HABIT FORMATION IN ALBINO RATS 



11 



TABLE Ic 

 The Maze 



Daily Relearning Averages of 



(Time 



Day 1 



35.415 



28.574 



Day 6 



7.672 



7.076 



Day 11 



6.200 

 5.508 



Day 16 

 5.634 



5.970 



Day 21 

 6.046 



5.614 

 Day 26 



6.166 

 5.300 



• Day 31 



5.901 



5.300 



Day 36 



5.920 



5.300 



Day 41 



.... 5 . 657 



5.300 



Day 46 

 6.032 



5.300 



Inbred Average . . 

 Control Average. 



Inbred Average. . 

 Control Average. 



Inbred Average . . 

 Control Average . 



Inbred Average. . 

 Control Average . 



Inbred Average . . 

 Control Average. 



Inbred Average . . 

 Control Average. 



Inbred Average. . 

 Control Average. 



Inbred Average . . 

 Control Average. 



Inbred Average . . 

 Control Average . 



Inbred Average. . 

 Control Average. 



Inbred Average . . 

 Control Average. 



Inbred and 

 in seconds) 



Day 2 



12.208 

 18.752 



Day 7 

 7.659 



6.064 



Day 12 



5.966 

 5.434 

 Day 17 

 5.669 



5.424 



Day 22 

 5.834 



5.300 



Day 27 



5.697 

 5.300 



Day 32 

 5.905 



5 300 



Day 37 



5.956 

 5,300 



Day 42 

 5.848 



5.300 



Day 47 



5.815 

 5.300 



Failed 

 to releam 

 ... 2 

 ... 



Normal Control Rats 



Day 3 



10.069 

 9.530 



Day 8 

 6.642 

 5.922 



Day 13 



6.067 

 5.430 



Day 18 

 5.680 



5.490 



Day 23 



5.844 

 5.300 



Day 28 

 5.914 

 5.300 



Day 33 

 5.640 



5.300 



Day 38 



5.903 

 5.300 



Day 43 

 5.779 



5.300 



Day 48 



5.920 

 5.300 



Day 4 

 9.560 



7.996 



Day 9 



6.232 

 5.670 



Day 14 

 5.660 

 5.414 

 Day 19 

 6.029 



5.354 



Day 24 

 6.061 

 5.300 

 Day 29 

 5.842 



5.300 



Day 34 



5.846 

 5.300 



Day 39 

 5.766 



5.300 



Day 44 



5.745 

 5.300 



Day 49 

 5.762 



5.300 



Days required 



to relearn 



12.68 + 



5.75 



TABLE Id 



The Maze 

 Anatomical Data of Inbred and Nor\l\l Control Rats 



Body Body Brain 



Length Weight Weight 



in mm. in grms. in grms. 



Inbred Average 195.38 180.55 1.71122 



Control Average 191 .00 171 .41 1 . 74930 



Day 5 

 8.069 



6.548 



Day 10 

 6.604 



5.630 



Day 15 

 5.587 



5.468 



Day 20 



5.718 

 5.440 



Day 25 

 5.771 

 5.300 

 Day 30 

 5.817 

 5.300 

 Day 35 

 5.939 



5.300 



Day 40 

 5.726 

 5.300 



Day 45 

 5.861 

 5.300 

 Day 50 

 5.697 



5.300 



Water 

 in Cord 

 per cent 



Inbred Average 71 . 723 



Control Average 71 . 666 



Per cent 

 Brain Weight 

 in Relation to 

 Body Length 



.87685 



.91745 



Cord 



Weight 



in grms. 



.52852 



.52740 



Per cent 



Brain Weight 



in Relation to 



Body Weight 



.97052 



1.05479 



Water 

 in Brain 

 per cent 

 78.497 

 78.319 



Age 

 killed 

 Days 



200 

 186 



