*dilemma unfamiliar food -birds dietary wariness, little known *test wariness , colored foods -prior experience sufficient -neophobia, little needed -extensive for other novel food. Need physical contact -observational learning sufficient -reinstating easily achieved *little dietary wariness -color food reduce N -familiarized less hesitant -another example *D require contact -observational learning not sufficient -surprising for chick *mental image -color not salient part
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