parkway s math common assessments l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Parkway’s Math Common Assessments PowerPoint Presentation
Download Presentation
Parkway’s Math Common Assessments

Loading in 2 Seconds...

play fullscreen
1 / 13

Parkway’s Math Common Assessments - PowerPoint PPT Presentation


  • 111 Views
  • Uploaded on

Parkway’s Math Common Assessments. A brief study of their validity and ability to predict MAP scores. Reliability versus Validity. Reliability measures consistency. Does a test consistently give us the same result time after time? Validity measures accuracy.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Parkway’s Math Common Assessments' - hazina


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
parkway s math common assessments

Parkway’s Math Common Assessments

A brief study of their validity and ability to predict MAP scores

reliability versus validity
Reliability versus Validity
  • Reliability measures consistency.
    • Does a test consistently give us the same result time after time?
  • Validity measures accuracy.
    • Does a test measure what it is supposed to be measuring?
target practice
Target Practice

http://www.socialresearchmethods.net/kb/relandval.php

how do we determine validity
How do we determine validity?
  • Validity can be determined by running correlations.
  • The most common is Pearson’s Product-Moment Correlation Coefficient (r).
  • In this case, we compare student common assessment scores to MAP test scores.
pearson s coefficient r
Pearson’s Coefficient (r)
  • A value between -1 and 1.
  • -1 is a perfect negative correlation.
  • 1 is a perfect positive correlation.
  • 0 is no correlation.
  • -0.8 is a strong negative correlation.
  • 0.8 is a strong positive correlation.

Correlations measure the relationship between two variables. They do not measure causation.

quick way to determine what a specific coefficient means
Quick way to determine what a specific coefficient means

Size of coefficientGeneral Interpretation

  • .8 to 1.0 Very strong relationship
  • .6 to .8 Strong relationship
  • .4 to .6 Moderate relationship
  • .2 to .4 Weak relationship
  • 0 to .2 Weak or no relationship

Salkind (2005) – cited in report

correlation coefficients
Correlation Coefficients

http://mste.illinois.edu/courses/ci330ms/youtsey/scatterinfo.html

pearson coefficients of correlations r for corresponding 2009 common assessments and map math tests
Pearson Coefficients of Correlations (r) forCorresponding 2009 Common Assessments and MAP Math Tests
so what could we do about it
So what could we do about it?
  • Perform an item by item validity analysis by calculating correlations between common assessment items and MAP test items .
  • Obviously, the common assessment items and the MAP items we compared would have to be testing the same concept.
  • Then delete the poorly correlated items and replace them with new items.
  • Check how the new items correlate the following year.
predicting map scores using multiple regression
Predicting MAP scores using multiple regression
  • It is very common to use accepted data to offer a prediction of the future. The opportunity of using existing data to predict future outcomes is viewed as model-building. That is to say, existing data are used to build a model of the future, with a predetermined degree of error built into the model. Multiple regression is a common and useful tool for model building. (Thomas W. MacFarland, 1998)

http://www.nyx.net/~tmacfarl/STAT_TUT/reg_sion.ssi

common assessment percentages and corresponding predicted achievement level on the map math test
Common Assessment Percentages and Corresponding Predicted Achievement LevelOn the MAP Math Test
or you can use these equations for individual students
Or, you can use these equations for individual students. . .

5th Grade:

6th Grade:

7th Grade:

8th Grade: