... youngest grade, who showed a Mean IQ gain of 15.4. In the top two grades however, there was actually a marginal decrease in Mean IQ gain in the experimental group, with a Mean loss of 0.7. The results tabulated in the article also give the percentage of children in grades one and two that achieved an IQ gain of 10 points, 20 points and 30 points. The most common increase for the pupils as a whole taking both the control and experimental groups into account is 10 points. 30% more pupils in the experimental group achieved this result than the control group. This was one of the first studies of its kind to be conducted in the field of educational psychology and the results were groundbreaking, attracting a lot of interest both in the field itself and in the popular press. A great deal of emphasis was therefore placed on ...

See this essay or coursework document in full right now