Imagine a study where participants were given Jell-O shots to ...

[charchew]

Imagine a study where participants were given Jell-O shots to consume before participating in experiments where reaction time was measured. However, to the participants' surprise, the Jell-O shots were not made with alcohol.
 
  When the participants were debriefed and told that the Jell-O contained no alcohol, some participants refused to drive home until they had sobered up. The participants' responses indicate that __________ was a threat to internal validity.
 
  a. diffusion of treatments
  b. instrumentation
  c. placebo effect
  d. demand characteristics

Question 2

When your professor keeps track of your daily attendance in class, it is a type of physiological measure.
 
  Indicate whether the statement is true or false

[snackralk]

Answer to Question 1

C

Answer to Question 2

F

[charchew]

Gracias!

[softEldritch]

Excellent