Sentence:  Several investigators haye found little or no adaptation to size, and the phenonmenon of <WSD>counteradaptation</WSD> has been offered as an alternative to the explanation that adaptation to a purely visual phenomenon (such as size) occurs through a different process than does adaptation to hand-eye coordination (as adaptation to distance is often measured). 
Meaning of the word marked with <WSD> tags:  The distortion of one sensory modality that accompanies adaptation to alterations in a perceptual cues from a related modality.