[Solved] Timing glitch?
Good afternoon everyone,
I have a question about a possible timing glitch. I'm developing an OS experiment, but I have the feeling some items appear sooner than they should. What could I do to fix this?
Participants first hear the first syllable of a Spanish word over their headphones (e.g. SÁ_), and at the word offset they see a word on a screen which is either a complete match (SÁBADO), a match but with stress on a different syllable (e.g. SALÓN), a mismatch (e.g. MOSQUITO) or a non-word (e.g. FÍTULA). They need to judge whether the word exists in Spanish or not, yes or no (SÍ/NO). Presumably their response time is faster when seeing the matching prime (the target word would have been primed in their minds).
Open Sesame situation:
Four asterisks are presented in the middle of a screen ****. This is a sketchpad item, duration 0 ms. The next item plays an audio file, duration 'sound'. As the duration of the sketchpad item is 0 ms, the asterisks and the audio file are presented simultaneously, and the presentation of these items takes as long as the audio file takes to play (because: duration 'sound').
Then the target word is presented in the middle of the screen. This is a sketchpad item, [target_word], but it's often presented before the audio file has stopped playing.
Why is this and what can I do to remedy it?
Many thanks in advance,