FMrate: Discrimination Judgments of Frequency-Modulated Tones
In qdm: Fitting a Quadrilateral Dissimilarity Model to Same-Different Judgments

Description Usage Format Source Examples

Three subjects were repeatedly presented with all possible pairs of nine frequency-modulated (FM) tones. The tones had one out of nine different modulation rates, a random modulation phase, a duration of 500 ms, a sound pressure level of 60 dB, and a center frequency of 1000 Hz.

On each trial, subjects judged whether the two FM tones sounded same or different.

1	data(FMrate)

A data frame of eight variables and 26,820 observations:

resp: the response of a subject in each trial, either s for same or d for different.
RT: reaction time from stimulus onset until reaction of subject.
id: subject id.
ses: number of experimental session.
s1: stimulus (FM rate in Hz) which was presented in the first observation area; in this case: first.
s2: stimulus (FM rate in Hz) which was presented in the second observation area.
phi1: random modulation phase shift for stimulus presented in the first observation area.
phi2: random modulation phase shift for stimulus presented in the second observation area.

Umbach, N., & Wickelmaier, F. (2014). Violations of regular minimality in discrimination judgments of frequency-modulated tones. Presented at the 45th European Mathematical Psychology Group (EMPG) Meeting, July 30 to August 1, Tuebingen, Germany.