Hessian matrix error in SPSS – calculate ICC scores

[Mar]

Dear all,

Who can help me out?

 

I try to calculate ICC scores at the individual level of my data to test the appropiateness of conducting my analyses at the team level.

 

While calculating the intercept estimate and the residual estimate I received the following error in PASW 17.

“The Final Hessian matrix is not positive definite although all convergence criteria are satisfied. The MIXED procedure continues despite the warning. Validity of subsequent cannot be ascertained.”

Led to intercept of .0000000a with the following error:

This covariance parameter is redundant. The test statistic and confidence interval cannot be computed.

In need to have the correct intercept en residual to make the calculation.. I really need help, I have been trying to figure this out for the last couple of days.

 

My syntax is:

DATASET ACTIVATE DataSet1.
MIXED KW_COM_TEAM
/PRINT = SOLUTION TESTCOV
/METHOD = ML
/FIXED = INTERCEPT
/RANDOM = INTERCEPT | SUBJECT(KANTOOR)

 

Can I change something to my dataset to make sure the error is fixed?

Thanks in advance for your help!

Best regards, Mar

 

[Author]

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