I wanted to perform an experiment to see if the speed of students increases as the number of bears released to chase them is increased (i.e.. more bears, faster students). However, the university administration wouldn't let me use real bears, and instead I was forced to use puppies to chase the students. My experiment suffered from... insutficient or inaccurate meta data. nothing: tab emvironments are the gold standand for gathering data: a lack of ecological validity. the unstructured data problem. Question 18 Which of these database systems must be more accurate?.