Dr. garonski is testing his hypothesis that people use hand gestures more in communication when emotionally aroused than when calm. when his results were reviewed, it was noted that dr. garonski sometimes missed seeing small gestures in the calm condition. this is an example of the
conjunctive fallacy
confirmation bias
attribution error
single-variable explanation

Confirmation bias

Explanation:

Confirmation bias can be called wishful thinking. In this process, the confirmation bias is dependent on certain ideas or the concepts that are based on true belief. When a person starts to believe in something then end with believing that things.

This a bias where a person does not collect the new information about the concept just believe in information that he has already have. Confirmation bias is basically about that the person does not see the problem or circumstances objectively. We the people just take that information that satisfies us and just satisfies our prejudice. It is found in anxious people.  

Thus here in the above context, Dr. Geronski when doing his research was biased by the gesture that has seen at the time of arousal but he ignored those small gestures that occur during the calm condition. It shows that Dr. Garonski has confirmation biased.