What is the mental disorder characterized by disordered thinking, perceptions, and delusions?

Proactive interference of long-term memory means ___________

a. new material interferes with memory of old material b. new material has suppressed short-term memories c. old material interferes with memory of new material d. old material has eliminated memories of new material

Mark's parents bring him to see a psychologist because they believe Mark is experiencing delusions. What piece of information would most indicate that Mark had schizophrenia and not some other diagnosis?

a) His delusions only come when his parents are around. b) His delusions are highly implausible. c) His delusions have persisted for more than 5 years. d) His delusions involve other people.