A critical analysis of the attention hypothesis of Zeaman and House: problems of parameter interactions in multiparameter models

The attention hypothesis of Zeaman and House [in N. R. Ellis (Ed.), Handbook of mental deficiency. New York: McGraw-Hill, 1963] was examined through a systematic, computer-simulation analysis of the parameter interactions found in the One-Look model. The hypothesis states that mental retardates and normals differ in their initial attention habits but not in their learning rates in the context of discrimination learning. The analysis showed that possible differences in the learning rates cannot be ruled out. The result was used to suggest how shift designs can unconfound the effect of the attention habits from the effect of the learning rates and maximize chances of observing possible differences in the learning rates between retarded and normal children.