According to Research Presented in the Text, Students Shot a Roll

Multiple Choice

According to research presented in the text, students shot a roll of film and printed two photographs. Some were told that they could exchange the one they chose to keep within five days, but others were told that their choice was final. What was the independent variable of this experiment?

A) Condition: choice or no choice
B) Condition: photograph 1 or photograph 2
C) How much they liked the photos
D) The five-day exchange period