HANDLER 



Figure 5. Dividing pen ( training facility), dog in one 

 half of pen. 



Section II. THE 



28. General 



The search chain (fig 7) is a sequence of events 

 whereby the procedure outlined in paragraphs 

 20 through 27 is used to shape the dog's behavior 

 toward some practical task (e.g., obedience exer- 

 cise, finding people, boobytraps, and the like). 

 In the same manner as the dog's behavior was 

 shaped to go to a particular spot in the pen, it 

 can be shaped to perform almost any desirable 

 action. 



29. Basic Search Chain 



The basic search chain can be diagramed as an 



I 



HANDLER 



Figure. 6. Dividing pen, quadrant. 



SEARCH CHAIN 



unvarying, continuous sequence of simple events 

 as follows : 



Si + Rx Rf, -f S 2 + R 2 Rf 2 -+ 



As an example, the above sequence can be read 

 as, "The First Stimulus (S) (a feed pan) plus 

 the First Response (R) (going to the feed pan) 

 leads to the First Reinforcer (Rf) (Good + 

 food) which leads to the opportunity to go to 

 the feed pan again which leads to "Good" + 

 food which leads to " 



30. Pairing 



The primary purpose of the search chain is to 



12 



