A developmental psychologist interested in the relationship between eating breakfast and spelling ability conducts a survey of 213 pre-schoolers. She asks them to check yes/no on a questionnaire asking if they ate breakfast that morning. She plans on conducting an analysis of these data together with the latest spelling scores (number correct out of 10 words) of the same pre-schoolers. What names would you give the independent and dependent variables? Is (are) the dependent variable(s) discrete or continuous? What scale of measurement (nominal, ordinal, interval or ratio; and continuous or discrete) is used to measure the independent variable? What research method is being used (experimental or observational)? Explain why you conclude that the research method is one or the other.