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 classification 3 reversibility 4 seriation 5 conservation 6 identity organizing objects by a variety of characteristics (size, color, shape, etc.) understanding that objects have qualities that do not change even if the object is altered in some way. considering changes in more than one dimension understanding that changes in one quality can be compensated for by changes in another quality understanding that things that have been changed can be returned to their original state arranging items along a quantitative dimension in a methodical way