Say you had a student in the class who temporarily can't see. She is trying to become independent of others and asks students to help measure the distance between such places as the desks, the board, and the student lounge. (The online equivalent would be where to find the forums, lessons, and the chat room.) To help this student out, four or five students independently count the steps to the destination (or summarize the distance in fingers on the screen). If you were to compare the results, how would the responses illustrate the definition of measurement presented in the first session?Was this a valid and/or reliable measurement procedure? Would the student be able to find the destination? How can a test be reliable and not valid, and not valid unless it is reliable?