Standardized Coefficients for Structural Equation Models

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Description

These functions calculate standardized regression coefficients for structural equation models. The function std.coef is simply an abbreviation for standardized.coefficients.

Usage

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standardized.coefficients(object, digits = 5, oneheaded=TRUE, twoheaded=TRUE)

std.coef(...)

Arguments

object

an object of class sem returned by the sem function.

digits

number of digits for printed output.

oneheaded

standardize path coefficients? Default is TRUE.

twoheaded

standardize variances and covariances? Default is TRUE.

...

arguments to pass to standardized.coefficients.

Value

Returns a data frame with the standardized coefficients, labelled both by parameter names and by arrows in the path diagram for the model.

Author(s)

John Fox jfox@mcmaster.ca and Adam Kramer

References

Bollen, K. A. (1989) Structural Equations With Latent Variables. Wiley.

See Also

sem

Examples

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# ------------- assumes that Duncan, Haller and Portes peer-influences model
# -------------     has been fit and is in sem.dhp.1     
	## Not run: 
standardized.coefficients(sem.dhp.1) 

##           Std. Estimate                     
          Std. Estimate                     
## 1  gam11   0.210278     RGenAsp <--- RParAsp
## 2  gam12   0.325612     RGenAsp <--- RIQ    
## 3  gam13   0.284855     RGenAsp <--- RSES   
## 4  gam14   0.093702     RGenAsp <--- FSES   
## 5  gam23   0.074576     FGenAsp <--- RSES   
## 6  gam24   0.275763     FGenAsp <--- FSES   
## 7  gam25   0.420558     FGenAsp <--- FIQ    
## 8  gam26   0.192224     FGenAsp <--- FParAsp
## 9  beta12  0.199418     RGenAsp <--- FGenAsp
## 10 beta21  0.217521     FGenAsp <--- RGenAsp
## 11         0.766717     ROccAsp <--- RGenAsp
## 12 lam21   0.814771     REdAsp <--- RGenAsp 
## 13         0.829943     FOccAsp <--- FGenAsp
## 14 lam42   0.771619     FEdAsp <--- FGenAsp 
## 15 ps11    0.477987     RGenAsp <--> RGenAsp
## 16 ps22    0.383036     FGenAsp <--> FGenAsp
## 17 ps12   -0.035518     FGenAsp <--> RGenAsp
## 18 theta1  0.412144     ROccAsp <--> ROccAsp
## 19 theta2  0.336148     REdAsp <--> REdAsp  
## 20 theta3  0.311194     FOccAsp <--> FOccAsp
## 21 theta4  0.404603     FEdAsp <--> FEdAsp  
## 22         1.000000     RParAsp <--> RParAsp
## 23         0.183900     RIQ <--> RParAsp    
## 24         1.000000     RIQ <--> RIQ        
## 25         0.048900     RSES <--> RParAsp   
## 26         0.222000     RSES <--> RIQ       
## 27         1.000000     RSES <--> RSES      
## 28         0.018600     FSES <--> RParAsp   
## 29         0.186100     FSES <--> RIQ       
## 30         0.270700     FSES <--> RSES      
## 31         1.000000     FSES <--> FSES      
## 32         0.078200     FIQ <--> RParAsp    
## 33         0.335500     FIQ <--> RIQ        
## 34         0.230200     FIQ <--> RSES       
## 35         0.295000     FIQ <--> FSES       
## 36         1.000000     FIQ <--> FIQ        
## 37         0.114700     FParAsp <--> RParAsp
## 38         0.102100     FParAsp <--> RIQ    
## 39         0.093100     FParAsp <--> RSES   
## 40        -0.043800     FParAsp <--> FSES   
## 41         0.208700     FParAsp <--> FIQ    
## 42         1.000000     FParAsp <--> FParAsp
    
## End(Not run)