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Table 1 Correlation matrix among the main variables for the whole N/Nih-HS rat sample.

From: Effects of environmental and physiological covariates on sex differences in unconditioned and conditioned anxiety and fear in a large sample of genetically heterogeneous (N/Nih-HS) rats

  ZM-E ZM-T ZM-SAP ZM-DEF ZM-BW NACT-DIST5 NACT-DIST30 FREEZ SHAV SHAV-LAT ITC SHAV-ITC
ZM-E 1            
ZM-T .85** 1           
ZM-SAP .44** .41** 1          
ZM-DEF -.15** -.16** -.12** 1         
ZM-BW -.21** -.15** -.04 .22** 1        
NACT-DIST5 .14** .17** .18** -.14** -.15** 1       
NACT-DIST30 -.01 .03 .02 -.04 -.05 .49** 1      
FREEZ -.09** -.05 -.07* .01 .23** -.09** -.01 1     
SHAV .05 0.5 .10** .02 -.04 .06* .03 -.31** 1    
SHAV-LAT -.14** -.13** -.12** .06* .37** -.11** -.04 .36** -.47** 1   
ITC .11** .12** .11** -.04 -.17** .14** .05 -.34** .71** -.50** 1  
SHAV-ITC .10** .11** .12** -.03 -.14** .13** .05 -.35** .82** -.52** .98** 1
  1. Correlation matrix among the main variables for the whole N/Nih-HS rat sample. Correlations with p ≤.01 and p ≤.001 are shown in bold letters. ZM-E, open section entries (n); ZM-T, time spent (s) in the open sections; ZM-DEF, number of defecation boluses; ZM-SAP, stretched attend postures (n); ZM-BW, body weight right before the ZM test (g); NACT-DIST5, NACT-DIST30 distance (cm) travelled during the first 5 minutes and during the last 5 minutes, respectively, in the "automated novel-cage activity" test; SHAV, avoidances (n) in the shuttlebox; SHAV-LAT, mean response latency (s) in the shuttlebox task; ITC, intertrial crossings (n) in the shuttlebox task; SHAV-ITC avoidances plus intertrial crossings (n) in the shuttlebox task. N = 1456 N/Nih-HS rats of both sexes (see "Materials and Methods"). * p ≤ .01, **p ≤ .001, Pearson's correlation coefficient.