One way to control for extraneous variables is to include _____ in your experimental study.

One way to control for extraneous variables is to include _____ in your experimental study.
 
  a) random assignmen
 b) replication
 c) multiple hypotheses
 d) subjectivity

Question 2

A student is reading a passage on the role of bipolar cells in visual perception and encounters the sentence below.
 
  Which of the following words is likely to be fixated the longest?
  In peripheral vision, tens to hundreds of rods converge on a single bipolar cell.
   a) Hundred
 b) Vision
 c) Cell
 d) In

Question 3

A research project that involves a lengthy, three-hour long assessment of the dependent variable, without any break period for the participants, may be susceptible to the effects of
 
  a) maturation
 b) nonreactive measures.
 c) selection.
 d) statistical regression.

Question 4

When a man needs to remember an errand after work, he leaves a pencil on the seat of his car, because he knows that will trigger him to recall the errand. The man's strategy capitalizes on which of the following?
 
  a) Metamemor
 b) Rehearsal
 c) Imagery
 d) Recognition