The first hominins are thought to have evolved about

One disadvantage of using extinction as a means of behavior change is that

a. it is ineffective compared to other behavior change methods. b. it frequently endangers the client. c. the therapist may not be able to control the sources of reinforcement operating in the client's life. d. it can interfere with the therapist developing genuine insight into the client's striving for self-actualization. e. it may create an adversarial relationship between the client and therapist.

Which of the following procedures is NOT commonly utilized to detect genetic diseases during pregnancy?

A) ultrasonography B) amniocentesis C) positron emission tomography D) chorionic villus sampling