The __________-stress hypothesis suggests that people are genetically predisposed to a particular mental disorder, but will develop the disorder only if exposed to the environmental or emotional stress during critical developmental periods

Morgan's mother leaves the room, and when she returns,

Morgan runs up to her but then kicks and squirms to get away from her mother. According to Mary Ainsworth's research, Morgan is exhibiting an insecure­ attachment. fill in the blank with correct word

Correlations are important in

a. calculating z-scores. b. making predictions. c. proving causality. d. setting up frequency distributions.