Millisecond Forums

Hi, 

I am relatively new to inquisit and have started to create some experiments as well as surveys. In one of the surveys, I am measuring BMI. Due to the fact that there are differences across gender when it comes to categorizing people based on their BMI, I wanted to use the raw BMI score in order to assign people to different weight groups conditional on sex. I have used a nested statement within an expression in order to do so. As long as I don't include this newly created expression within my summary data everything is fine, but once I enter it, inquisit shuts down at the end of the survey after all survey items have been filled in and  the finish button has been pressed. Strangely, I am able to run the survey, and I don't get any kind of error messages. This makes it hard for me as a novice to figure out what exactly is wrong with my code. Since I don´t get any summary files for these runs, I am absolutely sure that the problem arises due to adding this expression to the summary data. 

This is the code for the expression: 
/ BMICAT = {(if radiobuttons.Geschlecht.response == 1)
{
if (expressions.BMI < 20)
{
expressions.BMICAT == 1;
}
else if (expressions.BMI >= 20 && expressions.BMI < 25)
{
expressions.BMICAT == 2;
}
else if (expressions.BMI >= 25 && expressions.BMI <30)
{
expressions.BMICAT == 3;
}
else if (expressions.BMI >= 30 && expressions.BMI < 35)
{
expressions.BMICAT == 4;
}
else if (expressions.BMI >= 35 && expressions.BMI < 40)
{
expressions.BMICAT == 5;
}
else if (expressions.BMI >= 40)
{
expressions.BMICAT == 6;
}
}
}

This is just the code for males (thus having answered radiobuttons.Geschlecht with response 1). 

Hope that somebody can help me out and tell me what exactly went wrong, so that I can adapt the code. 

Cheers, 

Kugel