Lady Luck

In taking this course, I find myself stumbling upon old thoughts and readings I have analyzed before. While studying for the MCAT, sadly, one of the most interesting articles still lingers in my mind (and hopefully accurate in my description here).
In the study of depressed versus non-depressed peoples, a set of experiments were created in which luck could be attributed to winning events, such as the lottery. Although winning is based on probability, the results showed that people who were not clinically depressed continued to participate in these events. The depressed, however, refused to continue further, even though they were winning consecutively.
The conclusions stated that people who were not depressed felt that they were able to influence their odds of winning, such as their luck, and, therefore, would keep trying to win. The depressed, on the other hand, saw the probability of the events without outside factors and felt they could not influence the outcomes.
Are these conclusions valid? Can we say that luck becomes a factor according to our moods, or, in this case, a certain state of mind? To me, this would suggest that we would be less likely to see a clinically depressed person gamble or depend on good luck charms, such as a rabbit's foot. What we contribute to our actions becomes influenced on how we perceive ourselves. We say that each person has their own perception, but can we say that we each have a set of perceptions, based on what we are feeling? I'm still thinking about this..haha. :)