Discuss each of the different type of validity as it applies to a measurement instrument such as the Perceived Stress Scale (http://www.psy.cmu.edu/~scohen/PSS.html). Discuss the face validity and the construct validity of this measure.
week 3
Week 3 class 561 300-400 words discussion CIT in Action Officer Williams is dispatched to a call about a 28-year-old man, Jason, behaving erratically in a local park. Witnesses report that Jason is yelling incoherently, pacing back and forth, and swinging a metal rod. Upon arrival, Officer Williams observes Jason