When parents and teachers use sound blending activity (after hearing individual sounds of a word, the child puts them all together to form the word), you should use words that have no more than sounds.

51% were unhappy, i think .   ; )

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.