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Winner
#1
Oct21-04, 11:10 PM
P: 98
Hey people ,

I have a question.

Here is the Q:


Question 3: (4 points)

Many baby birds have specific feeding responses that are fixed action patterns elicited by a particular sign stimulus. Nestling starlings are more likely to make a fixed action pattern orienting response to an eliciting stimulus that is higher rather than lower and closer rather than farther away. One way that this can be demonstrated is to hold two thin rods near a nestling starling's head and record which rod the nestling orients towards.

Below are two side views of how you might hold the two rods near a nestling starling's head. In the space below, indicate for both conditions (i.e., A and B) which rod (i.e., 1 or 2) the nestling starling would most likely orient towards and why. Also, which rod position (i.e., A1, A2, B1, or B2) do you think would elicit the strongest fixed action pattern and why? Hint: consider supernormal stimuli.


Well here's my take on it.

in B, the answer is obvious it's 1, because the stimulus is higher and closer than 2.

But in A, it's a bit ambiguous because the question I don't think tells you which state of the stimulus, either closer or higher is more preferred. If I had to chose, I'd pick 1 because the bird obviously doesn't peck downwards for food, and food usu comes from above.

Thanks for any help!

image is attached.
Attached Thumbnails
gullpeck.jpg  
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