Researchers using observational assessment techniques on infants must not overgeneralize and must base their conclusions on data from many studies. | On the basis of the data from one or two studies, it seems that some infants develop a particular perceptual ability not observed in others. | To use data from one or two studies on infant's perceptual abilities, it is necessary to use techniques that will provide conclusive evidence. | When researchers fail to make generalizations from their studies, their observed data is often inconclusive. |
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