These type definitions are based on Jung typology with additional input from members of PsychologyTribe.com

The first definition is for the ISTJ and can be found at www.istjtribe.com
The second definition is for the ISFJ and can be found at www.isfjtribe.com

Other type definitions will be added with member input.

Also, I'll place theories that relate to Neuro Psychology on the following web page www.neuropsychologylab.com