Are there any mechanisms in place to stop students from cheating on LearningCurve activities?
Yes. First, questions are delivered to each student in a different, random order. Second, answers for multiple choice questions are scrambled (except in rare cases where the question dictates that choices are shown in a certain set order). Third, one relatively sophisticated way a student might try to cheat is to quickly click the first, then the second, then the third choice for each multiple choice question, until she gets the question correct. Although s/he won't receive many points for every question, s/he will receive some points, and s/he will eventually reach the target score. To prevent this behavior, students are penalized if they answer the questions too quickly; the potential total points available for questions is reduced by a factor of 30% (i.e. if the next question would normally be worth 20 points, it will only be worth 14 points after this penalty has been applied). Subsequent quick, incorrect responses increase the penalty for later questions; correct and/or slower responses reduce the penalty.