Rose-tinted? (Score 2, Interesting)

The team then gave half the students problems that were slightly easier than the first set, while half were given more difficult puzzles. This ensured that the students' performances would either exceed, or fall short of, their expectations.

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These people [the optimistic group], who see the world through rose-tinted spectacles, also tend to deny responsibility for their poor performance. Marshall and Brown showed this in a second part of the study, in which students were also asked whether they felt their test performance was a reflection of their ability. The 'rose-tinted' group who did badly in the test tended to believe that it was not.

How is this a "rose-tinted" interpretation? These people are correct to deny responsibility for poor performance, since they performed below their expectations only because they were tricked into doing a harder problem set than expected. I think the optimistic group had a pretty clear interpretation.