You are running an experiment similar to the study by simons and chabris (1999). you ask participants to attend to a scene in which a team of basketball players are passing a ball back and forth among each other. you instruct the participants to count the number of times the ball is passed from one player to the other. you find that while participants are attending to this task, many do not notice a person in a gorilla suit that dances across the scene. this finding illustrates