Cross-modal priming experiment help!

rfritche

Hello, I'm a grad student in way over my head. I had no trouble with the tutorial, but as I've been working on my design, I've realized I've got problems I don't know how to solve:

I have a number of visual target words, which are preceded by a prime (out of 3 specific possible audio primes - each target has its own trio of primes). I don't know how to make the sampler randomly select one of the three primes depending on which target word is displayed after the prime. I don't even know how to get the sampler to randomly select a sound file. Each visual target must be displayed only once.

I think I figured out how to change which target word appears, but in the block loop, the column names keep changing on me. So as far as the program is concerned, there is no variable called 'target_word'. I'm running out of time and I'm getting desperate. If someone can give me advice that will make this work, I may be grateful enough to compensate!

rfritche

I got the target words to work (I cut and pasted and the block sequence changed the titles again, but I was able to make 'correct_response' the first column and 'target_word' the second and then I just chose one sound file so I could at least see if the target words displayed), though I can't see the accuracy data in the results. I still have no idea how to program the primes or how to add that into my variables. I don't want my targets to display more than once each, or I'd enter all the primes in separate rows.

rfritche

The accuracy is always logging as 0% and I don't know why. Also, I just cannot get the columns to stay the way I want in my block loop.

rfritche

Oh, I should maybe mention that this is a lexical decision task - they hear a prime, see a target word, and respond whether the target word is a real word in English. I want to measure accuracy and response time.

eduard

Hi,

Can you share your experiment? This will make it easier to help.

Some general advice:

• make sure your logger and feedback items are at the correct level in the sequence (see the tutorial)
• to choose a random prime, make lists with all the primes in inline_scripts before the trial loop and then randomly chose one of them (using the random.choice() function in the random module). For that you have to use python coding in inline_scripts.

Eduard