Ad is standard, the headline grossly misrepresents the story. What The research actually observed is that in the presence of an observing angry/disapproving person, the kids were cowed, hestitant to play. Kids not stated down by the angry person played more freely. That suggests that kids are scared of angry people, not that kids tried to avoid making the person angry. Ad is common for psych studies, they read far too much into one behavior delta, and don't try multiole configurations to tease apart the many possible interpretations.