Answer:This is an example of suggestibility
Explanation:
Suggestibility occurs when someone makes a suggestion that seems reasonable enough to be true eventhough it may not be true we may find ourselves inclined to use that suggestion in order to bridge the gap in our own memories as we try to remember the information about the same situation.
One of the eyewitness yelled the blue shirt when the bag was snatched it is very likely that others believe he must have seen the person so they all use this suggestion as they testify and that is the effect of suggestibility