Whether or not a behavior is considered abnormal depends on

A correlation is considered to be positive if:

both variables increase or decrease together. one variable increases while the other variable decreases. no connection between the two variables is seen. there is no instance of a positive correlation.

Which of the following is FALSE regarding the research on posttraumatic stress disorder?

a) PTSD can cause cognitive problems. b) Posttraumatic stress disorder can be triggered by an anniversary of the traumatic event. c) Suicidal thoughts and behavior are sometimes associated with a diagnosis of posttraumatic stress disorder. d) Those with a delayed onset of posttraumatic stress disorder are likely feigning the disorder for attention and time off of work.