CONTENTS 



NUMBER 1 JULY, 1917 



Announcement 1 



The retention of habits by the rat after destruction of the frontal portion of 



the cerebrum. S. I. Franz and K. S. Lashley 3 



Action of some opium alkaloids on the psychological reaction time. D. I. 



Macht and Schachne Isaacs 19 



On cerebral motor control: the recovery from experimentally produced 



hemiplegia. Robert Oden and S. I. Franz 33 



The effect of delayed feeding upon learning. John B. Watson 51 



Internal secretion in learning. (Discussion) Knight Dunlap 61 



NUMBER 2 SEPTEMBER, 1917 



Continuous stimulations versus continuous shock in the phototactic response. 



S. J. Holmes 65 



The effects of cerebral destruction upon habit-formation and retention in 



the albino rat. H. S. Lashley and S. I. Franz 71 



The effects of strychnine and caffeine upon the rate of learning. K. S. 



Lashley 141 



The stop-watch and the association test. Knight Dunlap 171 



NUMBER 3 NOVEMBER, 1917 



On the motor functions of the cerebral cortex of the cat. Joseph Duerson 



Stout 177 



Relative values of reward and punishment in habit formation. J. D. Dodson 231 



NUMBER 4 JANUARY, 1918 



A classification of groups. Carl W. Bock 277 



A synchronous motor kymograph. Knight Dunlap 319 



Dunlap's method for the mean variation. Buford Johnson 325 



Action of some antipyretic analgesics on psychological reaction time. D. I. 

 Macht, S. Isaacs and J. Greenburg 327 



NUMBER 5 MARCH, 1918 



Some notes on the auditory sensitivity of the white rat. Walter S. Hunter. . . 339 

 A simple maze: With data on the relation of the distribution of practice to 

 the rate of learning. K. S. Lashley 353 



NUMBER 6 MAY, 1918 



Methods of studying controlled word associations. Mildred West.Loring. . 369 



Word-lists for adjective and noun reactions. Mildred West Loring 429 



Methods of using balanced magnet chronoscopes. Knight Dunlap 445 



Discriminative responses to visual stimuli. H. M. Johnson 459 



Index 495 



iii 



