HABIT FORMATION IN ALBINO RATS 



29 



TABLE IVa 



THE PRELIMINARY INCLINED PLANE 



DAILY LEARNING AVERAGES OF INBRED AND NORMAL CONTROL RATS 

 (Time in seconds) 



Inbred Average 



Control Average 



Inbred Average 



Control Average 



Inbred Average . . 

 Control Average . 



Day 1 



1965.858 

 2470.393 



Day 2 



1631 . 178 

 971.102 



Day 3 



60.302 

 79.775 



Day 4 Day 5 



45.916 28.116 

 27.564 21.840 



Inbred Average . . 

 Control Average . 



TABLE IVb 



THE PRELIMINARY INCLINED PLANE 

 AVERAGE ABSOLUTE RETENTION OF INBRED AND NORMAL CONTROL RATS. 



Absolute Retention 

 After 60 Days' Rest 



Inbred Average 59.309 seconds 



Control Average 49 . 164 seconds 



TABLE IVc 



THE PRELIMINARY INCLINED PLANE 

 DAILY RELEARNING AVERAGES OF INBRED AND NORMAL CONTROL RATS 



(Time in seconds) 



Day 1 Day 2 Day 3 Day 4 Day 5 



Inbred Average 24.302 9.905 11.516 8.149 7.869 



Control Average 17.102 5.498 5.869 4.262 6.651 



TABLE IVd 



THE PRELIMINARY INCLINED PLANE 

 ANATOMICAL DATA OF INBRED AND NORMAL CONTROL RATS 



Body 

 Length 

 in mm. 



Inbred Average 190.82 



Control Average 189 . 45 



Water 



in Cord, 



Per 



cent 



Inbred Average 71 .436 



Control Average 71 . 128 



