S = k log I

Fechner's Law
can be very confusing.

Here are a series of questions to help guide you through its interpretation.

   
Questions
1. What is 'I'?  
2. What is 'S'?  
3. What are the I-scale units?
4. What are the S-scale units?
5. What is the subjective experience represented by going from 3 to 4 on the S-scale? And by going from 7 to 8 on the S-scale?
6. What values on the I-scale correspond to S-values of 3, 4, 7, and 8?
7. What is the change in I-values represented by going from 3 to 4 on the S-scale? And by going from 7 to 8 on the S-scale?
8. What does'k' mean? Hint: 'k' indicates a mathematical "constant"
9. How is the value of 'k' discovered? Hint: Weber's Law
10. Why do we compute the log of I? Hint: What is the log of 10, 100, 1000?