I’d like to give this one more shot (I promise this will be my last attempt!). There are a couple reasons why the original might not have worked. First, people might have been using the visual progress of the audio player to help determine whether the clips were slowing. I’ve corrected that by narrowing the width of the player so you can’t see the progress of the clip as it plays. Second, because the notes were long piano notes, listeners might have heard differences in the tonal quality of the notes as they were played longer. I’ve corrected that by using a synthesizer voice, and now all the notes are staccato, and therefore the same length. I’ve also added a “held steady” option to the polls, in case you believe the excerpt has neither sped up or slowed down.
Otherwise, the instructions are the same as before. Play each clip, and listen to see if the tempo (rate the notes are played) is speeding up or slowing down. Some of them really are speeding or slowing (and they’re different from yesterday), so listen carefully. After we’ve got some results, I’ll let you know which ones actually sped up or slowed down, and we’ll see if we’ve managed to replicate Vos et al.’s study.