In an experiment, researcher Monica Gagliano wanted to study if "Mimosa" plants in low light conditions would have a greater potential for learning than those grown in high light, since the low light plants were already in low energy environments and folding their leaves would be more energetically costly to the plant. The simplest form of learning is the ability of an organism to have a certain level of sensitivity to the environment that allows the organism to respond to potentially harmful stimuli as well as the capability to learn and filter out irrelevant stimuli (habituation) or increase the response due to a learned stimulus (sensitization).