| Author | 
        PCA and BW | 
        PCA and BL | 
        PCA and HC | 
      
      
        | Babson * | 
        BW= 176 PCA – 3696,  
          SD =    2401; r = . 99 | 
        BL = 0.8 PCA    + 17.5,  
          SD =    10.8; r = . 99 | 
        HC= 0.48 PCA + 14,  
          SD = 6.63; r =. 98 | 
      
      
        | Battisti * | 
         =174 APC    – 3665,  
          SD = 434; r = .99 | 
         = 0.9    APC + 11.5,  
          SD = 4; r= . 99 | 
         = 0.6    APC + 9.72, 
          SD = 2.4 ; r= . 98 | 
      
      
        | Dombrowski * | 
         = 174 APC    – 3732,  
          SD = 1262; r=.99 | 
         = 1.06 APC    + 6.64,  
          SD = 7.8; r=. 99 | 
         = 0.721    APC + 5.3,  
          SD = 5.3; r = . 98 | 
      
      
        | Gairdner * | 
         = 206 APC    – 5051,  
          SD = 2672; r = . 98 | 
         = 0.89 APC    +13.6,  
          SD = 13; r =. 99 | 
         = 0.5 APC    + 13.94,  
          SD = 6.5; r = . 98 | 
      
      
        | Lubchenco * | 
         = 163 APC – 3375,  
          SD = 1303; r =. 99 | 
         = 1.25 APC    + 2.5,  
          SD = 7.1; r =. 99 | 
         = 0.58 APC    + 10.5,  
          DS = 4.8; r =. 97 | 
      
      
        | Usher-McLean * | 
         = 177 APC    – 3741,  
          SD = 1350; r =. 99 | 
        T= 1.11 APC +7,  
          SD = 8.35; r =. 99 | 
         = 0.81 APC    + 3.1,  
          SD = 6.2; r=.99 |