Relier Pairs Concrete Operational StageVersion en ligne This crossword puzzle is over key terminology related to Piaget's concrete operational stage. par Jennifer Paris 1 decentration 2 conservation 3 reversibility 4 classification 5 seriation 6 identity considering changes in more than one dimension arranging items along a quantitative dimension in a methodical way understanding that things that have been changed can be returned to their original state understanding that changes in one quality can be compensated for by changes in another quality understanding that objects have qualities that do not change even if the object is altered in some way. organizing objects by a variety of characteristics (size, color, shape, etc.)