10. Usingconsistentsignalsorwordsforthesemessagesenablesthe dogto
understandthem more quickly. If the handler sometimes says "good" as a
reward marker andsometimesasabridge,itisdifficultforthedogtoknow
whenhehasearnedareward.Rewardscanbetreats,play,praise,oranything
thatthedogfindsrewarding.Failuretorewardaftertherewardmarker
diminishesthevalueoftherewardmarkerandmakestrainingmoredifficult.
11. These four messages do not have to be communicated with words, and
nonverbalsignalsareoftenused.Inparticular,mechanical clickersare
frequentlyusedfortherewardmarker.Handsignalsandbodylanguagealso
playanimportantpartinlearningfordogs.
12. Dogs usually do not generalize commands easily; that is, a dog who has
learned acommand in a particular location and situation may not
immediately recognize thecommandtoothersituations.Adogwhoknows
howto"down"inthelivingroommaysuffergenuineconfusionifaskedto
"down"attheparkorinthecar.Thecommandwillneed to be retaught in
each new situation. This is sometimes called "crosscontextualization,"
meaningthedoghastoapplywhat'sbeenlearnedtomanydifferentcontexts.