The writers took the photo story and changed the words into a pottery story, to add some variety.
The photo story isn't the whole story.
Did the students know that the professor would also choose which were the best photos ?
The "quality" group were only required to produce one photo, but were they allowed to produce 100 photos?
If so, did the professor include all those photos when they chose which were the best photos ?
If not, did the professor look at a much larger sample of photos from the "quantity" group than the "quality" group to decide which were the best photos?
The photo story isn't the whole story.
Did the students know that the professor would also choose which were the best photos ?
The "quality" group were only required to produce one photo, but were they allowed to produce 100 photos?
If so, did the professor include all those photos when they chose which were the best photos ?
If not, did the professor look at a much larger sample of photos from the "quantity" group than the "quality" group to decide which were the best photos?