Fixed action pattern: Difference between revisions

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The sight of the egg outside of the nest serves as the stimulus in this particular instance because it is only after the recognition of the egg's displacement that the fixed action pattern occurs.<ref name=":0" /><ref name=":1">{{cite web |last1=OpenStax College Biology |title=Behavioral Biology: Proximate and Ultimate Causes of Behavior |url=https://cnx.org/contents/GFy_h8cu@10.53:rZudN6XP@2/Introduction |website=cnx.org |date=21 October 2016 |access-date=20 November 2018}}</ref>
 
The manipulation of the sign stimulus through a series of experiments can allow scientists to understand what specific component of the stimulus is responsible for the innate behavioral sequence. If the egg were to be picked up and taken away after it is displaced from the nest, the goose still exhibits the same head moving motion even though there is no egg present.<ref name=":0" /> This was put to the test by using objects such as beer cans, and baseballs. Experimenters found that the stimulus merely had to be an object that was large enough in size, convex enough in shape, and comfortable enough for the goose to lay its neck around the edges of the object.<ref name=":0" />
 
These features that the stimulus has to obtain in order to trigger a resulting FAP were then given the official term of Sign Stimuli. Scientists came to the realization that there must be an innate deciphering method that the goose goes through in order to determine a suitable sign stimulus. This was defined as an [[innate releasing mechanism]] (IRM). The goose's IRM when put to the test in the natural world not being manipulated by scientific experimentation is almost always efficient in getting the desired item of an egg back into the nest.<ref name=":0" />