ASSESSMENT CRITERIA EDUCATION Instructor Course Introduction to Statistics

ASSESSMENT CRITERIA EDUCATION Instructor Course

Introduction to Statistics describing inferences about the world from a sample of data Descriptive Statistics are numerical estimates Inferential Statistics process of inferring from a sample to the population

Descriptive Statistics Basic features of data in a study. Simple summaries about the sample and measures. With simple graphics analysis, they form the basis of virtually every quantitative analysis of data.

Reliability and Validity Reliability Validity Definition Consistency of results on repeat measures Measuring what is supposed to be measured Types Inter-rater Face Validity Intra-rater Construct Validity Split half Predictive Validity Test-retest

Validity To be valid you must have a reliable measure BUT… You can have an invalid measure that is reliable. Validity is the strength of our conclusions, inferences or propositions

Reliability is the consistency of your measurement. There are two ways that reliability is usually estimated: test/retest and internal consistency.

Norm- and Criterion-Referenced Testing Tests can be categorized into two major groups. These two tests differ in their intended purposes.

Norm Referenced Measure - Student Assessment Most appropriate when one wishes to make comparisons across large numbers of students Norm-referenced measures are designed to compare students.

Criterion referenced measures Student Assessment Criterion-referenced assessments help to eliminate competition determine individual performance items based on standards given to students discrimination is irrelevant and should not take place

Conclusion Statistics allow us to quantify things Provides Accuracy in representing data Helps to describe basic features of data in a study Use Mathematics for interpretation of data

References http: //www. edtech. vt. edu/edtech/id/assess/purposes. html Bond, Linda A. (1996). Norm- and criterion-referenced testing. Practical Assessment, Research & Evaluation, 5(2). Retrieved July 1, 2010 from http: //PAREonline. net/getvn. asp? v=5&n=2. This paper has been viewed 150, 472 times since 11/13/1999. Anastasi, A. (1988). Psychological Testing. New York, New York: Mac. Millan Publishing Company. Corbett, H. D. & Wilson, B. L. (1991). Testing, Reform and Rebellion. Norwood, New Jersey: Ablex Publishing Company. Stenmark, J. K (ed; 1991). Mathematics Assessment: Myths, Models, Good Questions, and Practical Suggestions. Edited by. Reston, Virginia: The National Council of Teachers of Mathematics (NCTM) Stiggins, R. J. (1994). Student-Centered Classroom Assessment. New York: Merrill http: //www. socialresearchmethods. net/tutorial/Colosi/lcolosi 2. htm