Conducting a psychological experiment on the effects of gratitude

Procedure

The participants were given the Marlow-Crowne survey to account for social desirability.

3 conditions - experiential, possessions, and daily habits (control condition)

participants are randomly assigned to three conditions. between-subjects design.

experiential and possession conditions - asked to write about a purchase over $100 and attach any emotions they had to that purchase. After they write, they are asked to rate the amount of gratitude they felt on a scale of 1 to 10

The control condition is asked to rate their gratitude after completing daily activities. same scale.

What are the IV and DV of this experiment?