K1 Classification Image Method
	K11 Detection
	K12 Vernier Acuity
	K13 Methodology
	K14 Auditory
K2 Image Discrimination Models
	K21 Simplified Models
	K22 Spatial-Temporal Models
	K23 Color Models
	K24 Vision Standards
	K25 Image Quality Metrics
	K26 Symbol Discriminability Metrics
K3 Text Legibility Metrics
	K31 Letter Identification
K4 Perceptual Learning
	K41 Template Learning
	K42 Spatial Calibration
	K43 Color Dimensions
K5 Context effects
	K51 Position Discrimination
K6 Signal Detection in Noise
	K61 Medical Imaging
	K62 Response Bias
K7 Image Processing
	K71 DCT Restoration
	K72 Random Sampling
K8 Neurophysiology
	K81 CAT Scans
	K82 Frontal Lobe Lesions
K9 Statistical Methods
	K91 Factor Analysis