A research on perception of pitch 1. The problem statement, all variables and given/known data I've been working on a project. It's regarding the human perception of sound. I basically tested around 100 human subjects and made a report of it. The data of 60 individuals is in "google_science_fair..zip" attached with the post. Here's what I exactly did as part of the test. Step 1) I asked them to listen to 10 sounds (tones actually). Each tone had a number assigned. The ten tones are of 1.)100 Hz 2.)150 Hz 3.)200 Hz 4.)300 Hz 5.)400 Hz 6.)450 Hz 7.)500 Hz 8.)550 Hz 9) 650 Hz 10)700 Hz (You can find all the sounds in an attachment called "named.zip") Step 2) After this I took a test of them. They were made to listen to 5 sounds and they were supposed to identify what Sound number is being played. The participants were clearly told that it doesn't matter how accurate they are. The motive was to associate a higher number for sounds of higher frequency. Step 3) I also asked their age after this to note down. Now for every test of 5 sounds I conducted on any individual, the First sound and the Third sound were always same (500 Hz), however the subjects always gave a different rating to the two sounds. And the difference in the rating seemed to depend on the 2nd sound. Apart from this a consistent observation is also that for some reason participants tend to rate a larger number to 300 Hz sound than to a 500 Hz. Even after being very clear that a higher frequency sound means a larger number, the 300 Hz sound seemed to some as higher pitched sound than the 500 Hz sound. Why did this happen? And is there any other conclusion that could be made from the data? Please analyze the data carefully. I've worked hard for this. 2. Relevant equations No equations involved. 3. The attempt at a solution My two conclusions 1.) Even if two sounds of same frequency are played with another sound in between, subjects may perceive it differently depending on the sound played in between. 2.) Sometimes an subjects fail to identify if the pitch has increased or not. there seems to be some relation of this with regard to what sounds they're accompanied with. Anything I'm missing? Any suggestions would be accepted. Also, I'd love to be told where I went wrong.