A STUDY OF RANGE EFFECTS FOR THE BORG CR100 (CENTIMAX) SCALEÂ® AND MAGNITUDE ESTIMATION IN LOUDNESS
To compare range effects in loudness scaled with magnitude estimation (ME) and the Borg CR100 (centiMax) ScaleÂ®, a classroom experiment with a total of 53 subjects (27+26) was conducted. Two conditions with a wide and a narrow stimulus range were used (Group A: ME-narrow; ME-wide; CR-wide; CR-narrow; and Group B: ME-wide; ME-narrow; CR- narrow; CR-wide). Average exponents obtained were: nME-narrow = 0.69; nME-wide = 0.47; nCR- narrow = 0.48; nCR-wide = 0.43 for group A; and: nME-narrow = 0.70; nME-wide = 0.49; nCR-narrow = 0.66 ; nCR-wide = 0.46, for group B. For ME, the range effect was significant for both groups, but for CR100 a significant range effect was only obtained for group B. These results suggest that the CR100 is less sensitive than ME to context effects related to stimulus range.