Randomizing blocks / trials with no replacement

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Randomizing blocks / trials with no replacement

Randomizing blocks / trials with no replacement

Author	Message
Karoline	Karoline posted 6 Years Ago Topic Details Share Topic
Group: Awaiting Activation Posts: 6, Visits: 49	Hi, I'm trying to create an experiment, in which I want to randomize 3 different blocks (each with different trials) and display a survey (in running number) after each block. I've found a forum discussion (https://www.millisecond.com/forums/Topic23902.aspx), which had some similarities, but instead of displaying the survey with a branch element I want to include it in the experiment element. Furthermore, I want to somehow randomize the experimental blocks and eliminate the possibility that one block is displayed more than once. So at the end, I want the following order of my experiment: Part 1: randomized Block 1 or Block 2 or Block 3 Survey 1 Part 2: randomized Block 1 or Block 2 or Block 3 (no repeating of the same block as in Part 1) Survey 2 Part 3: randomized Block 1 or Block 2 or Block 3 (no repeating of the same block as in Part 1 and 2) Survey 3 Is there any way to write a code for this? Any help will be very much appreciated. Thanks!
	Reply Like 45
Dave	Dave posted 6 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 12K, Visits: 98K	+x Karoline - Monday, November 26, 2018 Hi, I'm trying to create an experiment, in which I want to randomize 3 different blocks (each with different trials) and display a survey (in running number) after each block. I've found a forum discussion (https://www.millisecond.com/forums/Topic23902.aspx), which had some similarities, but instead of displaying the survey with a branch element I want to include it in the experiment element. Furthermore, I want to somehow randomize the experimental blocks and eliminate the possibility that one block is displayed more than once. So at the end, I want the following order of my experiment: Part 1: randomized Block 1 or Block 2 or Block 3 Survey 1 Part 2: randomized Block 1 or Block 2 or Block 3 (no repeating of the same block as in Part 1) Survey 2 Part 3: randomized Block 1 or Block 2 or Block 3 (no repeating of the same block as in Part 1 and 2) Survey 3 Is there any way to write a code for this? Any help will be very much appreciated. Thanks! Yes, this is easily possible. It goes like this: <expt> / blocks = [1,3,5 = noreplace(block1, block2, block3); 2 = survey1; 4 =survey2; 6 = survey3] </expt>
	Reply Like 35
Karoline	Karoline posted 6 Years Ago ANSWER Post Details Share Post
Group: Awaiting Activation Posts: 6, Visits: 49	Thanks for your immediate answer! That really helped a lot - I didn't realize that it's that easy and that I just can randomize separated blocks (1,3,5). So thanks again :)
	Reply Like 36