Ellen's parents noticed that even as a young infant she was alert, active and engaged in her environment. The characteristics they noticed could be related to Ellen's ______

People like to find in others a match that reaffirms their own way of looking at the world. This is referred to as ____

a. commonality b. consensual validation c. re-invention d. recalibrating

Individuals with Prader-Willi syndrome may have some defect in their ___ system

a. vagus nerve b. ghrelin c. cholecystokinin d. none of the above