-aBcontr: 2nd order contrast. Performs comparison between 2 levels of factor ‘a’ at a Fixed level of factor ‘B’

• • -aBcontr: 2nd order contrast. Performs comparison between 2 levels of factor ‘a’ at a Fixed level of factor ‘B’
  • • E.g. factor ‘a’ --> Telephone(1), Email(-1), Face-to-Face (0)
    • • factor ‘B’ --> Negative(1), Positive(2), Neutral (3)
      • We want to compare ‘Negative Telephone’ vs. ‘Negative Email’. Ignore ‘Positive’ and ‘Neutral’
      • • -aBcontr 1 -1 0 : 1 TvsE_neg
      • We want to compare “Positive Telephone’ vs. ‘Positive Email’. Ignore ‘Negative’ and ‘Neutral’
      • • -aBcontr 1 -1 0: 2 TvsE_pos
  • -Abcontr: 2nd order contrast. Performs comparison between 2 levels of factor ‘b’ at a Fixed level of factor ‘A’
  • • E.g., factor ‘A’ --> Telephone(1), Email(2), Face-to-Face (3)
    • factor ‘b’ --> Negative(1), Positive(-1), Neutral (0)
    • • We want to compare ‘Negative Telephone’ vs. ‘Positive Telephone’. Ignore ‘Email’ and ‘Face-to-Face’
      • • -Abcontr 1 : 1 -1 0 Tneg_vs_Tpos
      • We want to compare “Negative Email’ vs. ‘Positive Email’. Ignore ‘Telephone’ and ‘Face-to-Face’
      • • -Abcontr 2 : 1 -1 0 Eneg_vs_Epos