21. Projection may help a fragile dissociation , as in dissociative identity disorder. 22. The most practical dissociation method is probably an electrical discharge. 23. Thermal dissociation of ammonia yields an inexpensive mixture of hydrogen and nitrogen. 24. AChRs therefore exhibit a sigmoidal dissociation curve due to this cooperative binding. 25. This is when the forgetting hypothesis was replaced by the dissociation hypothesis. 26. These examples suggest a double dissociation between the intentional and phenomenal stances. 27. A common way to demonstrate modularity is to find a double dissociation . 28. This can be measured numerically by using the dissociation constant K D. 29. The " gold standard " for cognitive neuropsychology is the double dissociation . 30. The enthalpy change of atomization of gaseous bond dissociation enthalpies.