Mentally retarded children's abilities in the process of comparison.

@article{Grieve1982MentallyRC,
  title={Mentally retarded children's abilities in the process of comparison.},
  author={Richard Grieve},
  journal={American journal of mental deficiency},
  year={1982},
  volume={87 2},
  pages={180-5}
}
Mentally retarded children were asked to make various types of comparisons between sets and subsets of objects. Results showed that they succeeded when the comparison involved numerically unequal subsets of objects within the same set. When sets, or subsets, were numerically equal, the children clearly failed; instead of rejecting both alternatives in the… CONTINUE READING