Steph are you really studying gambling, or have you already drawn conclusions and are looking for those who will justify you hypthosis?
i.e. questions like....when did you stop beating your wife?
with 4 options
I still beat her
Now if you don't beat your wife the nearest/best option is last month......but is is still a lie and very misleading
See my point?
I have tried to help with these types of "Studies" in the past and can't get past the first question unless I lie cos they already know what they want to find
Do you want successful Gamblers or are you looking for people with a "problem" to start with?