Show dog test est fails fal Is 0 to find ind marvel owners give pets too much credit for brains say scientists NON new york the average dor dog own er cr could write an enthusiastic hook book about hla his pets intelligence wid keenness wit but scientists have only bel gun to penetrate ritte into the doga world to lud flud out carefully and exactly I 1 how biow in much a flog dog sees and understands 7 experiments 4 so ao far made that tho the average dog lins has far more faulty vision lhnn most dog lovi rs suppose according to a survey of what la Is known as dog psychology rondo ninde in tho the quarterly journal of j biology by dr 0 3 J warden ond and III warner psychologists of colum bin university laboratory experiments in kussan Ilus sial and other coun countries countr trios loa have led most psychologists to believe that the tie dog has haa little or no ability to see sec colors A puppy that seems to know red from green may be responding to a ferince dIf in the brightness ot of the two colored objects or some soine other clew that hla his human friends over look A dogs vision for still objects appears to be decidedly inferior to mat of a man but he la Is keenly sensitive to moving objects the evidence indicates sense of smell superior A dogs sense of smell appears tirs to ho he far superior to that of a roan man the psychologists report in their survey A german shepherd dog for example was able in every instance to pick out a small piece of pine wood clial had beer been handled by tier her keeper even when tile the piece of wood was MIS placed with na as many as twenty other pieces that lie he lind had never touched two seconds contact between tile the keepers hand anti and the object was sufficient Bum clent to insure the be dogs identifying the keeper with the object on the other hand police dogs were it rested tested in germany by them mein the ue glove of a person and tell ing them to pick out the owner from a row of nien men the dogs all failed on toils test find on a of other tests intended to prove their usefulness in police work As a result of the tests the use of dogs in criminal detection was forbidden b hn the me prussian government it Is not clear tire the columbia paint out whether the logs dogs mcall understood what was wanted of them in these tests testa question of understanding whether dogs recognize words as a human being does or whether whet lier they respond to sounds or merely to tone and inflexions ions of tile the voice W nol agreed upon by experimenters in tests with the thoroughbred lennan nog dog fellow recently ninde by doctor warden and mr fr brimer the dog responded to word used in various commands given by tila waster muster jacob li herbert erbert of detroit in ninny many cases mr herbert gave the from in an room with the door closed thus showing that the dog lid did not depend or on watching his nin musters face or tures for clova clews taking commands through a closed door was new to pe fellow I 1 I 1 0 and tite voice was waa but he made a good record though not a 0 perfect one one of the chief reasons why scientists disagree on tile the dogs ties la is that alt all sizes sixes anti sorts sort of doss have havo been used in experiments from froin highly brei bred baill terriers to nn an assortment of mongrels mon tilon grels the psychologists point out A breed of dog should be settled upon for systematic lei natle study they suggest |