For example, in one water, sanitation, and hygiene programme in Indonesia, flow sensors were combined with motion detectors to measure the impact of behavior change training, with the aim of increasing hygienic actions (i.e., washing hands after latrine use). The study found community participants were washing hands after latrine usage, but that the survey responses (those who indicated they wash their hands after using the latrine) were significantly higher than the data captured by the motion sensors, suggesting that over-reporting had occurred in the verbal and self-reported surveys. Growth in agricultural productivity over the last fifty years has been much slower in developing regions of the world, in part due to large capital costs.