Hi Chuck, I am not familiar with this game, but at the beginning of MaG's walkthrough she states the following:
The powers are activated by clicking the sphere at lower left corner. See the aura on the game screen. Click the item with aura and then the power icon inside the sphere to start that activity.
1. Postcognition happens when Erica touches an object to see events associated with its past. Postcognition auras are blue.
2. Projection lets Erica see a past event manifest before her eyes, but she must select three related objects first. Projection auras are green.
3. Regression lets Erica view people's memories, but must physically touch the person. Regression auras are rose-colored.
4. Synergy lets Erica connect highlighted inventory items together while cognition sphere is active to discover what past event links the items.
Take a look at #3 and #4 and see if that helps.