&amp;gt;&amp;gt; and there you see, that's the reflex. &amp;gt;&amp;gt; this reflex can tell scientists if the snail has formed the memory. &amp;gt;&amp;gt; the longer the gill and siphon remain retracted that's an indication that it's learned what we taught it. &amp;gt;&amp;gt; an aplysia that has not been given any shocks will respond with a short lived contraction. &amp;gt;&amp;gt; there it's out. &amp;gt;&amp;gt; so is that. &amp;gt;&amp;gt; 11 seconds. &amp;gt;&amp;gt; but an aplysia that was taught to be on guard responds much differently. &amp;gt;&amp;gt; now there's a reflex.