Effects of some fact〔 )rs oll relation betweell visual search and 孟 ntemal representation were examined in real behavioral situations : knowledge ln Bonsai appreciati 〔, 11, way of concern in an assembly task , skill in piano playing froln a vicwpoillt of perceptual − motor coerdinat . ion and usefu ] field of view , and , dcmands in automobile driving frQm a viewpoint of useful fie 】 d of view . Skill alld knowledge are prerequisites for fornlation of ethcient and appropriate representatjon .

more »

... his was demonstrated through scan − path , span 〔 〕f preview , useful fie 】 d of view , and temporal stability of porceptual ・ mot 〔 }r c () ordinati 〔 〕n . Furthermure , establishment of proccdure of behavior was suggested to be signi 丘ca1 ユt for formation ofrepresentation . On the ot } 〕er hand, it was dcm 〔 )nstrated that useful field of vie " T becomes narrower under demanding gituations hecause of limitation of attentiDn reSOUrCe . Key words ; visual search , visual attenti 〔 ,n , skil ] , kn ( ,wledge , useful 丘eld of view , eye movement