Millisecond Forums

Hi Dave,

In a block with two different type of trials I would like to "enable" the experimenter to choose how many trials per type to run.
The trials will need to be randomised in the block.

I have done this presenting in the instructions a textbox where the experimenter type the total number of trials and then a slide when s/he can specify the probability a certain type of trial is presented.

It works fine-ish with a list and setting the pool as the total number of trials and the item probabilities as a slider in the instructions that the experimenter can select.

However, rather than using the decimal value as itemprobabilities I would like to use the exact number of trials per type, so I can make sure that the exact number of trials is presented per type.

As one option I was thinking to allow the experimenter to exact the number of trials per type (as integer) and then transforming it in decimal points (that similar to what I am doing) but I was wondering if there was another options.

Thanks