People develop phenylketonuria only if they have two genes for this condition. Therefore we say the gene is which of the following?

Variable-ratio schedule is the least resistant to extinction.

a. true b. false

Regarding the psychodynamic therapy used today, which of the following statements is FALSE?

a. More direct questioning is used to reveal unconscious conflicts. b. Therapists today actively provoke emotional reactions, which lower defenses and provide insights. c. Today's psychodynamic therapy requires more sessions per week over a longer time period than the traditional psychoanalysis. d. Today's psychodynamic therapy has been shown to accelerate recovery.