Exam 6: Selecting Measurement Instruments

The University uses an algebra test to screen students into statistics courses. Students' responses are scored as correct or incorrect and are summed for a total score. The test is really long and seems to cover a lot of content. So Carlos divides the test in two and assesses the reliability of the entire test and the reliability of the two halves. Carlos is assessing the ________________ of the test.

The district is considering changing the achievement tests that they administer. A new alternative test is much shorter and if valid to measure student achievement could save substantial instructional time. This year the school will administer both tests and assess the ____________ validity.

A local government group recently conducted a survey to ask those living in the community if they would like to see a new pool facility built. The survey asked the following six questions: 1. Do you live in the community defined by zip codes 16801,16802, 16803 or 16804? Y_______ N_______ 2. Do you currently own a membership to any community or private swimming pools? Y_______ N_______ 3. How many people live at your residence. 1_______ 2_________ 3-6_________ 6+___________ 4. Please indicate the combined annual income of the members of your residence in thousands of dollars. $__________________ Given the following scale answer questions 5 and 6. 1=Strongly Disagree, 2=Disagree, 3 =Neutral, 4=Agree, 5=Strongly Agree 5. Our community should build a new indoor pool facility. 1 2 3 4 5 6. I support spending tax dollars for recreational opportunities. 1 2 3 4 5 -Given the above survey, Item 1 data would represent ________ level data.

An instrument that measures mathematics knowledge, reading comprehension, and computation skills provides four measures, one score for each scale and an overall score. Which of the following is likely regarding the properties of the scores?

A recent study reported about a new instrument that measures students' motivation for challenging academic tasks. In the study the instrument had been given to a number of children at the beginning of their academic year. After reading the study, Susan wondered if students' responses would be different at the end of the academic year. She decides to conduct a study that administers the instrument several times over the course of an academic year and measures the correlation across administrations. Susan has addressed a concern with which of the following types of reliability?