Approximately ____________ of elementary school aged boys are unable to do more than one pull-up

Assessment instruments that are designed to tap unconscious feelings or motives are called

a. objective tests. b. projective tests. c. double-blind tests. d. single-blind tests.

Zoologists have attached minaturized cameras called "critter

cams" directly to many species allowing observations in a wide range of natural environments with the use of these tiny cameras minimizing the a. single-blind effect. b. double-blind effect.. c. observer effect. d. effects of extraneous correlations.