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Table 3 Factor loading matrix (n = 498)*.

From: Neurobehavioral effects of transportation noise in primary schoolchildren: a cross-sectional study

Test battery Item Factor I Factor II Factor III Factor IV
NES SRTT 0.743    
  Block_RT 0.764    
  Arrow_RT 0.769    
  Switch_RT 0.618    
  Block_f    0.631  
  Arrow_f    0.757  
  Switch_f    0.632  
  SDST    0.369  
  DMST_f     0.492
  HECT 0.538    
PP Conceptual recall   0.922   
  Information recall   0.918   
  Recognition   0.675   
  CRIE   0.458   
  Working memory     0.682
  Sustained attention     0.608
  Prospective memory     0.469
Factor Interpretation Variance explained Alpha**
I Response speed and locomotion 20.3 0.76
II Episodic memory and reading comprehension 15.1 0.77
III Ability to switch and perceptual coding 10.8 0.58
IV Memory and attention 6.5 0.42
Total     52.7  
  1. * Per item only the highest loadings were presented; ** Cronbach's alpha (standardized), based on the items given in the factor loading matrix; this is a function of the item-inter-correlation and of the number of items included in the scale. Abbreviations: NES = Neurobehavioral Evaluation System; PP = Paper- and-pencil test.