what are 4 real life reaults of scientific investigations

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1. Test whether dogs react more to smell or to their owner's attention to an object: they have to choose between a plate that smells more of food and a plate their owner paid attention to 2. Test whether dogs can follow their owner's gaze: owners call the dogs and then look somewhere and we see whether dogs follow this gaze (look up gaze-following, it's important for learning!) 3.  Test whether birds can use tools: give bird a long stick and a box with a peanut inside and see if they can use the stick to get the peanut out 4. Test whether vision can develop in the absence of stimulus: bind kitten's eyes at birth and see if they'll develop perfect vision (they didn't...)

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