Back-Chaining: A teaching methodology, where the training of the chained behaviors occurs in reverse order. The final behavior is taught first, and the second-to-last behavior is added and taught next, and so forth.

For example: the very first behavior a back-chained 'live find' dog is taught: is to play with new humans (the reward). For a Stay-and-Bark, the second behavior would be to 'bark at a stranger' and then play. 

">Back-Chaining
 : A teaching methodology, where the training of the chained behaviors occurs in reverse order. The final behavior is taught first, and the second-to-last behavior is added and taught next, and so forth.

For example: the very first behavior a back-chained "live find" dog is taught: is to play with new humans (the reward). For a Stay-and-Bark, the second behavior would be to "bark at a stranger" and then play. 

Behavior Chain: a series of learned behaviors, carried out, after one command. 

">Behavior Chain
 : a series of learned behaviors, carried out, after one command. 

Blank Search: A training or certification exercise in which the target odor is not present  

">Blank Search
 : A training or certification exercise in which the Target Odor: (aka Source) odors which detector dog are trained to detect. 

">target odor
 is not present  

Author: Scientific Working Group on Dog and Orthogonal detector Guidelines (SWGDOG)
Blind: A training exercise is considered Blind if the person person searching does not know the location of odor(s), and/or if any are prescent, BUT the accompanying Instructor/Evaluator DOES know.

">Blind
 : A training exercise is considered Blind: A training exercise is considered Blind if the person person searching does not know the location of odor(s), and/or if any are prescent, BUT the accompanying Instructor/Evaluator DOES know.

">Blind
 if the person person searching does not know the location of odor(s), and/or if any are prescent, BUT the accompanying Instructor/Evaluator DOES know.

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VSRDA Glossary