1. Continuous Response Digital Interface

2. What is it??? Continuous Response Digital Interface a.k.a. CRDI
Developed at the Florida State University Center for Music Research in 1989
Used to measure ongoing and changing musical responses while people are listening to music
A dial or a slide that can be manipulated by the listener
Used Music Therapy and Education Research
(Wheeler, 1995)

3. Software Potentiometer Attached to a dial with a pointer
Connected to a computer by 16-bit analog-to-digital interface
Can receive input from a max of 4 dials
(Gregory, 1995)

5. What does it do?
Interface receives information from dial that is manipulated by listener
Saves the information
Sends information to computer that reads it as a graph
256 degrees on dial
Can be used in two types of applications
(Gregory,1995)

7. Continuum
-Movement of the pointer indicates a change in the response of the listener -Boundaries are pre-determined by researcher -examples of boundaries; less-more, negative-positive -256 degrees or positions -Degrees are sampled continuously -Samples are plotted -Means and standard deviations (Gregory, 1995)

8. Category Degrees of dial divided into predetermined sections
Each section represents a separate category
Movement of dial indicates category selection
Using overlays makes it simple for subjects
Similar to multiple choice question (Gregory, 1995)

9. Reliability Input stability a concern Study done by R.V. Britten
3 Levels of subject
Rated preference and complexity of piece
Participants using dial rated higher than pencil and paper
Another study tracked perceived intensity
CRDI scores were reliable but significantly different than static responses (Madsen, 1999)

10. References
DeNardo, G. F., & Kantorski, V. J. (1998). A comparison of listeners' musical cognition using a continuous response assessment. Journal of Research in Music Education, 46(2),
Gregory, D. (1995). The continuous response digital interface: An analysis of reliability measures. Psychomusicology, 14,
Madsen, C. K., & Geringer, J. M. (1999). Comparison of good versus bad tone quality/intonation of vocal and string performances: Issues concerning measurement and reliability of the continuous response digital interface. Bulletin of the Council for Research in Music Education, (141),
Wheeler, B. L. (Ed.). (1995). Music therapy research: Quantitative and qualitative perspectives Barcelona Publishers.