"eye-brows", "first rank" / "first-rank",
"four fifths" / "four-fifths", "Hans problem" / "Hans-problem", "head
jerk" / "head-jerk", "head movement(s)" / "head-movement(s)",
"hoped for" / "hoped-for", "memory images" / "memory-images",
"movement impulse" / "movement-impulse", "movement responses" /
"movement-responses", "number concepts" / "number-concepts", "number
terms" / "number-terms", "psychophysical" / "psycho-physical", "some
one" / "someone", "sound waves" / "sound-waves", "thought processes" /
"thought-processes", "tieraugen" / "tier-augen", "time measurements" /
"time-measurements", "training process" / "training-process", "vaudeville
stage" / "vaudeville-stage", "well disposed" / "well-disposed", "well
known" / "well-known", "well trained" / "well-trained" "zoologist" /
"zooelogist", "Zoological" / "Zooelogical".

There is no direct reference to Table of Reference item 105 or 112
within this book.

Here is a list of the minor typographical corrections made:

- Bracket removed following "1904" on Page vii
- "VI" changed to "IV" on Page vii
- Hyphen added between "September" and "Commission" on Page vii
- "vice versa" italicized on Page 20
- Double quote added after "'Hans'?" on Page 36
- "elasping" changed to "elapsing" on Page 50
- Bracket removed following "utility." on Page 58
- "Futhermore" changed to "Furthermore" on Page 67
- "wtih" changed to "with" on Page 77
- Comma removed after "Problems" on Page 78
- Comma removed after "errors" on Page 82
- Comma removed after "errors" on Page 82
- "reponse" changed to "response" on Page 83
- Comma changed to period after "one" on Page 83
- Period added after "Mr" on Page 89
- Comma added after "continuously" on Page 91
- "preceive" changed to "perceive" on Page 98
- Double quote added before "Inhalt" on Page 115
- "concrn" changed to "concern" on Page 116
- "of" changed to "is" on Page 122
- "is" changed to "of" on Page 122
- Period removed after "I" on Page 127
- "to to" replaced by "to" on Pages 135 and 136
- Period added after "50cm" on Page 138
- Double quote added after "you?" on Page 146
- Double quote removed after "Perseverationstendenz" on Page 150
- Comma removed from before "continued" on Page 154
- "proceesses" changed to "processes" on Page 156
- em-dash changed to hyphen between "soixante" and "six" on Page 159
- "baguette")" changed to "baguette)"" on Page 160
- "role" chang