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Elaboration Paradigms Multivariate Tables - PowerPoint PPT Presentation

Elaboration Paradigms Multivariate Tables. Interpreting what happens to the 2-Way table when introduce test variable. Elaboration. Trying to specify what happens to the relationship between IV and DV when introduce T. Possible outcomes: No change in partial tables Change in partial tables.

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Interpreting what happens to the 2-Way table when introduce test variable

Elaboration
• Trying to specify what happens to the relationship between IV and DV when introduce T.
• Possible outcomes:
• No change in partial tables
• Change in partial tables.
Factors to Consider in an Elaboration
• Is the test variable an antecedent or an intervening variable?
• Antecedent – precedes IV
• Intervening – occurs in between Iv and DV
• What happens to the original relationship between IV and DV when T is introduced?
• Stay the same replication
• Change  need to consider a variety of possible types of elaboration: spuriousness, specification, distorter or suppressor
Spuriousness
• If relationship between IV and DV is weakened when T present then have spuriousness. (Qxy0 and Qtxy=0 pr negligible)
• If T is an antecedent then have explanation. T explains relationship between IV and DV.
• If T is an intervening then have interpretation.
• Relationship between variables that produce spuriousness
• QTX and QTY must be nonneglible
• If Qxy =+, then QTX and QTY must have same signs
• If Qxy =-, then QTX and QTY must have opposite signs
Specification
• The introduction of T results in different relationships between IV and DV for conditions of T.
• Can say that T specifies the relationship between IV and DV or that relationship between IV and DV depends on the level of T. Look for which attribute of T strengthens original relationship.
• Before conclude that you have specification the difference for the partial Q’s > 10 points. See if the chi square for the partial is significant.
Suppression
• Suppressor is present
• The relationship between IV and DV is small or negligible. The introduction of the test variable results in swelling the relationship between IV and DV
• When T raises a positive relationship between Qxy, then T must have opposite sign correlations with X and Y.
• When T raises a negative relationship between Qxy, then T must have same sign correlations with X and Y.
Distortion
• Distortion is present
• The relationship between IV and DV is reversed when T is introduced.
• When T reverses the sign of the relationship between Qxy, then T must have opposite sign correlations with X and Y.
• When T results in reversing a negative relationship between Qxy, then T must have opposite sign correlations with X and Y.
• When T results in reversing a positive relationship between Qxy, then T must have same sign correlations with X and Y.