Cassie's mother suffered a stroke. since then, she sometimes says strange things, such as, "i need to go to the store to buy some canaries," when she means to say that she needs groceries. cassie's mother seems to be suffering from

I believe the answer is: Wernicke's aphasia

Wernicke's aphasia refers to a form of illness that make the victim unable to properly decipher both writing and verbal lanugage. This abnormalities occurs when we somehow damage our brain in the broca's area, which took part in the left hemisphere of the brain.

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

intimacy, passion and commitment are the components of a interpersonal relationship emphasized in the triangular theory of love by robert sternberg.

the triangular theory of love says love can be comprehend as this componest form the vertices of a triangle.  

intimacy relates to feelings such as of closeness and connection;

passion relates the drives that brings people together, as physical attraction.

commitment relates to the being in a long-term relationship.