I don't think that was the scenario laid out, although I believe the overall article has merit, the anecdote is not a good one for representation of confidence

I don't think that was the scenario laid out, although I believe the overall article has merit, the anecdote is not a good one for representation of confidence as it impacts success. Linda is smart enough to know she might not be right; smarter quiz players (pub quizzes, Jeopardy, etc) don't blurt out an answer to every question. Claiming someone should 'be more confident' in this case indicates that she knew for a fact that she had the right answer but wasn't assertive. This ignores the more likely scenario: she didn't actually know if she was right. Yes, the article is stating Linda needed to be more confident - but out of context, what if Linda had tried being more confident and assertive in previous games and had been completely wrong, costing her team the match?