Choosing employees by mental and physical tests . e none completed thewhole pattern in the time allowed, a number made ashigh as ten and some twelve. It will be noted that these two ambidextrous tests arevery distinct in character. The first one requires littlemental effort, only quick, action of fingers and second one requires distinct mental as well ashand control. 214 CHOOSING EMPLOYEES A record of the difference between the right and lefthand can be secured from the finger-dexterity tests be-fore described. As will be remembered, the left handsets up an average of fifteen matches
Choosing employees by mental and physical tests . e none completed thewhole pattern in the time allowed, a number made ashigh as ten and some twelve. It will be noted that these two ambidextrous tests arevery distinct in character. The first one requires littlemental effort, only quick, action of fingers and second one requires distinct mental as well ashand control. 214 CHOOSING EMPLOYEES A record of the difference between the right and lefthand can be secured from the finger-dexterity tests be-fore described. As will be remembered, the left handsets up an average of fifteen matches against sixteenfor the right, showing little difference in simple fingeroperations, and showing how quickly the left handcould be trained to do things as well as the right. Fewsubjects made as high a difference as three in the rec-ords of their hands, and the greatest variance was six;but this last was a girl who showed phenomenal right-hand dexterity, making twenty-two, or six above aver-age, and making only one above average for her The Ergograph Courtesy of C. H. Stoelting Co., Chicago The ergograph is used for fatigue tests. The arm and fin-gers are strapped in a certain position and the fingers pull aweight up by repeated operations, the action being recordedby waving lines on the cylinder shown. As fatigue increasesthe waves become larger. This test is theoretically usefulwhere continuous pulling operations are liable to fatigue thehand. ACTION 215 There is a large field for the application of ambidex-terity in factory work; and there are advocates for itsapplication to general life, who hold that our one-handed world is all wrong. Certainly, as someone sug-gests, we could produce better work if we divided itmore evenly between the two hands, each hand develop-ing its special lines. Grip Strength of grip is a factor in a number of occupa-tions, very small, but yet enough to make a differencebetween accuracy and guess work. In one line of testswhere we were try
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