hierarchical regression output
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hierarchical regression output
 
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I am attempting to run a hierarchical regression to examine a quadratic function. I entered the predictor in step 1, clicked next, and then entered the second variable (the predictor squared) in the second step. The problem is the output
completely ignores the second step. The model summary only has Model 1. Does anyone have any idea of why this is happening? I have conducted hierarchical regressions before (although not with the quadratic function) and never had this problem before. |
Re: hierarchical regression output
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Is it possible that the squared term did not have a significant F-to-enter value? Were there any warnings or error messages? It would be extremely helpful to see the output. Even though the formatting will be
really crappy, it would be extremely helpful to post the step 2 output to the list.
Lastly, what happens if you do a forced entry regression, i.e., ‘enter x/enter xsq’? Gene Maguin From: SPSSX(r) Discussion [mailto:[hidden email]]
On Behalf Of Roberts, Alan C. I am attempting to run a hierarchical regression to examine a quadratic function. I entered the predictor in step 1, clicked next, and then entered the second variable (the predictor squared) in the second step. The problem is the output
completely ignores the second step. The model summary only has Model 1. Does anyone have any idea of why this is happening? I have conducted hierarchical regressions before (although not with the quadratic function) and never had this problem before. ===================== To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
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Re: hierarchical regression output
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Another thought – The quadratic term is typically very highly correlated with the linear term. You might need to alter(lower) the Regression TOLERANCE criterion. Tony Babinec |
Re: hierarchical regression output
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In reply to this post by Maguin, Eugene
There were no warnings or error messages. If I do a forced entry, the squared variable is listed in the “excluded variables” box (the same as when I do a hierarchical).
From: SPSSX(r) Discussion [mailto:[hidden email]]
On Behalf Of Maguin, Eugene Is it possible that the squared term did not have a significant F-to-enter value? Were there any warnings or error messages? It would be extremely helpful to see the output. Even though the formatting will be
really crappy, it would be extremely helpful to post the step 2 output to the list.
Lastly, what happens if you do a forced entry regression, i.e., ‘enter x/enter xsq’? Gene Maguin From: SPSSX(r) Discussion [[hidden email]]
On Behalf Of Roberts, Alan C. I am attempting to run a hierarchical regression to examine a quadratic function. I entered the predictor in step 1, clicked next, and then entered the second variable (the predictor squared) in the second step. The problem is the output
completely ignores the second step. The model summary only has Model 1. Does anyone have any idea of why this is happening? I have conducted hierarchical regressions before (although not with the quadratic function) and never had this problem before. ===================== To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
===================== To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
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Re: hierarchical regression output
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Alan, It is the tolerance. By default, tolerance is .0001 but your collinearity statistics reports a smaller value. You need to set TOL smaller or read up on centering the linear term before you square it. [/CRITERIA=[DEFAULTS**] [TOLERANCE({0.0001**})] Tony Babinec From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Roberts, Alan C. There were no warnings or error messages. If I do a forced entry, the squared variable is listed in the “excluded variables” box (the same as when I do a hierarchical).
From: SPSSX(r) Discussion [[hidden email]] On Behalf Of Maguin, Eugene Is it possible that the squared term did not have a significant F-to-enter value? Were there any warnings or error messages? It would be extremely helpful to see the output. Even though the formatting will be really crappy, it would be extremely helpful to post the step 2 output to the list. Lastly, what happens if you do a forced entry regression, i.e., ‘enter x/enter xsq’? Gene Maguin From: SPSSX(r) Discussion [[hidden email]] On Behalf Of Roberts, Alan C. I am attempting to run a hierarchical regression to examine a quadratic function. I entered the predictor in step 1, clicked next, and then entered the second variable (the predictor squared) in the second step. The problem is the output completely ignores the second step. The model summary only has Model 1. Does anyone have any idea of why this is happening? I have conducted hierarchical regressions before (although not with the quadratic function) and never had this problem before. ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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Re: hierarchical regression output
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Thank you! From: SPSSX(r) Discussion [mailto:[hidden email]]
On Behalf Of Anthony Babinec Alan, It is the tolerance. By default, tolerance is .0001 but your collinearity statistics reports a smaller value. You need to set TOL smaller or read up on centering the linear term before you square it. [/CRITERIA=[DEFAULTS**] [TOLERANCE({0.0001**})] Tony Babinec From: SPSSX(r) Discussion [[hidden email]]
On Behalf Of Roberts, Alan C. There were no warnings or error messages. If I do a forced entry, the squared variable is listed in the “excluded variables” box (the same as when I do a hierarchical).
From: SPSSX(r) Discussion [[hidden email]]
On Behalf Of Maguin, Eugene Is it possible that the squared term did not have a significant F-to-enter value? Were there any warnings or error messages? It would be extremely helpful to see the output. Even though the formatting will be
really crappy, it would be extremely helpful to post the step 2 output to the list.
Lastly, what happens if you do a forced entry regression, i.e., ‘enter x/enter xsq’? Gene Maguin From: SPSSX(r) Discussion [[hidden email]]
On Behalf Of Roberts, Alan C. I am attempting to run a hierarchical regression to examine a quadratic function. I entered the predictor in step 1, clicked next, and then entered the second variable (the predictor squared) in the second step. The problem is the output
completely ignores the second step. The model summary only has Model 1. Does anyone have any idea of why this is happening? I have conducted hierarchical regressions before (although not with the quadratic function) and never had this problem before. ===================== To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
===================== To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
===================== To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
===================== To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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