Suppose you want to develop a new measure for student motivation. Suggest ways in which you would develop the measure to ensure it is reliable and valid.
I have actually done this in the school I work in (I'm a School Psychologist). I developed a reward system in which students can earn points in each class for predetermined and defined behaviors. The more motivated the student is to earn points (which directly translates into academic and behavioral motivation based on the categories being rewarded) the higher the total percentage is each week. Kids that meet a threshold earn rewards that they have determined they want to work towards. We have Gold level of reinforcement which is for the kids that earn 90% of the points ...
This is a description of a reliable and valid measure I developed to track and increase student motivation.