What is the empirical evidence for "A Pilot Study: Evaluating the Effects of Defusion on Choice Making Under Negative and Positive Reinforcement Contingencies" by Amanda N. Chastain, Jonathan Tarbox, Elizabeth Meshes, and Yiyi Wang?
a) Positive reinforcement leads to better decision making under defusion
b) Negative reinforcement leads to better decision making under defusion
c) Both positive and negative reinforcement have no significant effect on decision making under defusion
d) The study did not provide conclusive evidence regarding the effects of defusion on decision making under reinforcement contingencies