Participant 1
Initial description: There were 5 spaces between each black box on the first blue line. Then there were 5 spaces on a couple of following blue lines. There was one space less on alternating blue lines.
Final description: I honestly could not figure out any rule. It all appeared random which is why I could not solve the problem.
Participant 2
Initial description: Blue lines on a black background with pink square in middle.
Final description: Pink square on black background is getting larger on the middle of the grid.
Participant 3
Initial description: The pink block changes the blue blocks that are diagonal from it to yellow.
Final description: All of the blocks diagonal from the pink block are turned yellow maintaining the four block pattern. Either the horizontal or vertical rows retain their color dependent upon the size of the grid being wider or taller. If it's taller then it's the horizontal row. If it's wider then the vertical column.
Participant 4
Initial description: I focused on the end pieces and ones that were a upside down C or a upwards C.
Final description: I thought maybe it was just the curves boxes and less the edges.
Participant 5
Initial description: I think it's the shape of a butterfly with the pink part in the center and yellow wings.
Final description: It is the shape of a butterfly with the pink part in the center, and the yellow wings starting at the four corners of that pink part and decreasing by two blocks every two rows.
Participant 6
Initial description: Everything surrounding the blue became linked to the pink.
Final description: I can't get the color pattern
Participant 7
Initial description: Pink square in the center, blue near the middle sections and yellow towards the outer parts.
Final description: I thought I was doing the correct thing initially but there was something I couldn't figure out.