EDUR 8132
Educational Statistics II

Notes 8c: Squared Semi-partial Correlation (or delta-R-squared ΔR²)

Presentation

• Document: Squared Semi-partial Correlation (ΔR²) PDF
• Table of Critical F-ratios: Critical F at .05 and .01
• Videos:
  • Notes used in video: ΔR² Notes (PDF)
  • Data used in video: SPSS (and JASP) data file
  • Watch first: Squared Semi-partial Correlation (ΔR²) - provides video logic of ΔR² and illustrated how to obtain it through regression (11 minutes)
  • SPSS: Faster method for obtaining ΔR² values and tests in SPSS (8 minutes)
    • SPSS syntax offers an easier way to obtain several ΔR² values and F ratios simultaenously; change Method = enter x1 x2 x3 x4 to Method = test (x1) (x2) (x3) (x4). For the video data above, this command change produces the desire results: "/Method = ENTER Study_Time IQ Griffin Moore" to this "?Method = Test (Study_Time) (IQ) (Griffin Moore)"
  • JASP: Obtaining ΔR² values and tests in JASP (8 minutes)