COMMDIS416 1st Edition Lecture 7Outline of Last Lecture I. Psychometric Test Properties II. Standardization Process III. Six Recommended Criteria IV. Bell Curve Theory V. Types of Scores VI. In Summary VII. PPVT-4 Results VIII. Consider the Following Scores Outline of Current Lecture I. Bell Curve Theory Revisited-Score Interpretation PracticeII. GFTA Response Form III. Score Interpretation Process IV. Julia’s Sound Production ErrorsV. Testing Considerations Current LectureI. Bell Curve Theory Revisited-Score Interpretation Practice - Goldman Fristoe Test of Articulation (GFTA)- Julia, 2 years 5 months - During the video (15 min):o 2 levels for recording responses: Level 1: Presence of error - If sound produced correctly, leave cell BLANK of use check mark - If sound produced in error, put an “X” in the cell *Level 2: Presence and type of erroro E.g., Write IPA symbol for substituted sound II. GFTA Response Form - Letters with numbers above it are “Target Sounds” - Watch your notation carefully (you may cross letter out and write substitution above it) - If they do not produce the target word, do not count it III. Score Interpretation Process - After the video:o Compute raw score (total number of articulation errors): Count number of negatives in far right columno Raw score between 0 and 77 o Convert raw score to standard score and percentile rank using GFTA’s normative table o Make sure to use appropriate gender column  Count up the negatives = 17  Raw score = 17 (in female column)- Standard Score = 114 - 90% Confidence Level=109-119- 95% Confidence Level = 108-120 - Percentile=86VI. Julia’s Sound Production Errors - /l /- /r/ - /tʃ/ “ch”- /θ/ “th”- /ð/ “th”- Consonant blends: /bl, br, dr, gl, tr/VII. Testing Considerations - Testing strategieso What cues/prompts did the clinician use?o Did cues/prompts were most helpful for Julia?o Environment - Critical Analysis of Assessmento Failed to administer 1 test item (“knife”)o Reinforced incorrect production of “tree” (/kri/)o Accepted distorted productions for two items (“orange” and “quack”)o Didn’t produce target word (“swim” vs. target “swimming”)o Missed item