials are required to bring the reliability up to .85. If the number of subjects to be tested is large this procedure requires a large amount of the examiner's time and somewhat limits the usefulness of the test.
Proceedings of the Iowa Academy of Science
©1952 Iowa Academy of Science, Inc.
Phillips, J. J.; Green, M. C.; and Kjerland, R. N.
"The Validity of a Pencil and Paper Version of the O'Connor Block Test [Abstract],"
Proceedings of the Iowa Academy of Science, 59(1), 392-392.
Available at: https://scholarworks.uni.edu/pias/vol59/iss1/53