Piaget proposed that the active construction of reality takes place through the use of schemes. schemes are:

Assimilation and accommodation are the two progressions involved in the use of schemes.  Assimilation occurs when new info is altered to fit a remaining scheme while accommodation involves changing the scheme to adapt to the new information. Schemes Piaget proposed that the active construction of reality takes place through the use of schemes. 

answer; dead end or culdesac;

answer; group think;